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minetest/src/scriptapi.cpp

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/*
Minetest-c55
Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "scriptapi.h"
#include <iostream>
#include <list>
extern "C" {
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
}
#include "log.h"
#include "server.h"
#include "porting.h"
#include "filesys.h"
#include "serverobject.h"
#include "script.h"
#include "object_properties.h"
#include "content_sao.h" // For LuaEntitySAO and PlayerSAO
#include "itemdef.h"
#include "nodedef.h"
#include "biome.h"
#include "craftdef.h"
#include "main.h" // For g_settings
#include "settings.h" // For accessing g_settings
#include "nodemetadata.h"
#include "mapblock.h" // For getNodeBlockPos
#include "content_nodemeta.h"
#include "tool.h"
#include "daynightratio.h"
#include "noise.h" // PseudoRandom for LuaPseudoRandom
#include "util/pointedthing.h"
#include "rollback.h"
#include "treegen.h"
static void stackDump(lua_State *L, std::ostream &o)
{
int i;
int top = lua_gettop(L);
for (i = 1; i <= top; i++) { /* repeat for each level */
int t = lua_type(L, i);
switch (t) {
case LUA_TSTRING: /* strings */
o<<"\""<<lua_tostring(L, i)<<"\"";
break;
case LUA_TBOOLEAN: /* booleans */
o<<(lua_toboolean(L, i) ? "true" : "false");
break;
case LUA_TNUMBER: /* numbers */ {
char buf[10];
snprintf(buf, 10, "%g", lua_tonumber(L, i));
o<<buf;
break; }
default: /* other values */
o<<lua_typename(L, t);
break;
}
o<<" ";
}
o<<std::endl;
}
static void realitycheck(lua_State *L)
{
int top = lua_gettop(L);
if(top >= 30){
dstream<<"Stack is over 30:"<<std::endl;
stackDump(L, dstream);
script_error(L, "Stack is over 30 (reality check)");
}
}
class StackUnroller
{
private:
lua_State *m_lua;
int m_original_top;
public:
StackUnroller(lua_State *L):
m_lua(L),
m_original_top(-1)
{
m_original_top = lua_gettop(m_lua); // store stack height
}
~StackUnroller()
{
lua_settop(m_lua, m_original_top); // restore stack height
}
};
class ModNameStorer
{
private:
lua_State *L;
public:
ModNameStorer(lua_State *L_, const std::string modname):
L(L_)
{
// Store current modname in registry
lua_pushstring(L, modname.c_str());
lua_setfield(L, LUA_REGISTRYINDEX, "minetest_current_modname");
}
~ModNameStorer()
{
// Clear current modname in registry
lua_pushnil(L);
lua_setfield(L, LUA_REGISTRYINDEX, "minetest_current_modname");
}
};
/*
Getters for stuff in main tables
*/
static Server* get_server(lua_State *L)
{
// Get server from registry
lua_getfield(L, LUA_REGISTRYINDEX, "minetest_server");
Server *server = (Server*)lua_touserdata(L, -1);
lua_pop(L, 1);
return server;
}
static ServerEnvironment* get_env(lua_State *L)
{
// Get environment from registry
lua_getfield(L, LUA_REGISTRYINDEX, "minetest_env");
ServerEnvironment *env = (ServerEnvironment*)lua_touserdata(L, -1);
lua_pop(L, 1);
return env;
}
static void objectref_get(lua_State *L, u16 id)
{
// Get minetest.object_refs[i]
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "object_refs");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushnumber(L, id);
lua_gettable(L, -2);
lua_remove(L, -2); // object_refs
lua_remove(L, -2); // minetest
}
static void luaentity_get(lua_State *L, u16 id)
{
// Get minetest.luaentities[i]
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "luaentities");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushnumber(L, id);
lua_gettable(L, -2);
lua_remove(L, -2); // luaentities
lua_remove(L, -2); // minetest
}
/*
Table field getters
*/
static bool getstringfield(lua_State *L, int table,
const char *fieldname, std::string &result)
{
lua_getfield(L, table, fieldname);
bool got = false;
if(lua_isstring(L, -1)){
size_t len = 0;
const char *ptr = lua_tolstring(L, -1, &len);
result.assign(ptr, len);
got = true;
}
lua_pop(L, 1);
return got;
}
static bool getintfield(lua_State *L, int table,
const char *fieldname, int &result)
{
lua_getfield(L, table, fieldname);
bool got = false;
if(lua_isnumber(L, -1)){
result = lua_tonumber(L, -1);
got = true;
}
lua_pop(L, 1);
return got;
}
static bool getfloatfield(lua_State *L, int table,
const char *fieldname, float &result)
{
lua_getfield(L, table, fieldname);
bool got = false;
if(lua_isnumber(L, -1)){
result = lua_tonumber(L, -1);
got = true;
}
lua_pop(L, 1);
return got;
}
static bool getboolfield(lua_State *L, int table,
const char *fieldname, bool &result)
{
lua_getfield(L, table, fieldname);
bool got = false;
if(lua_isboolean(L, -1)){
result = lua_toboolean(L, -1);
got = true;
}
lua_pop(L, 1);
return got;
}
static std::string checkstringfield(lua_State *L, int table,
const char *fieldname)
{
lua_getfield(L, table, fieldname);
std::string s = luaL_checkstring(L, -1);
lua_pop(L, 1);
return s;
}
static std::string getstringfield_default(lua_State *L, int table,
const char *fieldname, const std::string &default_)
{
std::string result = default_;
getstringfield(L, table, fieldname, result);
return result;
}
static int getintfield_default(lua_State *L, int table,
const char *fieldname, int default_)
{
int result = default_;
getintfield(L, table, fieldname, result);
return result;
}
static float getfloatfield_default(lua_State *L, int table,
const char *fieldname, float default_)
{
float result = default_;
getfloatfield(L, table, fieldname, result);
return result;
}
static bool getboolfield_default(lua_State *L, int table,
const char *fieldname, bool default_)
{
bool result = default_;
getboolfield(L, table, fieldname, result);
return result;
}
struct EnumString
{
int num;
const char *str;
};
static bool string_to_enum(const EnumString *spec, int &result,
const std::string &str)
{
const EnumString *esp = spec;
while(esp->str){
if(str == std::string(esp->str)){
result = esp->num;
return true;
}
esp++;
}
return false;
}
/*static bool enum_to_string(const EnumString *spec, std::string &result,
int num)
{
const EnumString *esp = spec;
while(esp){
if(num == esp->num){
result = esp->str;
return true;
}
esp++;
}
return false;
}*/
static int getenumfield(lua_State *L, int table,
const char *fieldname, const EnumString *spec, int default_)
{
int result = default_;
string_to_enum(spec, result,
getstringfield_default(L, table, fieldname, ""));
return result;
}
static void setintfield(lua_State *L, int table,
const char *fieldname, int value)
{
lua_pushinteger(L, value);
if(table < 0)
table -= 1;
lua_setfield(L, table, fieldname);
}
static void setfloatfield(lua_State *L, int table,
const char *fieldname, float value)
{
lua_pushnumber(L, value);
if(table < 0)
table -= 1;
lua_setfield(L, table, fieldname);
}
static void setboolfield(lua_State *L, int table,
const char *fieldname, bool value)
{
lua_pushboolean(L, value);
if(table < 0)
table -= 1;
lua_setfield(L, table, fieldname);
}
static void warn_if_field_exists(lua_State *L, int table,
const char *fieldname, const std::string &message)
{
lua_getfield(L, table, fieldname);
if(!lua_isnil(L, -1)){
infostream<<script_get_backtrace(L)<<std::endl;
infostream<<"WARNING: field \""<<fieldname<<"\": "
<<message<<std::endl;
}
lua_pop(L, 1);
}
/*
EnumString definitions
*/
struct EnumString es_ItemType[] =
{
{ITEM_NONE, "none"},
{ITEM_NODE, "node"},
{ITEM_CRAFT, "craft"},
{ITEM_TOOL, "tool"},
{0, NULL},
};
struct EnumString es_DrawType[] =
{
{NDT_NORMAL, "normal"},
{NDT_AIRLIKE, "airlike"},
{NDT_LIQUID, "liquid"},
{NDT_FLOWINGLIQUID, "flowingliquid"},
{NDT_GLASSLIKE, "glasslike"},
{NDT_ALLFACES, "allfaces"},
{NDT_ALLFACES_OPTIONAL, "allfaces_optional"},
{NDT_TORCHLIKE, "torchlike"},
{NDT_SIGNLIKE, "signlike"},
{NDT_PLANTLIKE, "plantlike"},
{NDT_FENCELIKE, "fencelike"},
{NDT_RAILLIKE, "raillike"},
{NDT_NODEBOX, "nodebox"},
{0, NULL},
};
struct EnumString es_ContentParamType[] =
{
{CPT_NONE, "none"},
{CPT_LIGHT, "light"},
{0, NULL},
};
struct EnumString es_ContentParamType2[] =
{
{CPT2_NONE, "none"},
{CPT2_FULL, "full"},
{CPT2_FLOWINGLIQUID, "flowingliquid"},
{CPT2_FACEDIR, "facedir"},
{CPT2_WALLMOUNTED, "wallmounted"},
{0, NULL},
};
struct EnumString es_LiquidType[] =
{
{LIQUID_NONE, "none"},
{LIQUID_FLOWING, "flowing"},
{LIQUID_SOURCE, "source"},
{0, NULL},
};
struct EnumString es_NodeBoxType[] =
{
{NODEBOX_REGULAR, "regular"},
{NODEBOX_FIXED, "fixed"},
{NODEBOX_WALLMOUNTED, "wallmounted"},
{0, NULL},
};
struct EnumString es_CraftMethod[] =
{
{CRAFT_METHOD_NORMAL, "normal"},
{CRAFT_METHOD_COOKING, "cooking"},
{CRAFT_METHOD_FUEL, "fuel"},
{0, NULL},
};
struct EnumString es_TileAnimationType[] =
{
{TAT_NONE, "none"},
{TAT_VERTICAL_FRAMES, "vertical_frames"},
{0, NULL},
};
struct EnumString es_BiomeTerrainType[] =
{
{BIOME_TERRAIN_NORMAL, "normal"},
{BIOME_TERRAIN_LIQUID, "liquid"},
{BIOME_TERRAIN_NETHER, "nether"},
{BIOME_TERRAIN_AETHER, "aether"},
{BIOME_TERRAIN_FLAT, "flat"},
{0, NULL},
};
/*
C struct <-> Lua table converter functions
*/
static void push_v3f(lua_State *L, v3f p)
{
lua_newtable(L);
lua_pushnumber(L, p.X);
lua_setfield(L, -2, "x");
lua_pushnumber(L, p.Y);
lua_setfield(L, -2, "y");
lua_pushnumber(L, p.Z);
lua_setfield(L, -2, "z");
}
static v2s16 read_v2s16(lua_State *L, int index)
{
v2s16 p;
luaL_checktype(L, index, LUA_TTABLE);
lua_getfield(L, index, "x");
p.X = lua_tonumber(L, -1);
lua_pop(L, 1);
lua_getfield(L, index, "y");
p.Y = lua_tonumber(L, -1);
lua_pop(L, 1);
return p;
}
static v2f read_v2f(lua_State *L, int index)
{
v2f p;
luaL_checktype(L, index, LUA_TTABLE);
lua_getfield(L, index, "x");
p.X = lua_tonumber(L, -1);
lua_pop(L, 1);
lua_getfield(L, index, "y");
p.Y = lua_tonumber(L, -1);
lua_pop(L, 1);
return p;
}
static v3f read_v3f(lua_State *L, int index)
{
v3f pos;
luaL_checktype(L, index, LUA_TTABLE);
lua_getfield(L, index, "x");
pos.X = lua_tonumber(L, -1);
lua_pop(L, 1);
lua_getfield(L, index, "y");
pos.Y = lua_tonumber(L, -1);
lua_pop(L, 1);
lua_getfield(L, index, "z");
pos.Z = lua_tonumber(L, -1);
lua_pop(L, 1);
return pos;
}
static v3f check_v3f(lua_State *L, int index)
{
v3f pos;
luaL_checktype(L, index, LUA_TTABLE);
lua_getfield(L, index, "x");
pos.X = luaL_checknumber(L, -1);
lua_pop(L, 1);
lua_getfield(L, index, "y");
pos.Y = luaL_checknumber(L, -1);
lua_pop(L, 1);
lua_getfield(L, index, "z");
pos.Z = luaL_checknumber(L, -1);
lua_pop(L, 1);
return pos;
}
static void pushFloatPos(lua_State *L, v3f p)
{
p /= BS;
push_v3f(L, p);
}
static v3f checkFloatPos(lua_State *L, int index)
{
return check_v3f(L, index) * BS;
}
static void push_v3s16(lua_State *L, v3s16 p)
{
lua_newtable(L);
lua_pushnumber(L, p.X);
lua_setfield(L, -2, "x");
lua_pushnumber(L, p.Y);
lua_setfield(L, -2, "y");
lua_pushnumber(L, p.Z);
lua_setfield(L, -2, "z");
}
static v3s16 read_v3s16(lua_State *L, int index)
{
// Correct rounding at <0
v3f pf = read_v3f(L, index);
return floatToInt(pf, 1.0);
}
static v3s16 check_v3s16(lua_State *L, int index)
{
// Correct rounding at <0
v3f pf = check_v3f(L, index);
return floatToInt(pf, 1.0);
}
static void pushnode(lua_State *L, const MapNode &n, INodeDefManager *ndef)
{
lua_newtable(L);
lua_pushstring(L, ndef->get(n).name.c_str());
lua_setfield(L, -2, "name");
lua_pushnumber(L, n.getParam1());
lua_setfield(L, -2, "param1");
lua_pushnumber(L, n.getParam2());
lua_setfield(L, -2, "param2");
}
static MapNode readnode(lua_State *L, int index, INodeDefManager *ndef)
{
lua_getfield(L, index, "name");
const char *name = luaL_checkstring(L, -1);
lua_pop(L, 1);
u8 param1;
lua_getfield(L, index, "param1");
if(lua_isnil(L, -1))
param1 = 0;
else
param1 = lua_tonumber(L, -1);
lua_pop(L, 1);
u8 param2;
lua_getfield(L, index, "param2");
if(lua_isnil(L, -1))
param2 = 0;
else
param2 = lua_tonumber(L, -1);
lua_pop(L, 1);
return MapNode(ndef, name, param1, param2);
}
static video::SColor readARGB8(lua_State *L, int index)
{
video::SColor color;
luaL_checktype(L, index, LUA_TTABLE);
lua_getfield(L, index, "a");
if(lua_isnumber(L, -1))
color.setAlpha(lua_tonumber(L, -1));
lua_pop(L, 1);
lua_getfield(L, index, "r");
color.setRed(lua_tonumber(L, -1));
lua_pop(L, 1);
lua_getfield(L, index, "g");
color.setGreen(lua_tonumber(L, -1));
lua_pop(L, 1);
lua_getfield(L, index, "b");
color.setBlue(lua_tonumber(L, -1));
lua_pop(L, 1);
return color;
}
static aabb3f read_aabb3f(lua_State *L, int index, f32 scale)
{
aabb3f box;
if(lua_istable(L, index)){
lua_rawgeti(L, index, 1);
box.MinEdge.X = lua_tonumber(L, -1) * scale;
lua_pop(L, 1);
lua_rawgeti(L, index, 2);
box.MinEdge.Y = lua_tonumber(L, -1) * scale;
lua_pop(L, 1);
lua_rawgeti(L, index, 3);
box.MinEdge.Z = lua_tonumber(L, -1) * scale;
lua_pop(L, 1);
lua_rawgeti(L, index, 4);
box.MaxEdge.X = lua_tonumber(L, -1) * scale;
lua_pop(L, 1);
lua_rawgeti(L, index, 5);
box.MaxEdge.Y = lua_tonumber(L, -1) * scale;
lua_pop(L, 1);
lua_rawgeti(L, index, 6);
box.MaxEdge.Z = lua_tonumber(L, -1) * scale;
lua_pop(L, 1);
}
return box;
}
static std::vector<aabb3f> read_aabb3f_vector(lua_State *L, int index, f32 scale)
{
std::vector<aabb3f> boxes;
if(lua_istable(L, index)){
int n = lua_objlen(L, index);
// Check if it's a single box or a list of boxes
bool possibly_single_box = (n == 6);
for(int i = 1; i <= n && possibly_single_box; i++){
lua_rawgeti(L, index, i);
if(!lua_isnumber(L, -1))
possibly_single_box = false;
lua_pop(L, 1);
}
if(possibly_single_box){
// Read a single box
boxes.push_back(read_aabb3f(L, index, scale));
} else {
// Read a list of boxes
for(int i = 1; i <= n; i++){
lua_rawgeti(L, index, i);
boxes.push_back(read_aabb3f(L, -1, scale));
lua_pop(L, 1);
}
}
}
return boxes;
}
static NodeBox read_nodebox(lua_State *L, int index)
{
NodeBox nodebox;
if(lua_istable(L, -1)){
nodebox.type = (NodeBoxType)getenumfield(L, index, "type",
es_NodeBoxType, NODEBOX_REGULAR);
lua_getfield(L, index, "fixed");
if(lua_istable(L, -1))
nodebox.fixed = read_aabb3f_vector(L, -1, BS);
lua_pop(L, 1);
lua_getfield(L, index, "wall_top");
if(lua_istable(L, -1))
nodebox.wall_top = read_aabb3f(L, -1, BS);
lua_pop(L, 1);
lua_getfield(L, index, "wall_bottom");
if(lua_istable(L, -1))
nodebox.wall_bottom = read_aabb3f(L, -1, BS);
lua_pop(L, 1);
lua_getfield(L, index, "wall_side");
if(lua_istable(L, -1))
nodebox.wall_side = read_aabb3f(L, -1, BS);
lua_pop(L, 1);
}
return nodebox;
}
/*
Groups
*/
static void read_groups(lua_State *L, int index,
std::map<std::string, int> &result)
{
if (!lua_istable(L,index))
return;
result.clear();
lua_pushnil(L);
if(index < 0)
index -= 1;
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
std::string name = luaL_checkstring(L, -2);
int rating = luaL_checkinteger(L, -1);
result[name] = rating;
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
/*
Privileges
*/
static void read_privileges(lua_State *L, int index,
std::set<std::string> &result)
{
result.clear();
lua_pushnil(L);
if(index < 0)
index -= 1;
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
std::string key = luaL_checkstring(L, -2);
bool value = lua_toboolean(L, -1);
if(value)
result.insert(key);
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
/*
ToolCapabilities
*/
static ToolCapabilities read_tool_capabilities(
lua_State *L, int table)
{
ToolCapabilities toolcap;
getfloatfield(L, table, "full_punch_interval", toolcap.full_punch_interval);
getintfield(L, table, "max_drop_level", toolcap.max_drop_level);
lua_getfield(L, table, "groupcaps");
if(lua_istable(L, -1)){
int table_groupcaps = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table_groupcaps) != 0){
// key at index -2 and value at index -1
std::string groupname = luaL_checkstring(L, -2);
if(lua_istable(L, -1)){
int table_groupcap = lua_gettop(L);
// This will be created
ToolGroupCap groupcap;
// Read simple parameters
getintfield(L, table_groupcap, "maxlevel", groupcap.maxlevel);
getintfield(L, table_groupcap, "uses", groupcap.uses);
// DEPRECATED: maxwear
float maxwear = 0;
if(getfloatfield(L, table_groupcap, "maxwear", maxwear)){
if(maxwear != 0)
groupcap.uses = 1.0/maxwear;
else
groupcap.uses = 0;
infostream<<script_get_backtrace(L)<<std::endl;
infostream<<"WARNING: field \"maxwear\" is deprecated; "
<<"should replace with uses=1/maxwear"<<std::endl;
}
// Read "times" table
lua_getfield(L, table_groupcap, "times");
if(lua_istable(L, -1)){
int table_times = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table_times) != 0){
// key at index -2 and value at index -1
int rating = luaL_checkinteger(L, -2);
float time = luaL_checknumber(L, -1);
groupcap.times[rating] = time;
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
lua_pop(L, 1);
// Insert groupcap into toolcap
toolcap.groupcaps[groupname] = groupcap;
}
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
lua_pop(L, 1);
return toolcap;
}
static void set_tool_capabilities(lua_State *L, int table,
const ToolCapabilities &toolcap)
{
setfloatfield(L, table, "full_punch_interval", toolcap.full_punch_interval);
setintfield(L, table, "max_drop_level", toolcap.max_drop_level);
// Create groupcaps table
lua_newtable(L);
// For each groupcap
for(std::map<std::string, ToolGroupCap>::const_iterator
i = toolcap.groupcaps.begin(); i != toolcap.groupcaps.end(); i++){
// Create groupcap table
lua_newtable(L);
const std::string &name = i->first;
const ToolGroupCap &groupcap = i->second;
// Create subtable "times"
lua_newtable(L);
for(std::map<int, float>::const_iterator
i = groupcap.times.begin(); i != groupcap.times.end(); i++){
int rating = i->first;
float time = i->second;
lua_pushinteger(L, rating);
lua_pushnumber(L, time);
lua_settable(L, -3);
}
// Set subtable "times"
lua_setfield(L, -2, "times");
// Set simple parameters
setintfield(L, -1, "maxlevel", groupcap.maxlevel);
setintfield(L, -1, "uses", groupcap.uses);
// Insert groupcap table into groupcaps table
lua_setfield(L, -2, name.c_str());
}
// Set groupcaps table
lua_setfield(L, -2, "groupcaps");
}
static void push_tool_capabilities(lua_State *L,
const ToolCapabilities &prop)
{
lua_newtable(L);
set_tool_capabilities(L, -1, prop);
}
/*
DigParams
*/
static void set_dig_params(lua_State *L, int table,
const DigParams &params)
{
setboolfield(L, table, "diggable", params.diggable);
setfloatfield(L, table, "time", params.time);
setintfield(L, table, "wear", params.wear);
}
static void push_dig_params(lua_State *L,
const DigParams &params)
{
lua_newtable(L);
set_dig_params(L, -1, params);
}
/*
HitParams
*/
static void set_hit_params(lua_State *L, int table,
const HitParams &params)
{
setintfield(L, table, "hp", params.hp);
setintfield(L, table, "wear", params.wear);
}
static void push_hit_params(lua_State *L,
const HitParams &params)
{
lua_newtable(L);
set_hit_params(L, -1, params);
}
/*
PointedThing
*/
static void push_pointed_thing(lua_State *L, const PointedThing& pointed)
{
lua_newtable(L);
if(pointed.type == POINTEDTHING_NODE)
{
lua_pushstring(L, "node");
lua_setfield(L, -2, "type");
push_v3s16(L, pointed.node_undersurface);
lua_setfield(L, -2, "under");
push_v3s16(L, pointed.node_abovesurface);
lua_setfield(L, -2, "above");
}
else if(pointed.type == POINTEDTHING_OBJECT)
{
lua_pushstring(L, "object");
lua_setfield(L, -2, "type");
objectref_get(L, pointed.object_id);
lua_setfield(L, -2, "ref");
}
else
{
lua_pushstring(L, "nothing");
lua_setfield(L, -2, "type");
}
}
/*
SimpleSoundSpec
*/
static void read_soundspec(lua_State *L, int index, SimpleSoundSpec &spec)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(lua_isnil(L, index)){
} else if(lua_istable(L, index)){
getstringfield(L, index, "name", spec.name);
getfloatfield(L, index, "gain", spec.gain);
} else if(lua_isstring(L, index)){
spec.name = lua_tostring(L, index);
}
}
/*
ObjectProperties
*/
static void read_object_properties(lua_State *L, int index,
ObjectProperties *prop)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(!lua_istable(L, index))
return;
prop->hp_max = getintfield_default(L, -1, "hp_max", 10);
getboolfield(L, -1, "physical", prop->physical);
getfloatfield(L, -1, "weight", prop->weight);
lua_getfield(L, -1, "collisionbox");
if(lua_istable(L, -1))
prop->collisionbox = read_aabb3f(L, -1, 1.0);
lua_pop(L, 1);
getstringfield(L, -1, "visual", prop->visual);
getstringfield(L, -1, "mesh", prop->mesh);
lua_getfield(L, -1, "visual_size");
if(lua_istable(L, -1))
prop->visual_size = read_v2f(L, -1);
lua_pop(L, 1);
lua_getfield(L, -1, "textures");
if(lua_istable(L, -1)){
prop->textures.clear();
int table = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
if(lua_isstring(L, -1))
prop->textures.push_back(lua_tostring(L, -1));
else
prop->textures.push_back("");
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
lua_pop(L, 1);
lua_getfield(L, -1, "colors");
if(lua_istable(L, -1)){
prop->colors.clear();
int table = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
if(lua_isstring(L, -1))
prop->colors.push_back(readARGB8(L, -1));
else
prop->colors.push_back(video::SColor(255, 255, 255, 255));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
lua_pop(L, 1);
lua_getfield(L, -1, "spritediv");
if(lua_istable(L, -1))
prop->spritediv = read_v2s16(L, -1);
lua_pop(L, 1);
lua_getfield(L, -1, "initial_sprite_basepos");
if(lua_istable(L, -1))
prop->initial_sprite_basepos = read_v2s16(L, -1);
lua_pop(L, 1);
getboolfield(L, -1, "is_visible", prop->is_visible);
getboolfield(L, -1, "makes_footstep_sound", prop->makes_footstep_sound);
getfloatfield(L, -1, "automatic_rotate", prop->automatic_rotate);
}
/*
ItemDefinition
*/
static ItemDefinition read_item_definition(lua_State *L, int index,
ItemDefinition default_def = ItemDefinition())
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
// Read the item definition
ItemDefinition def = default_def;
def.type = (ItemType)getenumfield(L, index, "type",
es_ItemType, ITEM_NONE);
getstringfield(L, index, "name", def.name);
getstringfield(L, index, "description", def.description);
getstringfield(L, index, "inventory_image", def.inventory_image);
getstringfield(L, index, "wield_image", def.wield_image);
lua_getfield(L, index, "wield_scale");
if(lua_istable(L, -1)){
def.wield_scale = check_v3f(L, -1);
}
lua_pop(L, 1);
def.stack_max = getintfield_default(L, index, "stack_max", def.stack_max);
if(def.stack_max == 0)
def.stack_max = 1;
lua_getfield(L, index, "on_use");
def.usable = lua_isfunction(L, -1);
lua_pop(L, 1);
getboolfield(L, index, "liquids_pointable", def.liquids_pointable);
warn_if_field_exists(L, index, "tool_digging_properties",
"deprecated: use tool_capabilities");
lua_getfield(L, index, "tool_capabilities");
if(lua_istable(L, -1)){
def.tool_capabilities = new ToolCapabilities(
read_tool_capabilities(L, -1));
}
// If name is "" (hand), ensure there are ToolCapabilities
// because it will be looked up there whenever any other item has
// no ToolCapabilities
if(def.name == "" && def.tool_capabilities == NULL){
def.tool_capabilities = new ToolCapabilities();
}
lua_getfield(L, index, "groups");
read_groups(L, -1, def.groups);
lua_pop(L, 1);
// Client shall immediately place this node when player places the item.
// Server will update the precise end result a moment later.
// "" = no prediction
getstringfield(L, index, "node_placement_prediction",
def.node_placement_prediction);
return def;
}
/*
TileDef
*/
static TileDef read_tiledef(lua_State *L, int index)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
TileDef tiledef;
// key at index -2 and value at index
if(lua_isstring(L, index)){
// "default_lava.png"
tiledef.name = lua_tostring(L, index);
}
else if(lua_istable(L, index))
{
// {name="default_lava.png", animation={}}
tiledef.name = "";
getstringfield(L, index, "name", tiledef.name);
getstringfield(L, index, "image", tiledef.name); // MaterialSpec compat.
tiledef.backface_culling = getboolfield_default(
L, index, "backface_culling", true);
// animation = {}
lua_getfield(L, index, "animation");
if(lua_istable(L, -1)){
// {type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0}
tiledef.animation.type = (TileAnimationType)
getenumfield(L, -1, "type", es_TileAnimationType,
TAT_NONE);
tiledef.animation.aspect_w =
getintfield_default(L, -1, "aspect_w", 16);
tiledef.animation.aspect_h =
getintfield_default(L, -1, "aspect_h", 16);
tiledef.animation.length =
getfloatfield_default(L, -1, "length", 1.0);
}
lua_pop(L, 1);
}
return tiledef;
}
/*
ContentFeatures
*/
static ContentFeatures read_content_features(lua_State *L, int index)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
ContentFeatures f;
/* Cache existence of some callbacks */
lua_getfield(L, index, "on_construct");
if(!lua_isnil(L, -1)) f.has_on_construct = true;
lua_pop(L, 1);
lua_getfield(L, index, "on_destruct");
if(!lua_isnil(L, -1)) f.has_on_destruct = true;
lua_pop(L, 1);
lua_getfield(L, index, "after_destruct");
if(!lua_isnil(L, -1)) f.has_after_destruct = true;
lua_pop(L, 1);
/* Name */
getstringfield(L, index, "name", f.name);
/* Groups */
lua_getfield(L, index, "groups");
read_groups(L, -1, f.groups);
lua_pop(L, 1);
/* Visual definition */
f.drawtype = (NodeDrawType)getenumfield(L, index, "drawtype", es_DrawType,
NDT_NORMAL);
getfloatfield(L, index, "visual_scale", f.visual_scale);
// tiles = {}
lua_getfield(L, index, "tiles");
// If nil, try the deprecated name "tile_images" instead
if(lua_isnil(L, -1)){
lua_pop(L, 1);
warn_if_field_exists(L, index, "tile_images",
"Deprecated; new name is \"tiles\".");
lua_getfield(L, index, "tile_images");
}
if(lua_istable(L, -1)){
int table = lua_gettop(L);
lua_pushnil(L);
int i = 0;
while(lua_next(L, table) != 0){
// Read tiledef from value
f.tiledef[i] = read_tiledef(L, -1);
// removes value, keeps key for next iteration
lua_pop(L, 1);
i++;
if(i==6){
lua_pop(L, 1);
break;
}
}
// Copy last value to all remaining textures
if(i >= 1){
TileDef lasttile = f.tiledef[i-1];
while(i < 6){
f.tiledef[i] = lasttile;
i++;
}
}
}
lua_pop(L, 1);
// special_tiles = {}
lua_getfield(L, index, "special_tiles");
// If nil, try the deprecated name "special_materials" instead
if(lua_isnil(L, -1)){
lua_pop(L, 1);
warn_if_field_exists(L, index, "special_materials",
"Deprecated; new name is \"special_tiles\".");
lua_getfield(L, index, "special_materials");
}
if(lua_istable(L, -1)){
int table = lua_gettop(L);
lua_pushnil(L);
int i = 0;
while(lua_next(L, table) != 0){
// Read tiledef from value
f.tiledef_special[i] = read_tiledef(L, -1);
// removes value, keeps key for next iteration
lua_pop(L, 1);
i++;
if(i==6){
lua_pop(L, 1);
break;
}
}
}
lua_pop(L, 1);
f.alpha = getintfield_default(L, index, "alpha", 255);
/* Other stuff */
lua_getfield(L, index, "post_effect_color");
if(!lua_isnil(L, -1))
f.post_effect_color = readARGB8(L, -1);
lua_pop(L, 1);
f.param_type = (ContentParamType)getenumfield(L, index, "paramtype",
es_ContentParamType, CPT_NONE);
f.param_type_2 = (ContentParamType2)getenumfield(L, index, "paramtype2",
es_ContentParamType2, CPT2_NONE);
// Warn about some deprecated fields
warn_if_field_exists(L, index, "wall_mounted",
"deprecated: use paramtype2 = 'wallmounted'");
warn_if_field_exists(L, index, "light_propagates",
"deprecated: determined from paramtype");
warn_if_field_exists(L, index, "dug_item",
"deprecated: use 'drop' field");
warn_if_field_exists(L, index, "extra_dug_item",
"deprecated: use 'drop' field");
warn_if_field_exists(L, index, "extra_dug_item_rarity",
"deprecated: use 'drop' field");
warn_if_field_exists(L, index, "metadata_name",
"deprecated: use on_add and metadata callbacks");
// True for all ground-like things like stone and mud, false for eg. trees
getboolfield(L, index, "is_ground_content", f.is_ground_content);
f.light_propagates = (f.param_type == CPT_LIGHT);
getboolfield(L, index, "sunlight_propagates", f.sunlight_propagates);
// This is used for collision detection.
// Also for general solidness queries.
getboolfield(L, index, "walkable", f.walkable);
// Player can point to these
getboolfield(L, index, "pointable", f.pointable);
// Player can dig these
getboolfield(L, index, "diggable", f.diggable);
// Player can climb these
getboolfield(L, index, "climbable", f.climbable);
// Player can build on these
getboolfield(L, index, "buildable_to", f.buildable_to);
// Whether the node is non-liquid, source liquid or flowing liquid
f.liquid_type = (LiquidType)getenumfield(L, index, "liquidtype",
es_LiquidType, LIQUID_NONE);
// If the content is liquid, this is the flowing version of the liquid.
getstringfield(L, index, "liquid_alternative_flowing",
f.liquid_alternative_flowing);
// If the content is liquid, this is the source version of the liquid.
getstringfield(L, index, "liquid_alternative_source",
f.liquid_alternative_source);
// Viscosity for fluid flow, ranging from 1 to 7, with
// 1 giving almost instantaneous propagation and 7 being
// the slowest possible
f.liquid_viscosity = getintfield_default(L, index,
"liquid_viscosity", f.liquid_viscosity);
getboolfield(L, index, "liquid_renewable", f.liquid_renewable);
// Amount of light the node emits
f.light_source = getintfield_default(L, index,
"light_source", f.light_source);
f.damage_per_second = getintfield_default(L, index,
"damage_per_second", f.damage_per_second);
lua_getfield(L, index, "node_box");
if(lua_istable(L, -1))
f.node_box = read_nodebox(L, -1);
lua_pop(L, 1);
lua_getfield(L, index, "selection_box");
if(lua_istable(L, -1))
f.selection_box = read_nodebox(L, -1);
lua_pop(L, 1);
// Set to true if paramtype used to be 'facedir_simple'
getboolfield(L, index, "legacy_facedir_simple", f.legacy_facedir_simple);
// Set to true if wall_mounted used to be set to true
getboolfield(L, index, "legacy_wallmounted", f.legacy_wallmounted);
// Sound table
lua_getfield(L, index, "sounds");
if(lua_istable(L, -1)){
lua_getfield(L, -1, "footstep");
read_soundspec(L, -1, f.sound_footstep);
lua_pop(L, 1);
lua_getfield(L, -1, "dig");
read_soundspec(L, -1, f.sound_dig);
lua_pop(L, 1);
lua_getfield(L, -1, "dug");
read_soundspec(L, -1, f.sound_dug);
lua_pop(L, 1);
}
lua_pop(L, 1);
return f;
}
/*
Inventory stuff
*/
static ItemStack read_item(lua_State *L, int index);
static std::vector<ItemStack> read_items(lua_State *L, int index);
// creates a table of ItemStacks
static void push_items(lua_State *L, const std::vector<ItemStack> &items);
static void inventory_set_list_from_lua(Inventory *inv, const char *name,
lua_State *L, int tableindex, int forcesize=-1)
{
if(tableindex < 0)
tableindex = lua_gettop(L) + 1 + tableindex;
// If nil, delete list
if(lua_isnil(L, tableindex)){
inv->deleteList(name);
return;
}
// Otherwise set list
std::vector<ItemStack> items = read_items(L, tableindex);
int listsize = (forcesize != -1) ? forcesize : items.size();
InventoryList *invlist = inv->addList(name, listsize);
int index = 0;
for(std::vector<ItemStack>::const_iterator
i = items.begin(); i != items.end(); i++){
if(forcesize != -1 && index == forcesize)
break;
invlist->changeItem(index, *i);
index++;
}
while(forcesize != -1 && index < forcesize){
invlist->deleteItem(index);
index++;
}
}
static void inventory_get_list_to_lua(Inventory *inv, const char *name,
lua_State *L)
{
InventoryList *invlist = inv->getList(name);
if(invlist == NULL){
lua_pushnil(L);
return;
}
std::vector<ItemStack> items;
for(u32 i=0; i<invlist->getSize(); i++)
items.push_back(invlist->getItem(i));
push_items(L, items);
}
/*
Helpful macros for userdata classes
*/
#define method(class, name) {#name, class::l_##name}
/*
LuaItemStack
*/
class LuaItemStack
{
private:
ItemStack m_stack;
static const char className[];
static const luaL_reg methods[];
// Exported functions
// garbage collector
static int gc_object(lua_State *L)
{
LuaItemStack *o = *(LuaItemStack **)(lua_touserdata(L, 1));
delete o;
return 0;
}
// is_empty(self) -> true/false
static int l_is_empty(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
lua_pushboolean(L, item.empty());
return 1;
}
// get_name(self) -> string
static int l_get_name(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
lua_pushstring(L, item.name.c_str());
return 1;
}
// get_count(self) -> number
static int l_get_count(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
lua_pushinteger(L, item.count);
return 1;
}
// get_wear(self) -> number
static int l_get_wear(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
lua_pushinteger(L, item.wear);
return 1;
}
// get_metadata(self) -> string
static int l_get_metadata(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
lua_pushlstring(L, item.metadata.c_str(), item.metadata.size());
return 1;
}
// clear(self) -> true
static int l_clear(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
o->m_stack.clear();
lua_pushboolean(L, true);
return 1;
}
// replace(self, itemstack or itemstring or table or nil) -> true
static int l_replace(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
o->m_stack = read_item(L, 2);
lua_pushboolean(L, true);
return 1;
}
// to_string(self) -> string
static int l_to_string(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
std::string itemstring = o->m_stack.getItemString();
lua_pushstring(L, itemstring.c_str());
return 1;
}
// to_table(self) -> table or nil
static int l_to_table(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
const ItemStack &item = o->m_stack;
if(item.empty())
{
lua_pushnil(L);
}
else
{
lua_newtable(L);
lua_pushstring(L, item.name.c_str());
lua_setfield(L, -2, "name");
lua_pushinteger(L, item.count);
lua_setfield(L, -2, "count");
lua_pushinteger(L, item.wear);
lua_setfield(L, -2, "wear");
lua_pushlstring(L, item.metadata.c_str(), item.metadata.size());
lua_setfield(L, -2, "metadata");
}
return 1;
}
// get_stack_max(self) -> number
static int l_get_stack_max(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
lua_pushinteger(L, item.getStackMax(get_server(L)->idef()));
return 1;
}
// get_free_space(self) -> number
static int l_get_free_space(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
lua_pushinteger(L, item.freeSpace(get_server(L)->idef()));
return 1;
}
// is_known(self) -> true/false
// Checks if the item is defined.
static int l_is_known(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
bool is_known = item.isKnown(get_server(L)->idef());
lua_pushboolean(L, is_known);
return 1;
}
// get_definition(self) -> table
// Returns the item definition table from minetest.registered_items,
// or a fallback one (name="unknown")
static int l_get_definition(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
// Get minetest.registered_items[name]
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_items");
luaL_checktype(L, -1, LUA_TTABLE);
lua_getfield(L, -1, item.name.c_str());
if(lua_isnil(L, -1))
{
lua_pop(L, 1);
lua_getfield(L, -1, "unknown");
}
return 1;
}
// get_tool_capabilities(self) -> table
// Returns the effective tool digging properties.
// Returns those of the hand ("") if this item has none associated.
static int l_get_tool_capabilities(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
const ToolCapabilities &prop =
item.getToolCapabilities(get_server(L)->idef());
push_tool_capabilities(L, prop);
return 1;
}
// add_wear(self, amount) -> true/false
// The range for "amount" is [0,65535]. Wear is only added if the item
// is a tool. Adding wear might destroy the item.
// Returns true if the item is (or was) a tool.
static int l_add_wear(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
int amount = lua_tointeger(L, 2);
bool result = item.addWear(amount, get_server(L)->idef());
lua_pushboolean(L, result);
return 1;
}
// add_item(self, itemstack or itemstring or table or nil) -> itemstack
// Returns leftover item stack
static int l_add_item(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
ItemStack newitem = read_item(L, 2);
ItemStack leftover = item.addItem(newitem, get_server(L)->idef());
create(L, leftover);
return 1;
}
// item_fits(self, itemstack or itemstring or table or nil) -> true/false, itemstack
// First return value is true iff the new item fits fully into the stack
// Second return value is the would-be-left-over item stack
static int l_item_fits(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
ItemStack newitem = read_item(L, 2);
ItemStack restitem;
bool fits = item.itemFits(newitem, &restitem, get_server(L)->idef());
lua_pushboolean(L, fits); // first return value
create(L, restitem); // second return value
return 2;
}
// take_item(self, takecount=1) -> itemstack
static int l_take_item(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
u32 takecount = 1;
if(!lua_isnone(L, 2))
takecount = luaL_checkinteger(L, 2);
ItemStack taken = item.takeItem(takecount);
create(L, taken);
return 1;
}
// peek_item(self, peekcount=1) -> itemstack
static int l_peek_item(lua_State *L)
{
LuaItemStack *o = checkobject(L, 1);
ItemStack &item = o->m_stack;
u32 peekcount = 1;
if(!lua_isnone(L, 2))
peekcount = lua_tointeger(L, 2);
ItemStack peekaboo = item.peekItem(peekcount);
create(L, peekaboo);
return 1;
}
public:
LuaItemStack(const ItemStack &item):
m_stack(item)
{
}
~LuaItemStack()
{
}
const ItemStack& getItem() const
{
return m_stack;
}
ItemStack& getItem()
{
return m_stack;
}
// LuaItemStack(itemstack or itemstring or table or nil)
// Creates an LuaItemStack and leaves it on top of stack
static int create_object(lua_State *L)
{
ItemStack item = read_item(L, 1);
LuaItemStack *o = new LuaItemStack(item);
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
return 1;
}
// Not callable from Lua
static int create(lua_State *L, const ItemStack &item)
{
LuaItemStack *o = new LuaItemStack(item);
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
return 1;
}
static LuaItemStack* checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(LuaItemStack**)ud; // unbox pointer
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Can be created from Lua (LuaItemStack(itemstack or itemstring or table or nil))
lua_register(L, className, create_object);
}
};
const char LuaItemStack::className[] = "ItemStack";
const luaL_reg LuaItemStack::methods[] = {
method(LuaItemStack, is_empty),
method(LuaItemStack, get_name),
method(LuaItemStack, get_count),
method(LuaItemStack, get_wear),
method(LuaItemStack, get_metadata),
method(LuaItemStack, clear),
method(LuaItemStack, replace),
method(LuaItemStack, to_string),
method(LuaItemStack, to_table),
method(LuaItemStack, get_stack_max),
method(LuaItemStack, get_free_space),
method(LuaItemStack, is_known),
method(LuaItemStack, get_definition),
method(LuaItemStack, get_tool_capabilities),
method(LuaItemStack, add_wear),
method(LuaItemStack, add_item),
method(LuaItemStack, item_fits),
method(LuaItemStack, take_item),
method(LuaItemStack, peek_item),
{0,0}
};
static ItemStack read_item(lua_State *L, int index)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(lua_isnil(L, index))
{
return ItemStack();
}
else if(lua_isuserdata(L, index))
{
// Convert from LuaItemStack
LuaItemStack *o = LuaItemStack::checkobject(L, index);
return o->getItem();
}
else if(lua_isstring(L, index))
{
// Convert from itemstring
std::string itemstring = lua_tostring(L, index);
IItemDefManager *idef = get_server(L)->idef();
try
{
ItemStack item;
item.deSerialize(itemstring, idef);
return item;
}
catch(SerializationError &e)
{
infostream<<"WARNING: unable to create item from itemstring"
<<": "<<itemstring<<std::endl;
return ItemStack();
}
}
else if(lua_istable(L, index))
{
// Convert from table
IItemDefManager *idef = get_server(L)->idef();
std::string name = getstringfield_default(L, index, "name", "");
int count = getintfield_default(L, index, "count", 1);
int wear = getintfield_default(L, index, "wear", 0);
std::string metadata = getstringfield_default(L, index, "metadata", "");
return ItemStack(name, count, wear, metadata, idef);
}
else
{
throw LuaError(L, "Expecting itemstack, itemstring, table or nil");
}
}
static std::vector<ItemStack> read_items(lua_State *L, int index)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
std::vector<ItemStack> items;
luaL_checktype(L, index, LUA_TTABLE);
lua_pushnil(L);
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
items.push_back(read_item(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
return items;
}
// creates a table of ItemStacks
static void push_items(lua_State *L, const std::vector<ItemStack> &items)
{
// Get the table insert function
lua_getglobal(L, "table");
lua_getfield(L, -1, "insert");
int table_insert = lua_gettop(L);
// Create and fill table
lua_newtable(L);
int table = lua_gettop(L);
for(u32 i=0; i<items.size(); i++){
ItemStack item = items[i];
lua_pushvalue(L, table_insert);
lua_pushvalue(L, table);
LuaItemStack::create(L, item);
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
lua_remove(L, -2); // Remove table
lua_remove(L, -2); // Remove insert
}
/*
InvRef
*/
class InvRef
{
private:
InventoryLocation m_loc;
static const char className[];
static const luaL_reg methods[];
static InvRef *checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(InvRef**)ud; // unbox pointer
}
static Inventory* getinv(lua_State *L, InvRef *ref)
{
return get_server(L)->getInventory(ref->m_loc);
}
static InventoryList* getlist(lua_State *L, InvRef *ref,
const char *listname)
{
Inventory *inv = getinv(L, ref);
if(!inv)
return NULL;
return inv->getList(listname);
}
static void reportInventoryChange(lua_State *L, InvRef *ref)
{
// Inform other things that the inventory has changed
get_server(L)->setInventoryModified(ref->m_loc);
}
// Exported functions
// garbage collector
static int gc_object(lua_State *L) {
InvRef *o = *(InvRef **)(lua_touserdata(L, 1));
delete o;
return 0;
}
// is_empty(self, listname) -> true/false
static int l_is_empty(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
InventoryList *list = getlist(L, ref, listname);
if(list && list->getUsedSlots() > 0){
lua_pushboolean(L, false);
} else {
lua_pushboolean(L, true);
}
return 1;
}
// get_size(self, listname)
static int l_get_size(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
InventoryList *list = getlist(L, ref, listname);
if(list){
lua_pushinteger(L, list->getSize());
} else {
lua_pushinteger(L, 0);
}
return 1;
}
// get_width(self, listname)
static int l_get_width(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
InventoryList *list = getlist(L, ref, listname);
if(list){
lua_pushinteger(L, list->getWidth());
} else {
lua_pushinteger(L, 0);
}
return 1;
}
// set_size(self, listname, size)
static int l_set_size(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
int newsize = luaL_checknumber(L, 3);
Inventory *inv = getinv(L, ref);
if(newsize == 0){
inv->deleteList(listname);
reportInventoryChange(L, ref);
return 0;
}
InventoryList *list = inv->getList(listname);
if(list){
list->setSize(newsize);
} else {
list = inv->addList(listname, newsize);
}
reportInventoryChange(L, ref);
return 0;
}
// set_width(self, listname, size)
static int l_set_width(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
int newwidth = luaL_checknumber(L, 3);
Inventory *inv = getinv(L, ref);
InventoryList *list = inv->getList(listname);
if(list){
list->setWidth(newwidth);
} else {
return 0;
}
reportInventoryChange(L, ref);
return 0;
}
// get_stack(self, listname, i) -> itemstack
static int l_get_stack(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
int i = luaL_checknumber(L, 3) - 1;
InventoryList *list = getlist(L, ref, listname);
ItemStack item;
if(list != NULL && i >= 0 && i < (int) list->getSize())
item = list->getItem(i);
LuaItemStack::create(L, item);
return 1;
}
// set_stack(self, listname, i, stack) -> true/false
static int l_set_stack(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
int i = luaL_checknumber(L, 3) - 1;
ItemStack newitem = read_item(L, 4);
InventoryList *list = getlist(L, ref, listname);
if(list != NULL && i >= 0 && i < (int) list->getSize()){
list->changeItem(i, newitem);
reportInventoryChange(L, ref);
lua_pushboolean(L, true);
} else {
lua_pushboolean(L, false);
}
return 1;
}
// get_list(self, listname) -> list or nil
static int l_get_list(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
Inventory *inv = getinv(L, ref);
inventory_get_list_to_lua(inv, listname, L);
return 1;
}
// set_list(self, listname, list)
static int l_set_list(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
Inventory *inv = getinv(L, ref);
InventoryList *list = inv->getList(listname);
if(list)
inventory_set_list_from_lua(inv, listname, L, 3,
list->getSize());
else
inventory_set_list_from_lua(inv, listname, L, 3);
reportInventoryChange(L, ref);
return 0;
}
// add_item(self, listname, itemstack or itemstring or table or nil) -> itemstack
// Returns the leftover stack
static int l_add_item(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
ItemStack item = read_item(L, 3);
InventoryList *list = getlist(L, ref, listname);
if(list){
ItemStack leftover = list->addItem(item);
if(leftover.count != item.count)
reportInventoryChange(L, ref);
LuaItemStack::create(L, leftover);
} else {
LuaItemStack::create(L, item);
}
return 1;
}
// room_for_item(self, listname, itemstack or itemstring or table or nil) -> true/false
// Returns true if the item completely fits into the list
static int l_room_for_item(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
ItemStack item = read_item(L, 3);
InventoryList *list = getlist(L, ref, listname);
if(list){
lua_pushboolean(L, list->roomForItem(item));
} else {
lua_pushboolean(L, false);
}
return 1;
}
// contains_item(self, listname, itemstack or itemstring or table or nil) -> true/false
// Returns true if the list contains the given count of the given item name
static int l_contains_item(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
ItemStack item = read_item(L, 3);
InventoryList *list = getlist(L, ref, listname);
if(list){
lua_pushboolean(L, list->containsItem(item));
} else {
lua_pushboolean(L, false);
}
return 1;
}
// remove_item(self, listname, itemstack or itemstring or table or nil) -> itemstack
// Returns the items that were actually removed
static int l_remove_item(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const char *listname = luaL_checkstring(L, 2);
ItemStack item = read_item(L, 3);
InventoryList *list = getlist(L, ref, listname);
if(list){
ItemStack removed = list->removeItem(item);
if(!removed.empty())
reportInventoryChange(L, ref);
LuaItemStack::create(L, removed);
} else {
LuaItemStack::create(L, ItemStack());
}
return 1;
}
// get_location() -> location (like minetest.get_inventory(location))
static int l_get_location(lua_State *L)
{
InvRef *ref = checkobject(L, 1);
const InventoryLocation &loc = ref->m_loc;
switch(loc.type){
case InventoryLocation::PLAYER:
lua_newtable(L);
lua_pushstring(L, "player");
lua_setfield(L, -2, "type");
lua_pushstring(L, loc.name.c_str());
lua_setfield(L, -2, "name");
return 1;
case InventoryLocation::NODEMETA:
lua_newtable(L);
lua_pushstring(L, "nodemeta");
lua_setfield(L, -2, "type");
push_v3s16(L, loc.p);
lua_setfield(L, -2, "name");
return 1;
case InventoryLocation::DETACHED:
lua_newtable(L);
lua_pushstring(L, "detached");
lua_setfield(L, -2, "type");
lua_pushstring(L, loc.name.c_str());
lua_setfield(L, -2, "name");
return 1;
case InventoryLocation::UNDEFINED:
case InventoryLocation::CURRENT_PLAYER:
break;
}
lua_newtable(L);
lua_pushstring(L, "undefined");
lua_setfield(L, -2, "type");
return 1;
}
public:
InvRef(const InventoryLocation &loc):
m_loc(loc)
{
}
~InvRef()
{
}
// Creates an InvRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
static void create(lua_State *L, const InventoryLocation &loc)
{
InvRef *o = new InvRef(loc);
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
}
static void createPlayer(lua_State *L, Player *player)
{
InventoryLocation loc;
loc.setPlayer(player->getName());
create(L, loc);
}
static void createNodeMeta(lua_State *L, v3s16 p)
{
InventoryLocation loc;
loc.setNodeMeta(p);
create(L, loc);
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Cannot be created from Lua
//lua_register(L, className, create_object);
}
};
const char InvRef::className[] = "InvRef";
const luaL_reg InvRef::methods[] = {
method(InvRef, is_empty),
method(InvRef, get_size),
method(InvRef, set_size),
method(InvRef, get_width),
method(InvRef, set_width),
method(InvRef, get_stack),
method(InvRef, set_stack),
method(InvRef, get_list),
method(InvRef, set_list),
method(InvRef, add_item),
method(InvRef, room_for_item),
method(InvRef, contains_item),
method(InvRef, remove_item),
method(InvRef, get_location),
{0,0}
};
/*
NodeMetaRef
*/
class NodeMetaRef
{
private:
v3s16 m_p;
ServerEnvironment *m_env;
static const char className[];
static const luaL_reg methods[];
static NodeMetaRef *checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(NodeMetaRef**)ud; // unbox pointer
}
static NodeMetadata* getmeta(NodeMetaRef *ref, bool auto_create)
{
NodeMetadata *meta = ref->m_env->getMap().getNodeMetadata(ref->m_p);
if(meta == NULL && auto_create)
{
meta = new NodeMetadata(ref->m_env->getGameDef());
ref->m_env->getMap().setNodeMetadata(ref->m_p, meta);
}
return meta;
}
static void reportMetadataChange(NodeMetaRef *ref)
{
// NOTE: This same code is in rollback_interface.cpp
// Inform other things that the metadata has changed
v3s16 blockpos = getNodeBlockPos(ref->m_p);
MapEditEvent event;
event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
event.p = blockpos;
ref->m_env->getMap().dispatchEvent(&event);
// Set the block to be saved
MapBlock *block = ref->m_env->getMap().getBlockNoCreateNoEx(blockpos);
if(block)
block->raiseModified(MOD_STATE_WRITE_NEEDED,
"NodeMetaRef::reportMetadataChange");
}
// Exported functions
// garbage collector
static int gc_object(lua_State *L) {
NodeMetaRef *o = *(NodeMetaRef **)(lua_touserdata(L, 1));
delete o;
return 0;
}
// get_string(self, name)
static int l_get_string(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
std::string name = luaL_checkstring(L, 2);
NodeMetadata *meta = getmeta(ref, false);
if(meta == NULL){
lua_pushlstring(L, "", 0);
return 1;
}
std::string str = meta->getString(name);
lua_pushlstring(L, str.c_str(), str.size());
return 1;
}
// set_string(self, name, var)
static int l_set_string(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
std::string name = luaL_checkstring(L, 2);
size_t len = 0;
const char *s = lua_tolstring(L, 3, &len);
std::string str(s, len);
NodeMetadata *meta = getmeta(ref, !str.empty());
if(meta == NULL || str == meta->getString(name))
return 0;
meta->setString(name, str);
reportMetadataChange(ref);
return 0;
}
// get_int(self, name)
static int l_get_int(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
std::string name = lua_tostring(L, 2);
NodeMetadata *meta = getmeta(ref, false);
if(meta == NULL){
lua_pushnumber(L, 0);
return 1;
}
std::string str = meta->getString(name);
lua_pushnumber(L, stoi(str));
return 1;
}
// set_int(self, name, var)
static int l_set_int(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
std::string name = lua_tostring(L, 2);
int a = lua_tointeger(L, 3);
std::string str = itos(a);
NodeMetadata *meta = getmeta(ref, true);
if(meta == NULL || str == meta->getString(name))
return 0;
meta->setString(name, str);
reportMetadataChange(ref);
return 0;
}
// get_float(self, name)
static int l_get_float(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
std::string name = lua_tostring(L, 2);
NodeMetadata *meta = getmeta(ref, false);
if(meta == NULL){
lua_pushnumber(L, 0);
return 1;
}
std::string str = meta->getString(name);
lua_pushnumber(L, stof(str));
return 1;
}
// set_float(self, name, var)
static int l_set_float(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
std::string name = lua_tostring(L, 2);
float a = lua_tonumber(L, 3);
std::string str = ftos(a);
NodeMetadata *meta = getmeta(ref, true);
if(meta == NULL || str == meta->getString(name))
return 0;
meta->setString(name, str);
reportMetadataChange(ref);
return 0;
}
// get_inventory(self)
static int l_get_inventory(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
getmeta(ref, true); // try to ensure the metadata exists
InvRef::createNodeMeta(L, ref->m_p);
return 1;
}
// to_table(self)
static int l_to_table(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
NodeMetadata *meta = getmeta(ref, true);
if(meta == NULL){
lua_pushnil(L);
return 1;
}
lua_newtable(L);
// fields
lua_newtable(L);
{
std::map<std::string, std::string> fields = meta->getStrings();
for(std::map<std::string, std::string>::const_iterator
i = fields.begin(); i != fields.end(); i++){
const std::string &name = i->first;
const std::string &value = i->second;
lua_pushlstring(L, name.c_str(), name.size());
lua_pushlstring(L, value.c_str(), value.size());
lua_settable(L, -3);
}
}
lua_setfield(L, -2, "fields");
// inventory
lua_newtable(L);
Inventory *inv = meta->getInventory();
if(inv){
std::vector<const InventoryList*> lists = inv->getLists();
for(std::vector<const InventoryList*>::const_iterator
i = lists.begin(); i != lists.end(); i++){
inventory_get_list_to_lua(inv, (*i)->getName().c_str(), L);
lua_setfield(L, -2, (*i)->getName().c_str());
}
}
lua_setfield(L, -2, "inventory");
return 1;
}
// from_table(self, table)
static int l_from_table(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
int base = 2;
if(lua_isnil(L, base)){
// No metadata
ref->m_env->getMap().removeNodeMetadata(ref->m_p);
lua_pushboolean(L, true);
return 1;
}
// Has metadata; clear old one first
ref->m_env->getMap().removeNodeMetadata(ref->m_p);
// Create new metadata
NodeMetadata *meta = getmeta(ref, true);
// Set fields
lua_getfield(L, base, "fields");
int fieldstable = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, fieldstable) != 0){
// key at index -2 and value at index -1
std::string name = lua_tostring(L, -2);
size_t cl;
const char *cs = lua_tolstring(L, -1, &cl);
std::string value(cs, cl);
meta->setString(name, value);
lua_pop(L, 1); // removes value, keeps key for next iteration
}
// Set inventory
Inventory *inv = meta->getInventory();
lua_getfield(L, base, "inventory");
int inventorytable = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, inventorytable) != 0){
// key at index -2 and value at index -1
std::string name = lua_tostring(L, -2);
inventory_set_list_from_lua(inv, name.c_str(), L, -1);
lua_pop(L, 1); // removes value, keeps key for next iteration
}
reportMetadataChange(ref);
lua_pushboolean(L, true);
return 1;
}
public:
NodeMetaRef(v3s16 p, ServerEnvironment *env):
m_p(p),
m_env(env)
{
}
~NodeMetaRef()
{
}
// Creates an NodeMetaRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
static void create(lua_State *L, v3s16 p, ServerEnvironment *env)
{
NodeMetaRef *o = new NodeMetaRef(p, env);
//infostream<<"NodeMetaRef::create: o="<<o<<std::endl;
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Cannot be created from Lua
//lua_register(L, className, create_object);
}
};
const char NodeMetaRef::className[] = "NodeMetaRef";
const luaL_reg NodeMetaRef::methods[] = {
method(NodeMetaRef, get_string),
method(NodeMetaRef, set_string),
method(NodeMetaRef, get_int),
method(NodeMetaRef, set_int),
method(NodeMetaRef, get_float),
method(NodeMetaRef, set_float),
method(NodeMetaRef, get_inventory),
method(NodeMetaRef, to_table),
method(NodeMetaRef, from_table),
{0,0}
};
/*
ObjectRef
*/
class ObjectRef
{
private:
ServerActiveObject *m_object;
static const char className[];
static const luaL_reg methods[];
public:
static ObjectRef *checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(ObjectRef**)ud; // unbox pointer
}
static ServerActiveObject* getobject(ObjectRef *ref)
{
ServerActiveObject *co = ref->m_object;
return co;
}
private:
static LuaEntitySAO* getluaobject(ObjectRef *ref)
{
ServerActiveObject *obj = getobject(ref);
if(obj == NULL)
return NULL;
if(obj->getType() != ACTIVEOBJECT_TYPE_LUAENTITY)
return NULL;
return (LuaEntitySAO*)obj;
}
static PlayerSAO* getplayersao(ObjectRef *ref)
{
ServerActiveObject *obj = getobject(ref);
if(obj == NULL)
return NULL;
if(obj->getType() != ACTIVEOBJECT_TYPE_PLAYER)
return NULL;
return (PlayerSAO*)obj;
}
static Player* getplayer(ObjectRef *ref)
{
PlayerSAO *playersao = getplayersao(ref);
if(playersao == NULL)
return NULL;
return playersao->getPlayer();
}
// Exported functions
// garbage collector
static int gc_object(lua_State *L) {
ObjectRef *o = *(ObjectRef **)(lua_touserdata(L, 1));
//infostream<<"ObjectRef::gc_object: o="<<o<<std::endl;
delete o;
return 0;
}
// remove(self)
static int l_remove(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
verbosestream<<"ObjectRef::l_remove(): id="<<co->getId()<<std::endl;
co->m_removed = true;
return 0;
}
// getpos(self)
// returns: {x=num, y=num, z=num}
static int l_getpos(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
v3f pos = co->getBasePosition() / BS;
lua_newtable(L);
lua_pushnumber(L, pos.X);
lua_setfield(L, -2, "x");
lua_pushnumber(L, pos.Y);
lua_setfield(L, -2, "y");
lua_pushnumber(L, pos.Z);
lua_setfield(L, -2, "z");
return 1;
}
// setpos(self, pos)
static int l_setpos(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
//LuaEntitySAO *co = getluaobject(ref);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// pos
v3f pos = checkFloatPos(L, 2);
// Do it
co->setPos(pos);
return 0;
}
// moveto(self, pos, continuous=false)
static int l_moveto(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
//LuaEntitySAO *co = getluaobject(ref);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// pos
v3f pos = checkFloatPos(L, 2);
// continuous
bool continuous = lua_toboolean(L, 3);
// Do it
co->moveTo(pos, continuous);
return 0;
}
// punch(self, puncher, time_from_last_punch, tool_capabilities, dir)
static int l_punch(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ObjectRef *puncher_ref = checkobject(L, 2);
ServerActiveObject *co = getobject(ref);
ServerActiveObject *puncher = getobject(puncher_ref);
if(co == NULL) return 0;
if(puncher == NULL) return 0;
v3f dir;
if(lua_type(L, 5) != LUA_TTABLE)
dir = co->getBasePosition() - puncher->getBasePosition();
else
dir = read_v3f(L, 5);
float time_from_last_punch = 1000000;
if(lua_isnumber(L, 3))
time_from_last_punch = lua_tonumber(L, 3);
ToolCapabilities toolcap = read_tool_capabilities(L, 4);
dir.normalize();
// Do it
co->punch(dir, &toolcap, puncher, time_from_last_punch);
return 0;
}
// right_click(self, clicker); clicker = an another ObjectRef
static int l_right_click(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ObjectRef *ref2 = checkobject(L, 2);
ServerActiveObject *co = getobject(ref);
ServerActiveObject *co2 = getobject(ref2);
if(co == NULL) return 0;
if(co2 == NULL) return 0;
// Do it
co->rightClick(co2);
return 0;
}
// set_hp(self, hp)
// hp = number of hitpoints (2 * number of hearts)
// returns: nil
static int l_set_hp(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
luaL_checknumber(L, 2);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
int hp = lua_tonumber(L, 2);
/*infostream<<"ObjectRef::l_set_hp(): id="<<co->getId()
<<" hp="<<hp<<std::endl;*/
// Do it
co->setHP(hp);
// Return
return 0;
}
// get_hp(self)
// returns: number of hitpoints (2 * number of hearts)
// 0 if not applicable to this type of object
static int l_get_hp(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL){
// Default hp is 1
lua_pushnumber(L, 1);
return 1;
}
int hp = co->getHP();
/*infostream<<"ObjectRef::l_get_hp(): id="<<co->getId()
<<" hp="<<hp<<std::endl;*/
// Return
lua_pushnumber(L, hp);
return 1;
}
// get_inventory(self)
static int l_get_inventory(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
InventoryLocation loc = co->getInventoryLocation();
if(get_server(L)->getInventory(loc) != NULL)
InvRef::create(L, loc);
else
lua_pushnil(L); // An object may have no inventory (nil)
return 1;
}
// get_wield_list(self)
static int l_get_wield_list(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
lua_pushstring(L, co->getWieldList().c_str());
return 1;
}
// get_wield_index(self)
static int l_get_wield_index(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
lua_pushinteger(L, co->getWieldIndex() + 1);
return 1;
}
// get_wielded_item(self)
static int l_get_wielded_item(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL){
// Empty ItemStack
LuaItemStack::create(L, ItemStack());
return 1;
}
// Do it
LuaItemStack::create(L, co->getWieldedItem());
return 1;
}
// set_wielded_item(self, itemstack or itemstring or table or nil)
static int l_set_wielded_item(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
ItemStack item = read_item(L, 2);
bool success = co->setWieldedItem(item);
lua_pushboolean(L, success);
return 1;
}
// set_armor_groups(self, groups)
static int l_set_armor_groups(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
ItemGroupList groups;
read_groups(L, 2, groups);
co->setArmorGroups(groups);
return 0;
}
// set_animation(self, frame_range, frame_speed, frame_blend)
static int l_set_animation(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
v2f frames = v2f(1, 1);
if(!lua_isnil(L, 2))
frames = read_v2f(L, 2);
float frame_speed = 15;
if(!lua_isnil(L, 3))
frame_speed = lua_tonumber(L, 3);
float frame_blend = 0;
if(!lua_isnil(L, 4))
frame_blend = lua_tonumber(L, 4);
co->setAnimation(frames, frame_speed, frame_blend);
return 0;
}
// set_bone_position(self, std::string bone, v3f position, v3f rotation)
static int l_set_bone_position(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
std::string bone = "";
if(!lua_isnil(L, 2))
bone = lua_tostring(L, 2);
v3f position = v3f(0, 0, 0);
if(!lua_isnil(L, 3))
position = read_v3f(L, 3);
v3f rotation = v3f(0, 0, 0);
if(!lua_isnil(L, 4))
rotation = read_v3f(L, 4);
co->setBonePosition(bone, position, rotation);
return 0;
}
// set_attach(self, parent, bone, position, rotation)
static int l_set_attach(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ObjectRef *parent_ref = checkobject(L, 2);
ServerActiveObject *co = getobject(ref);
ServerActiveObject *parent = getobject(parent_ref);
if(co == NULL) return 0;
if(parent == NULL) return 0;
// Do it
std::string bone = "";
if(!lua_isnil(L, 3))
bone = lua_tostring(L, 3);
v3f position = v3f(0, 0, 0);
if(!lua_isnil(L, 4))
position = read_v3f(L, 4);
v3f rotation = v3f(0, 0, 0);
if(!lua_isnil(L, 5))
rotation = read_v3f(L, 5);
co->setAttachment(parent->getId(), bone, position, rotation);
return 0;
}
// set_detach(self)
static int l_set_detach(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
// Do it
co->setAttachment(0, "", v3f(0,0,0), v3f(0,0,0));
return 0;
}
// set_properties(self, properties)
static int l_set_properties(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
ServerActiveObject *co = getobject(ref);
if(co == NULL) return 0;
ObjectProperties *prop = co->accessObjectProperties();
if(!prop)
return 0;
read_object_properties(L, 2, prop);
co->notifyObjectPropertiesModified();
return 0;
}
/* LuaEntitySAO-only */
// setvelocity(self, {x=num, y=num, z=num})
static int l_setvelocity(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
v3f pos = checkFloatPos(L, 2);
// Do it
co->setVelocity(pos);
return 0;
}
// getvelocity(self)
static int l_getvelocity(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// Do it
v3f v = co->getVelocity();
pushFloatPos(L, v);
return 1;
}
// setacceleration(self, {x=num, y=num, z=num})
static int l_setacceleration(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// pos
v3f pos = checkFloatPos(L, 2);
// Do it
co->setAcceleration(pos);
return 0;
}
// getacceleration(self)
static int l_getacceleration(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// Do it
v3f v = co->getAcceleration();
pushFloatPos(L, v);
return 1;
}
// setyaw(self, radians)
static int l_setyaw(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
float yaw = luaL_checknumber(L, 2) * core::RADTODEG;
// Do it
co->setYaw(yaw);
return 0;
}
// getyaw(self)
static int l_getyaw(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// Do it
float yaw = co->getYaw() * core::DEGTORAD;
lua_pushnumber(L, yaw);
return 1;
}
// settexturemod(self, mod)
static int l_settexturemod(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// Do it
std::string mod = luaL_checkstring(L, 2);
co->setTextureMod(mod);
return 0;
}
// setsprite(self, p={x=0,y=0}, num_frames=1, framelength=0.2,
// select_horiz_by_yawpitch=false)
static int l_setsprite(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// Do it
v2s16 p(0,0);
if(!lua_isnil(L, 2))
p = read_v2s16(L, 2);
int num_frames = 1;
if(!lua_isnil(L, 3))
num_frames = lua_tonumber(L, 3);
float framelength = 0.2;
if(!lua_isnil(L, 4))
framelength = lua_tonumber(L, 4);
bool select_horiz_by_yawpitch = false;
if(!lua_isnil(L, 5))
select_horiz_by_yawpitch = lua_toboolean(L, 5);
co->setSprite(p, num_frames, framelength, select_horiz_by_yawpitch);
return 0;
}
// DEPRECATED
// get_entity_name(self)
static int l_get_entity_name(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// Do it
std::string name = co->getName();
lua_pushstring(L, name.c_str());
return 1;
}
// get_luaentity(self)
static int l_get_luaentity(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
LuaEntitySAO *co = getluaobject(ref);
if(co == NULL) return 0;
// Do it
luaentity_get(L, co->getId());
return 1;
}
/* Player-only */
// is_player(self)
static int l_is_player(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
lua_pushboolean(L, (player != NULL));
return 1;
}
// get_player_name(self)
static int l_get_player_name(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL){
lua_pushlstring(L, "", 0);
return 1;
}
// Do it
lua_pushstring(L, player->getName());
return 1;
}
// get_look_dir(self)
static int l_get_look_dir(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL) return 0;
// Do it
float pitch = player->getRadPitch();
float yaw = player->getRadYaw();
v3f v(cos(pitch)*cos(yaw), sin(pitch), cos(pitch)*sin(yaw));
push_v3f(L, v);
return 1;
}
// get_look_pitch(self)
static int l_get_look_pitch(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL) return 0;
// Do it
lua_pushnumber(L, player->getRadPitch());
return 1;
}
// get_look_yaw(self)
static int l_get_look_yaw(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL) return 0;
// Do it
lua_pushnumber(L, player->getRadYaw());
return 1;
}
// set_inventory_formspec(self, formspec)
static int l_set_inventory_formspec(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL) return 0;
std::string formspec = luaL_checkstring(L, 2);
player->inventory_formspec = formspec;
get_server(L)->reportInventoryFormspecModified(player->getName());
lua_pushboolean(L, true);
return 1;
}
// get_inventory_formspec(self) -> formspec
static int l_get_inventory_formspec(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL) return 0;
std::string formspec = player->inventory_formspec;
lua_pushlstring(L, formspec.c_str(), formspec.size());
return 1;
}
// get_player_control(self)
static int l_get_player_control(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL){
lua_pushlstring(L, "", 0);
return 1;
}
// Do it
PlayerControl control = player->getPlayerControl();
lua_newtable(L);
lua_pushboolean(L, control.up);
lua_setfield(L, -2, "up");
lua_pushboolean(L, control.down);
lua_setfield(L, -2, "down");
lua_pushboolean(L, control.left);
lua_setfield(L, -2, "left");
lua_pushboolean(L, control.right);
lua_setfield(L, -2, "right");
lua_pushboolean(L, control.jump);
lua_setfield(L, -2, "jump");
lua_pushboolean(L, control.aux1);
lua_setfield(L, -2, "aux1");
lua_pushboolean(L, control.sneak);
lua_setfield(L, -2, "sneak");
lua_pushboolean(L, control.LMB);
lua_setfield(L, -2, "LMB");
lua_pushboolean(L, control.RMB);
lua_setfield(L, -2, "RMB");
return 1;
}
// get_player_control_bits(self)
static int l_get_player_control_bits(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
Player *player = getplayer(ref);
if(player == NULL){
lua_pushlstring(L, "", 0);
return 1;
}
// Do it
lua_pushnumber(L, player->keyPressed);
return 1;
}
public:
ObjectRef(ServerActiveObject *object):
m_object(object)
{
//infostream<<"ObjectRef created for id="<<m_object->getId()<<std::endl;
}
~ObjectRef()
{
/*if(m_object)
infostream<<"ObjectRef destructing for id="
<<m_object->getId()<<std::endl;
else
infostream<<"ObjectRef destructing for id=unknown"<<std::endl;*/
}
// Creates an ObjectRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
static void create(lua_State *L, ServerActiveObject *object)
{
ObjectRef *o = new ObjectRef(object);
//infostream<<"ObjectRef::create: o="<<o<<std::endl;
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
}
static void set_null(lua_State *L)
{
ObjectRef *o = checkobject(L, -1);
o->m_object = NULL;
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Cannot be created from Lua
//lua_register(L, className, create_object);
}
};
const char ObjectRef::className[] = "ObjectRef";
const luaL_reg ObjectRef::methods[] = {
// ServerActiveObject
method(ObjectRef, remove),
method(ObjectRef, getpos),
method(ObjectRef, setpos),
method(ObjectRef, moveto),
method(ObjectRef, punch),
method(ObjectRef, right_click),
method(ObjectRef, set_hp),
method(ObjectRef, get_hp),
method(ObjectRef, get_inventory),
method(ObjectRef, get_wield_list),
method(ObjectRef, get_wield_index),
method(ObjectRef, get_wielded_item),
method(ObjectRef, set_wielded_item),
method(ObjectRef, set_armor_groups),
method(ObjectRef, set_animation),
method(ObjectRef, set_bone_position),
method(ObjectRef, set_attach),
method(ObjectRef, set_detach),
method(ObjectRef, set_properties),
// LuaEntitySAO-only
method(ObjectRef, setvelocity),
method(ObjectRef, getvelocity),
method(ObjectRef, setacceleration),
method(ObjectRef, getacceleration),
method(ObjectRef, setyaw),
method(ObjectRef, getyaw),
method(ObjectRef, settexturemod),
method(ObjectRef, setsprite),
method(ObjectRef, get_entity_name),
method(ObjectRef, get_luaentity),
// Player-only
method(ObjectRef, is_player),
method(ObjectRef, get_player_name),
method(ObjectRef, get_look_dir),
method(ObjectRef, get_look_pitch),
method(ObjectRef, get_look_yaw),
method(ObjectRef, set_inventory_formspec),
method(ObjectRef, get_inventory_formspec),
method(ObjectRef, get_player_control),
method(ObjectRef, get_player_control_bits),
{0,0}
};
// Creates a new anonymous reference if cobj=NULL or id=0
static void objectref_get_or_create(lua_State *L,
ServerActiveObject *cobj)
{
if(cobj == NULL || cobj->getId() == 0){
ObjectRef::create(L, cobj);
} else {
objectref_get(L, cobj->getId());
}
}
/*
PerlinNoise
*/
class LuaPerlinNoise
{
private:
int seed;
int octaves;
float persistence;
float scale;
static const char className[];
static const luaL_reg methods[];
// Exported functions
// garbage collector
static int gc_object(lua_State *L)
{
LuaPerlinNoise *o = *(LuaPerlinNoise **)(lua_touserdata(L, 1));
delete o;
return 0;
}
static int l_get2d(lua_State *L)
{
LuaPerlinNoise *o = checkobject(L, 1);
v2f pos2d = read_v2f(L,2);
lua_Number val = noise2d_perlin(pos2d.X/o->scale, pos2d.Y/o->scale, o->seed, o->octaves, o->persistence);
lua_pushnumber(L, val);
return 1;
}
static int l_get3d(lua_State *L)
{
LuaPerlinNoise *o = checkobject(L, 1);
v3f pos3d = read_v3f(L,2);
lua_Number val = noise3d_perlin(pos3d.X/o->scale, pos3d.Y/o->scale, pos3d.Z/o->scale, o->seed, o->octaves, o->persistence);
lua_pushnumber(L, val);
return 1;
}
public:
LuaPerlinNoise(int a_seed, int a_octaves, float a_persistence,
float a_scale):
seed(a_seed),
octaves(a_octaves),
persistence(a_persistence),
scale(a_scale)
{
}
~LuaPerlinNoise()
{
}
// LuaPerlinNoise(seed, octaves, persistence, scale)
// Creates an LuaPerlinNoise and leaves it on top of stack
static int create_object(lua_State *L)
{
int seed = luaL_checkint(L, 1);
int octaves = luaL_checkint(L, 2);
float persistence = luaL_checknumber(L, 3);
float scale = luaL_checknumber(L, 4);
LuaPerlinNoise *o = new LuaPerlinNoise(seed, octaves, persistence, scale);
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
return 1;
}
static LuaPerlinNoise* checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(LuaPerlinNoise**)ud; // unbox pointer
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Can be created from Lua (PerlinNoise(seed, octaves, persistence)
lua_register(L, className, create_object);
}
};
const char LuaPerlinNoise::className[] = "PerlinNoise";
const luaL_reg LuaPerlinNoise::methods[] = {
method(LuaPerlinNoise, get2d),
method(LuaPerlinNoise, get3d),
{0,0}
};
/*
NodeTimerRef
*/
class NodeTimerRef
{
private:
v3s16 m_p;
ServerEnvironment *m_env;
static const char className[];
static const luaL_reg methods[];
static int gc_object(lua_State *L) {
NodeTimerRef *o = *(NodeTimerRef **)(lua_touserdata(L, 1));
delete o;
return 0;
}
static NodeTimerRef *checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(NodeTimerRef**)ud; // unbox pointer
}
static int l_set(lua_State *L)
{
NodeTimerRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
f32 t = luaL_checknumber(L,2);
f32 e = luaL_checknumber(L,3);
env->getMap().setNodeTimer(o->m_p,NodeTimer(t,e));
return 0;
}
static int l_start(lua_State *L)
{
NodeTimerRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
f32 t = luaL_checknumber(L,2);
env->getMap().setNodeTimer(o->m_p,NodeTimer(t,0));
return 0;
}
static int l_stop(lua_State *L)
{
NodeTimerRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
env->getMap().removeNodeTimer(o->m_p);
return 0;
}
static int l_is_started(lua_State *L)
{
NodeTimerRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
NodeTimer t = env->getMap().getNodeTimer(o->m_p);
lua_pushboolean(L,(t.timeout != 0));
return 1;
}
static int l_get_timeout(lua_State *L)
{
NodeTimerRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
NodeTimer t = env->getMap().getNodeTimer(o->m_p);
lua_pushnumber(L,t.timeout);
return 1;
}
static int l_get_elapsed(lua_State *L)
{
NodeTimerRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
NodeTimer t = env->getMap().getNodeTimer(o->m_p);
lua_pushnumber(L,t.elapsed);
return 1;
}
public:
NodeTimerRef(v3s16 p, ServerEnvironment *env):
m_p(p),
m_env(env)
{
}
~NodeTimerRef()
{
}
// Creates an NodeTimerRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
static void create(lua_State *L, v3s16 p, ServerEnvironment *env)
{
NodeTimerRef *o = new NodeTimerRef(p, env);
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
}
static void set_null(lua_State *L)
{
NodeTimerRef *o = checkobject(L, -1);
o->m_env = NULL;
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Cannot be created from Lua
//lua_register(L, className, create_object);
}
};
const char NodeTimerRef::className[] = "NodeTimerRef";
const luaL_reg NodeTimerRef::methods[] = {
method(NodeTimerRef, start),
method(NodeTimerRef, set),
method(NodeTimerRef, stop),
method(NodeTimerRef, is_started),
method(NodeTimerRef, get_timeout),
method(NodeTimerRef, get_elapsed),
{0,0}
};
/*
EnvRef
*/
class EnvRef
{
private:
ServerEnvironment *m_env;
static const char className[];
static const luaL_reg methods[];
static int gc_object(lua_State *L) {
EnvRef *o = *(EnvRef **)(lua_touserdata(L, 1));
delete o;
return 0;
}
static EnvRef *checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(EnvRef**)ud; // unbox pointer
}
// Exported functions
// EnvRef:set_node(pos, node)
// pos = {x=num, y=num, z=num}
static int l_set_node(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
INodeDefManager *ndef = env->getGameDef()->ndef();
// parameters
v3s16 pos = read_v3s16(L, 2);
MapNode n = readnode(L, 3, ndef);
// Do it
bool succeeded = env->setNode(pos, n);
lua_pushboolean(L, succeeded);
return 1;
}
static int l_add_node(lua_State *L)
{
return l_set_node(L);
}
// EnvRef:remove_node(pos)
// pos = {x=num, y=num, z=num}
static int l_remove_node(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
INodeDefManager *ndef = env->getGameDef()->ndef();
// parameters
v3s16 pos = read_v3s16(L, 2);
// Do it
bool succeeded = env->removeNode(pos);
lua_pushboolean(L, succeeded);
return 1;
}
// EnvRef:get_node(pos)
// pos = {x=num, y=num, z=num}
static int l_get_node(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// pos
v3s16 pos = read_v3s16(L, 2);
// Do it
MapNode n = env->getMap().getNodeNoEx(pos);
// Return node
pushnode(L, n, env->getGameDef()->ndef());
return 1;
}
// EnvRef:get_node_or_nil(pos)
// pos = {x=num, y=num, z=num}
static int l_get_node_or_nil(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// pos
v3s16 pos = read_v3s16(L, 2);
// Do it
try{
MapNode n = env->getMap().getNode(pos);
// Return node
pushnode(L, n, env->getGameDef()->ndef());
return 1;
} catch(InvalidPositionException &e)
{
lua_pushnil(L);
return 1;
}
}
// EnvRef:get_node_light(pos, timeofday)
// pos = {x=num, y=num, z=num}
// timeofday: nil = current time, 0 = night, 0.5 = day
static int l_get_node_light(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
v3s16 pos = read_v3s16(L, 2);
u32 time_of_day = env->getTimeOfDay();
if(lua_isnumber(L, 3))
time_of_day = 24000.0 * lua_tonumber(L, 3);
time_of_day %= 24000;
u32 dnr = time_to_daynight_ratio(time_of_day, true);
MapNode n = env->getMap().getNodeNoEx(pos);
try{
MapNode n = env->getMap().getNode(pos);
INodeDefManager *ndef = env->getGameDef()->ndef();
lua_pushinteger(L, n.getLightBlend(dnr, ndef));
return 1;
} catch(InvalidPositionException &e)
{
lua_pushnil(L);
return 1;
}
}
// EnvRef:place_node(pos, node)
// pos = {x=num, y=num, z=num}
static int l_place_node(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
v3s16 pos = read_v3s16(L, 2);
MapNode n = readnode(L, 3, env->getGameDef()->ndef());
// Don't attempt to load non-loaded area as of now
MapNode n_old = env->getMap().getNodeNoEx(pos);
if(n_old.getContent() == CONTENT_IGNORE){
lua_pushboolean(L, false);
return 1;
}
// Create item to place
INodeDefManager *ndef = get_server(L)->ndef();
IItemDefManager *idef = get_server(L)->idef();
ItemStack item(ndef->get(n).name, 1, 0, "", idef);
// Make pointed position
PointedThing pointed;
pointed.type = POINTEDTHING_NODE;
pointed.node_abovesurface = pos;
pointed.node_undersurface = pos + v3s16(0,-1,0);
// Place it with a NULL placer (appears in Lua as a non-functional
// ObjectRef)
bool success = scriptapi_item_on_place(L, item, NULL, pointed);
lua_pushboolean(L, success);
return 1;
}
// EnvRef:dig_node(pos)
// pos = {x=num, y=num, z=num}
static int l_dig_node(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
v3s16 pos = read_v3s16(L, 2);
// Don't attempt to load non-loaded area as of now
MapNode n = env->getMap().getNodeNoEx(pos);
if(n.getContent() == CONTENT_IGNORE){
lua_pushboolean(L, false);
return 1;
}
// Dig it out with a NULL digger (appears in Lua as a
// non-functional ObjectRef)
bool success = scriptapi_node_on_dig(L, pos, n, NULL);
lua_pushboolean(L, success);
return 1;
}
// EnvRef:punch_node(pos)
// pos = {x=num, y=num, z=num}
static int l_punch_node(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
v3s16 pos = read_v3s16(L, 2);
// Don't attempt to load non-loaded area as of now
MapNode n = env->getMap().getNodeNoEx(pos);
if(n.getContent() == CONTENT_IGNORE){
lua_pushboolean(L, false);
return 1;
}
// Punch it with a NULL puncher (appears in Lua as a non-functional
// ObjectRef)
bool success = scriptapi_node_on_punch(L, pos, n, NULL);
lua_pushboolean(L, success);
return 1;
}
// EnvRef:get_meta(pos)
static int l_get_meta(lua_State *L)
{
//infostream<<"EnvRef::l_get_meta()"<<std::endl;
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
v3s16 p = read_v3s16(L, 2);
NodeMetaRef::create(L, p, env);
return 1;
}
// EnvRef:get_node_timer(pos)
static int l_get_node_timer(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
v3s16 p = read_v3s16(L, 2);
NodeTimerRef::create(L, p, env);
return 1;
}
// EnvRef:add_entity(pos, entityname) -> ObjectRef or nil
// pos = {x=num, y=num, z=num}
static int l_add_entity(lua_State *L)
{
//infostream<<"EnvRef::l_add_entity()"<<std::endl;
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// pos
v3f pos = checkFloatPos(L, 2);
// content
const char *name = luaL_checkstring(L, 3);
// Do it
ServerActiveObject *obj = new LuaEntitySAO(env, pos, name, "");
int objectid = env->addActiveObject(obj);
// If failed to add, return nothing (reads as nil)
if(objectid == 0)
return 0;
// Return ObjectRef
objectref_get_or_create(L, obj);
return 1;
}
// EnvRef:add_item(pos, itemstack or itemstring or table) -> ObjectRef or nil
// pos = {x=num, y=num, z=num}
static int l_add_item(lua_State *L)
{
//infostream<<"EnvRef::l_add_item()"<<std::endl;
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// pos
v3f pos = checkFloatPos(L, 2);
// item
ItemStack item = read_item(L, 3);
if(item.empty() || !item.isKnown(get_server(L)->idef()))
return 0;
// Use minetest.spawn_item to spawn a __builtin:item
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "spawn_item");
if(lua_isnil(L, -1))
return 0;
lua_pushvalue(L, 2);
lua_pushstring(L, item.getItemString().c_str());
if(lua_pcall(L, 2, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
return 1;
/*lua_pushvalue(L, 1);
lua_pushstring(L, "__builtin:item");
lua_pushstring(L, item.getItemString().c_str());
return l_add_entity(L);*/
/*// Do it
ServerActiveObject *obj = createItemSAO(env, pos, item.getItemString());
int objectid = env->addActiveObject(obj);
// If failed to add, return nothing (reads as nil)
if(objectid == 0)
return 0;
// Return ObjectRef
objectref_get_or_create(L, obj);
return 1;*/
}
// EnvRef:add_rat(pos)
// pos = {x=num, y=num, z=num}
static int l_add_rat(lua_State *L)
{
infostream<<"EnvRef::l_add_rat(): C++ mobs have been removed."
<<" Doing nothing."<<std::endl;
return 0;
}
// EnvRef:add_firefly(pos)
// pos = {x=num, y=num, z=num}
static int l_add_firefly(lua_State *L)
{
infostream<<"EnvRef::l_add_firefly(): C++ mobs have been removed."
<<" Doing nothing."<<std::endl;
return 0;
}
// EnvRef:get_player_by_name(name)
static int l_get_player_by_name(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
const char *name = luaL_checkstring(L, 2);
Player *player = env->getPlayer(name);
if(player == NULL){
lua_pushnil(L);
return 1;
}
PlayerSAO *sao = player->getPlayerSAO();
if(sao == NULL){
lua_pushnil(L);
return 1;
}
// Put player on stack
objectref_get_or_create(L, sao);
return 1;
}
// EnvRef:get_objects_inside_radius(pos, radius)
static int l_get_objects_inside_radius(lua_State *L)
{
// Get the table insert function
lua_getglobal(L, "table");
lua_getfield(L, -1, "insert");
int table_insert = lua_gettop(L);
// Get environemnt
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
v3f pos = checkFloatPos(L, 2);
float radius = luaL_checknumber(L, 3) * BS;
std::set<u16> ids = env->getObjectsInsideRadius(pos, radius);
lua_newtable(L);
int table = lua_gettop(L);
for(std::set<u16>::const_iterator
i = ids.begin(); i != ids.end(); i++){
ServerActiveObject *obj = env->getActiveObject(*i);
// Insert object reference into table
lua_pushvalue(L, table_insert);
lua_pushvalue(L, table);
objectref_get_or_create(L, obj);
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
return 1;
}
// EnvRef:set_timeofday(val)
// val = 0...1
static int l_set_timeofday(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
float timeofday_f = luaL_checknumber(L, 2);
assert(timeofday_f >= 0.0 && timeofday_f <= 1.0);
int timeofday_mh = (int)(timeofday_f * 24000.0);
// This should be set directly in the environment but currently
// such changes aren't immediately sent to the clients, so call
// the server instead.
//env->setTimeOfDay(timeofday_mh);
get_server(L)->setTimeOfDay(timeofday_mh);
return 0;
}
// EnvRef:get_timeofday() -> 0...1
static int l_get_timeofday(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
int timeofday_mh = env->getTimeOfDay();
float timeofday_f = (float)timeofday_mh / 24000.0;
lua_pushnumber(L, timeofday_f);
return 1;
}
// EnvRef:find_node_near(pos, radius, nodenames) -> pos or nil
// nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
static int l_find_node_near(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
INodeDefManager *ndef = get_server(L)->ndef();
v3s16 pos = read_v3s16(L, 2);
int radius = luaL_checkinteger(L, 3);
std::set<content_t> filter;
if(lua_istable(L, 4)){
int table = 4;
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TSTRING);
ndef->getIds(lua_tostring(L, -1), filter);
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else if(lua_isstring(L, 4)){
ndef->getIds(lua_tostring(L, 4), filter);
}
for(int d=1; d<=radius; d++){
core::list<v3s16> list;
getFacePositions(list, d);
for(core::list<v3s16>::Iterator i = list.begin();
i != list.end(); i++){
v3s16 p = pos + (*i);
content_t c = env->getMap().getNodeNoEx(p).getContent();
if(filter.count(c) != 0){
push_v3s16(L, p);
return 1;
}
}
}
return 0;
}
// EnvRef:find_nodes_in_area(minp, maxp, nodenames) -> list of positions
// nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
static int l_find_nodes_in_area(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
INodeDefManager *ndef = get_server(L)->ndef();
v3s16 minp = read_v3s16(L, 2);
v3s16 maxp = read_v3s16(L, 3);
std::set<content_t> filter;
if(lua_istable(L, 4)){
int table = 4;
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TSTRING);
ndef->getIds(lua_tostring(L, -1), filter);
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else if(lua_isstring(L, 4)){
ndef->getIds(lua_tostring(L, 4), filter);
}
// Get the table insert function
lua_getglobal(L, "table");
lua_getfield(L, -1, "insert");
int table_insert = lua_gettop(L);
lua_newtable(L);
int table = lua_gettop(L);
for(s16 x=minp.X; x<=maxp.X; x++)
for(s16 y=minp.Y; y<=maxp.Y; y++)
for(s16 z=minp.Z; z<=maxp.Z; z++)
{
v3s16 p(x,y,z);
content_t c = env->getMap().getNodeNoEx(p).getContent();
if(filter.count(c) != 0){
lua_pushvalue(L, table_insert);
lua_pushvalue(L, table);
push_v3s16(L, p);
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
}
return 1;
}
// EnvRef:get_perlin(seeddiff, octaves, persistence, scale)
// returns world-specific PerlinNoise
static int l_get_perlin(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
int seeddiff = luaL_checkint(L, 2);
int octaves = luaL_checkint(L, 3);
float persistence = luaL_checknumber(L, 4);
float scale = luaL_checknumber(L, 5);
LuaPerlinNoise *n = new LuaPerlinNoise(seeddiff + int(env->getServerMap().getSeed()), octaves, persistence, scale);
*(void **)(lua_newuserdata(L, sizeof(void *))) = n;
luaL_getmetatable(L, "PerlinNoise");
lua_setmetatable(L, -2);
return 1;
}
// EnvRef:clear_objects()
// clear all objects in the environment
static int l_clear_objects(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
o->m_env->clearAllObjects();
return 0;
}
static int l_spawn_tree(lua_State *L)
{
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
v3s16 p0 = read_v3s16(L, 2);
treegen::TreeDef tree_def;
std::string trunk,leaves,fruit;
INodeDefManager *ndef = env->getGameDef()->ndef();
if(lua_istable(L, 3))
{
getstringfield(L, 3, "axiom", tree_def.initial_axiom);
getstringfield(L, 3, "rules_a", tree_def.rules_a);
getstringfield(L, 3, "rules_b", tree_def.rules_b);
getstringfield(L, 3, "rules_c", tree_def.rules_c);
getstringfield(L, 3, "rules_d", tree_def.rules_d);
getstringfield(L, 3, "trunk", trunk);
tree_def.trunknode=ndef->getId(trunk);
getstringfield(L, 3, "leaves", leaves);
tree_def.leavesnode=ndef->getId(leaves);
tree_def.leaves2_chance=0;
getstringfield(L, 3, "leaves2", leaves);
if (leaves !="")
{
tree_def.leaves2node=ndef->getId(leaves);
getintfield(L, 3, "leaves2_chance", tree_def.leaves2_chance);
}
getintfield(L, 3, "angle", tree_def.angle);
getintfield(L, 3, "iterations", tree_def.iterations);
getintfield(L, 3, "random_level", tree_def.iterations_random_level);
getstringfield(L, 3, "trunk_type", tree_def.trunk_type);
getboolfield(L, 3, "thin_branches", tree_def.thin_branches);
tree_def.fruit_chance=0;
getstringfield(L, 3, "fruit", fruit);
if (fruit != "")
{
tree_def.fruitnode=ndef->getId(fruit);
getintfield(L, 3, "fruit_chance",tree_def.fruit_chance);
}
}
else
return 0;
treegen::spawn_ltree (env, p0, ndef, tree_def);
return 1;
}
public:
EnvRef(ServerEnvironment *env):
m_env(env)
{
//infostream<<"EnvRef created"<<std::endl;
}
~EnvRef()
{
//infostream<<"EnvRef destructing"<<std::endl;
}
// Creates an EnvRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
static void create(lua_State *L, ServerEnvironment *env)
{
EnvRef *o = new EnvRef(env);
//infostream<<"EnvRef::create: o="<<o<<std::endl;
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
}
static void set_null(lua_State *L)
{
EnvRef *o = checkobject(L, -1);
o->m_env = NULL;
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Cannot be created from Lua
//lua_register(L, className, create_object);
}
};
const char EnvRef::className[] = "EnvRef";
const luaL_reg EnvRef::methods[] = {
method(EnvRef, set_node),
method(EnvRef, add_node),
method(EnvRef, remove_node),
method(EnvRef, get_node),
method(EnvRef, get_node_or_nil),
method(EnvRef, get_node_light),
method(EnvRef, place_node),
method(EnvRef, dig_node),
method(EnvRef, punch_node),
method(EnvRef, add_entity),
method(EnvRef, add_item),
method(EnvRef, add_rat),
method(EnvRef, add_firefly),
method(EnvRef, get_meta),
method(EnvRef, get_node_timer),
method(EnvRef, get_player_by_name),
method(EnvRef, get_objects_inside_radius),
method(EnvRef, set_timeofday),
method(EnvRef, get_timeofday),
method(EnvRef, find_node_near),
method(EnvRef, find_nodes_in_area),
method(EnvRef, get_perlin),
//method{EnvRef, get_perlin_map_2d},
//method{EnvRef, get_perlin_map_3d},
method(EnvRef, clear_objects),
method(EnvRef, spawn_tree),
{0,0}
};
/*
LuaPseudoRandom
*/
class LuaPseudoRandom
{
private:
PseudoRandom m_pseudo;
static const char className[];
static const luaL_reg methods[];
// Exported functions
// garbage collector
static int gc_object(lua_State *L)
{
LuaPseudoRandom *o = *(LuaPseudoRandom **)(lua_touserdata(L, 1));
delete o;
return 0;
}
// next(self, min=0, max=32767) -> get next value
static int l_next(lua_State *L)
{
LuaPseudoRandom *o = checkobject(L, 1);
int min = 0;
int max = 32767;
lua_settop(L, 3); // Fill 2 and 3 with nil if they don't exist
if(!lua_isnil(L, 2))
min = luaL_checkinteger(L, 2);
if(!lua_isnil(L, 3))
max = luaL_checkinteger(L, 3);
if(max < min){
errorstream<<"PseudoRandom.next(): max="<<max<<" min="<<min<<std::endl;
throw LuaError(L, "PseudoRandom.next(): max < min");
}
if(max - min != 32767 && max - min > 32767/5)
throw LuaError(L, "PseudoRandom.next() max-min is not 32767 and is > 32768/5. This is disallowed due to the bad random distribution the implementation would otherwise make.");
PseudoRandom &pseudo = o->m_pseudo;
int val = pseudo.next();
val = (val % (max-min+1)) + min;
lua_pushinteger(L, val);
return 1;
}
public:
LuaPseudoRandom(int seed):
m_pseudo(seed)
{
}
~LuaPseudoRandom()
{
}
const PseudoRandom& getItem() const
{
return m_pseudo;
}
PseudoRandom& getItem()
{
return m_pseudo;
}
// LuaPseudoRandom(seed)
// Creates an LuaPseudoRandom and leaves it on top of stack
static int create_object(lua_State *L)
{
int seed = luaL_checknumber(L, 1);
LuaPseudoRandom *o = new LuaPseudoRandom(seed);
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
return 1;
}
static LuaPseudoRandom* checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(LuaPseudoRandom**)ud; // unbox pointer
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Can be created from Lua (LuaPseudoRandom(seed))
lua_register(L, className, create_object);
}
};
const char LuaPseudoRandom::className[] = "PseudoRandom";
const luaL_reg LuaPseudoRandom::methods[] = {
method(LuaPseudoRandom, next),
{0,0}
};
/*
LuaABM
*/
class LuaABM : public ActiveBlockModifier
{
private:
lua_State *m_lua;
int m_id;
std::set<std::string> m_trigger_contents;
std::set<std::string> m_required_neighbors;
float m_trigger_interval;
u32 m_trigger_chance;
public:
LuaABM(lua_State *L, int id,
const std::set<std::string> &trigger_contents,
const std::set<std::string> &required_neighbors,
float trigger_interval, u32 trigger_chance):
m_lua(L),
m_id(id),
m_trigger_contents(trigger_contents),
m_required_neighbors(required_neighbors),
m_trigger_interval(trigger_interval),
m_trigger_chance(trigger_chance)
{
}
virtual std::set<std::string> getTriggerContents()
{
return m_trigger_contents;
}
virtual std::set<std::string> getRequiredNeighbors()
{
return m_required_neighbors;
}
virtual float getTriggerInterval()
{
return m_trigger_interval;
}
virtual u32 getTriggerChance()
{
return m_trigger_chance;
}
virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
u32 active_object_count, u32 active_object_count_wider)
{
lua_State *L = m_lua;
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_abms
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_abms");
luaL_checktype(L, -1, LUA_TTABLE);
int registered_abms = lua_gettop(L);
// Get minetest.registered_abms[m_id]
lua_pushnumber(L, m_id);
lua_gettable(L, registered_abms);
if(lua_isnil(L, -1))
assert(0);
// Call action
luaL_checktype(L, -1, LUA_TTABLE);
lua_getfield(L, -1, "action");
luaL_checktype(L, -1, LUA_TFUNCTION);
push_v3s16(L, p);
pushnode(L, n, env->getGameDef()->ndef());
lua_pushnumber(L, active_object_count);
lua_pushnumber(L, active_object_count_wider);
if(lua_pcall(L, 4, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
};
/*
ServerSoundParams
*/
static void read_server_sound_params(lua_State *L, int index,
ServerSoundParams &params)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
// Clear
params = ServerSoundParams();
if(lua_istable(L, index)){
getfloatfield(L, index, "gain", params.gain);
getstringfield(L, index, "to_player", params.to_player);
lua_getfield(L, index, "pos");
if(!lua_isnil(L, -1)){
v3f p = read_v3f(L, -1)*BS;
params.pos = p;
params.type = ServerSoundParams::SSP_POSITIONAL;
}
lua_pop(L, 1);
lua_getfield(L, index, "object");
if(!lua_isnil(L, -1)){
ObjectRef *ref = ObjectRef::checkobject(L, -1);
ServerActiveObject *sao = ObjectRef::getobject(ref);
if(sao){
params.object = sao->getId();
params.type = ServerSoundParams::SSP_OBJECT;
}
}
lua_pop(L, 1);
params.max_hear_distance = BS*getfloatfield_default(L, index,
"max_hear_distance", params.max_hear_distance/BS);
getboolfield(L, index, "loop", params.loop);
}
}
/*
Global functions
*/
// debug(text)
// Writes a line to dstream
static int l_debug(lua_State *L)
{
std::string text = lua_tostring(L, 1);
dstream << text << std::endl;
return 0;
}
// log([level,] text)
// Writes a line to the logger.
// The one-argument version logs to infostream.
// The two-argument version accept a log level: error, action, info, or verbose.
static int l_log(lua_State *L)
{
std::string text;
LogMessageLevel level = LMT_INFO;
if(lua_isnone(L, 2))
{
text = lua_tostring(L, 1);
}
else
{
std::string levelname = luaL_checkstring(L, 1);
text = luaL_checkstring(L, 2);
if(levelname == "error")
level = LMT_ERROR;
else if(levelname == "action")
level = LMT_ACTION;
else if(levelname == "verbose")
level = LMT_VERBOSE;
}
log_printline(level, text);
return 0;
}
// request_shutdown()
static int l_request_shutdown(lua_State *L)
{
get_server(L)->requestShutdown();
return 0;
}
// get_server_status()
static int l_get_server_status(lua_State *L)
{
lua_pushstring(L, wide_to_narrow(get_server(L)->getStatusString()).c_str());
return 1;
}
// register_biome_groups({frequencies})
static int l_register_biome_groups(lua_State *L)
{
luaL_checktype(L, 1, LUA_TTABLE);
int index = 1;
if (!lua_istable(L, index))
throw LuaError(L, "register_biome_groups: parameter is not a table");
BiomeDefManager *bmgr = get_server(L)->getBiomeDef();
if (!bmgr) {
verbosestream << "register_biome_groups: BiomeDefManager not active" << std::endl;
return 0;
}
lua_pushnil(L);
for (int i = 1; lua_next(L, index) != 0; i++) {
bmgr->addBiomeGroup(lua_tonumber(L, -1));
lua_pop(L, 1);
}
lua_pop(L, 1);
return 0;
}
// register_biome({lots of stuff})
static int l_register_biome(lua_State *L)
{
luaL_checktype(L, 1, LUA_TTABLE);
int index = 1, groupid;
std::string nodename;
IWritableNodeDefManager *ndef = get_server(L)->getWritableNodeDefManager();
BiomeDefManager *bmgr = get_server(L)->getBiomeDef();
if (!bmgr) {
verbosestream << "register_biome: BiomeDefManager not active" << std::endl;
return 0;
}
groupid = getintfield_default(L, index, "group_id", 0);
enum BiomeTerrainType terrain = (BiomeTerrainType)getenumfield(L, index,
"terrain_type", es_BiomeTerrainType, BIOME_TERRAIN_NORMAL);
Biome *b = bmgr->createBiome(terrain);
b->name = getstringfield_default(L, index, "name", "");
if (getstringfield(L, index, "node_top", nodename))
b->n_top = MapNode(ndef->getId(nodename));
else
b->n_top = MapNode(CONTENT_IGNORE);
if (getstringfield(L, index, "node_filler", nodename))
b->n_filler = MapNode(ndef->getId(nodename));
else
b->n_filler = b->n_top;
b->ntopnodes = getintfield_default(L, index, "num_top_nodes", 0);
b->height_min = getintfield_default(L, index, "height_min", 0);
b->height_max = getintfield_default(L, index, "height_max", 0);
b->heat_min = getfloatfield_default(L, index, "heat_min", 0.);
b->heat_max = getfloatfield_default(L, index, "heat_max", 0.);
b->humidity_min = getfloatfield_default(L, index, "humidity_min", 0.);
b->humidity_max = getfloatfield_default(L, index, "humidity_max", 0.);
b->np = new NoiseParams; // should read an entire NoiseParams later on...
getfloatfield(L, index, "scale", b->np->scale);
getfloatfield(L, index, "offset", b->np->offset);
b->groupid = (s8)groupid;
b->flags = 0; //reserved
bmgr->addBiome(b);
verbosestream << "register_biome: " << b->name << std::endl;
return 0;
}
// register_item_raw({lots of stuff})
static int l_register_item_raw(lua_State *L)
{
luaL_checktype(L, 1, LUA_TTABLE);
int table = 1;
// Get the writable item and node definition managers from the server
IWritableItemDefManager *idef =
get_server(L)->getWritableItemDefManager();
IWritableNodeDefManager *ndef =
get_server(L)->getWritableNodeDefManager();
// Check if name is defined
std::string name;
lua_getfield(L, table, "name");
if(lua_isstring(L, -1)){
name = lua_tostring(L, -1);
verbosestream<<"register_item_raw: "<<name<<std::endl;
} else {
throw LuaError(L, "register_item_raw: name is not defined or not a string");
}
// Check if on_use is defined
ItemDefinition def;
// Set a distinctive default value to check if this is set
def.node_placement_prediction = "__default";
// Read the item definition
def = read_item_definition(L, table, def);
// Default to having client-side placement prediction for nodes
// ("" in item definition sets it off)
if(def.node_placement_prediction == "__default"){
if(def.type == ITEM_NODE)
def.node_placement_prediction = name;
else
def.node_placement_prediction = "";
}
// Register item definition
idef->registerItem(def);
// Read the node definition (content features) and register it
if(def.type == ITEM_NODE)
{
ContentFeatures f = read_content_features(L, table);
ndef->set(f.name, f);
}
return 0; /* number of results */
}
// register_alias_raw(name, convert_to_name)
static int l_register_alias_raw(lua_State *L)
{
std::string name = luaL_checkstring(L, 1);
std::string convert_to = luaL_checkstring(L, 2);
// Get the writable item definition manager from the server
IWritableItemDefManager *idef =
get_server(L)->getWritableItemDefManager();
idef->registerAlias(name, convert_to);
return 0; /* number of results */
}
// helper for register_craft
static bool read_craft_recipe_shaped(lua_State *L, int index,
int &width, std::vector<std::string> &recipe)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(!lua_istable(L, index))
return false;
lua_pushnil(L);
int rowcount = 0;
while(lua_next(L, index) != 0){
int colcount = 0;
// key at index -2 and value at index -1
if(!lua_istable(L, -1))
return false;
int table2 = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table2) != 0){
// key at index -2 and value at index -1
if(!lua_isstring(L, -1))
return false;
recipe.push_back(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
colcount++;
}
if(rowcount == 0){
width = colcount;
} else {
if(colcount != width)
return false;
}
// removes value, keeps key for next iteration
lua_pop(L, 1);
rowcount++;
}
return width != 0;
}
// helper for register_craft
static bool read_craft_recipe_shapeless(lua_State *L, int index,
std::vector<std::string> &recipe)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(!lua_istable(L, index))
return false;
lua_pushnil(L);
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
if(!lua_isstring(L, -1))
return false;
recipe.push_back(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
return true;
}
// helper for register_craft
static bool read_craft_replacements(lua_State *L, int index,
CraftReplacements &replacements)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if(!lua_istable(L, index))
return false;
lua_pushnil(L);
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
if(!lua_istable(L, -1))
return false;
lua_rawgeti(L, -1, 1);
if(!lua_isstring(L, -1))
return false;
std::string replace_from = lua_tostring(L, -1);
lua_pop(L, 1);
lua_rawgeti(L, -1, 2);
if(!lua_isstring(L, -1))
return false;
std::string replace_to = lua_tostring(L, -1);
lua_pop(L, 1);
replacements.pairs.push_back(
std::make_pair(replace_from, replace_to));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
return true;
}
// register_craft({output=item, recipe={{item00,item10},{item01,item11}})
static int l_register_craft(lua_State *L)
{
//infostream<<"register_craft"<<std::endl;
luaL_checktype(L, 1, LUA_TTABLE);
int table = 1;
// Get the writable craft definition manager from the server
IWritableCraftDefManager *craftdef =
get_server(L)->getWritableCraftDefManager();
std::string type = getstringfield_default(L, table, "type", "shaped");
/*
CraftDefinitionShaped
*/
if(type == "shaped"){
std::string output = getstringfield_default(L, table, "output", "");
if(output == "")
throw LuaError(L, "Crafting definition is missing an output");
int width = 0;
std::vector<std::string> recipe;
lua_getfield(L, table, "recipe");
if(lua_isnil(L, -1))
throw LuaError(L, "Crafting definition is missing a recipe"
" (output=\"" + output + "\")");
if(!read_craft_recipe_shaped(L, -1, width, recipe))
throw LuaError(L, "Invalid crafting recipe"
" (output=\"" + output + "\")");
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!read_craft_replacements(L, -1, replacements))
throw LuaError(L, "Invalid replacements"
" (output=\"" + output + "\")");
}
CraftDefinition *def = new CraftDefinitionShaped(
output, width, recipe, replacements);
craftdef->registerCraft(def);
}
/*
CraftDefinitionShapeless
*/
else if(type == "shapeless"){
std::string output = getstringfield_default(L, table, "output", "");
if(output == "")
throw LuaError(L, "Crafting definition (shapeless)"
" is missing an output");
std::vector<std::string> recipe;
lua_getfield(L, table, "recipe");
if(lua_isnil(L, -1))
throw LuaError(L, "Crafting definition (shapeless)"
" is missing a recipe"
" (output=\"" + output + "\")");
if(!read_craft_recipe_shapeless(L, -1, recipe))
throw LuaError(L, "Invalid crafting recipe"
" (output=\"" + output + "\")");
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!read_craft_replacements(L, -1, replacements))
throw LuaError(L, "Invalid replacements"
" (output=\"" + output + "\")");
}
CraftDefinition *def = new CraftDefinitionShapeless(
output, recipe, replacements);
craftdef->registerCraft(def);
}
/*
CraftDefinitionToolRepair
*/
else if(type == "toolrepair"){
float additional_wear = getfloatfield_default(L, table,
"additional_wear", 0.0);
CraftDefinition *def = new CraftDefinitionToolRepair(
additional_wear);
craftdef->registerCraft(def);
}
/*
CraftDefinitionCooking
*/
else if(type == "cooking"){
std::string output = getstringfield_default(L, table, "output", "");
if(output == "")
throw LuaError(L, "Crafting definition (cooking)"
" is missing an output");
std::string recipe = getstringfield_default(L, table, "recipe", "");
if(recipe == "")
throw LuaError(L, "Crafting definition (cooking)"
" is missing a recipe"
" (output=\"" + output + "\")");
float cooktime = getfloatfield_default(L, table, "cooktime", 3.0);
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!read_craft_replacements(L, -1, replacements))
throw LuaError(L, "Invalid replacements"
" (cooking output=\"" + output + "\")");
}
CraftDefinition *def = new CraftDefinitionCooking(
output, recipe, cooktime, replacements);
craftdef->registerCraft(def);
}
/*
CraftDefinitionFuel
*/
else if(type == "fuel"){
std::string recipe = getstringfield_default(L, table, "recipe", "");
if(recipe == "")
throw LuaError(L, "Crafting definition (fuel)"
" is missing a recipe");
float burntime = getfloatfield_default(L, table, "burntime", 1.0);
CraftReplacements replacements;
lua_getfield(L, table, "replacements");
if(!lua_isnil(L, -1))
{
if(!read_craft_replacements(L, -1, replacements))
throw LuaError(L, "Invalid replacements"
" (fuel recipe=\"" + recipe + "\")");
}
CraftDefinition *def = new CraftDefinitionFuel(
recipe, burntime, replacements);
craftdef->registerCraft(def);
}
else
{
throw LuaError(L, "Unknown crafting definition type: \"" + type + "\"");
}
lua_pop(L, 1);
return 0; /* number of results */
}
// setting_set(name, value)
static int l_setting_set(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
const char *value = luaL_checkstring(L, 2);
g_settings->set(name, value);
return 0;
}
// setting_get(name)
static int l_setting_get(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
try{
std::string value = g_settings->get(name);
lua_pushstring(L, value.c_str());
} catch(SettingNotFoundException &e){
lua_pushnil(L);
}
return 1;
}
// setting_getbool(name)
static int l_setting_getbool(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
try{
bool value = g_settings->getBool(name);
lua_pushboolean(L, value);
} catch(SettingNotFoundException &e){
lua_pushnil(L);
}
return 1;
}
// setting_save()
static int l_setting_save(lua_State *L)
{
get_server(L)->saveConfig();
return 0;
}
// chat_send_all(text)
static int l_chat_send_all(lua_State *L)
{
const char *text = luaL_checkstring(L, 1);
// Get server from registry
Server *server = get_server(L);
// Send
server->notifyPlayers(narrow_to_wide(text));
return 0;
}
// chat_send_player(name, text)
static int l_chat_send_player(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
const char *text = luaL_checkstring(L, 2);
// Get server from registry
Server *server = get_server(L);
// Send
server->notifyPlayer(name, narrow_to_wide(text));
return 0;
}
// get_player_privs(name, text)
static int l_get_player_privs(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
// Get server from registry
Server *server = get_server(L);
// Do it
lua_newtable(L);
int table = lua_gettop(L);
std::set<std::string> privs_s = server->getPlayerEffectivePrivs(name);
for(std::set<std::string>::const_iterator
i = privs_s.begin(); i != privs_s.end(); i++){
lua_pushboolean(L, true);
lua_setfield(L, table, i->c_str());
}
lua_pushvalue(L, table);
return 1;
}
// get_ban_list()
static int l_get_ban_list(lua_State *L)
{
lua_pushstring(L, get_server(L)->getBanDescription("").c_str());
return 1;
}
// get_ban_description()
static int l_get_ban_description(lua_State *L)
{
const char * ip_or_name = luaL_checkstring(L, 1);
lua_pushstring(L, get_server(L)->getBanDescription(std::string(ip_or_name)).c_str());
return 1;
}
// ban_player()
static int l_ban_player(lua_State *L)
{
const char * name = luaL_checkstring(L, 1);
Player *player = get_env(L)->getPlayer(name);
if(player == NULL)
{
lua_pushboolean(L, false); // no such player
return 1;
}
try
{
Address addr = get_server(L)->getPeerAddress(get_env(L)->getPlayer(name)->peer_id);
std::string ip_str = addr.serializeString();
get_server(L)->setIpBanned(ip_str, name);
}
catch(con::PeerNotFoundException) // unlikely
{
dstream << __FUNCTION_NAME << ": peer was not found" << std::endl;
lua_pushboolean(L, false); // error
return 1;
}
lua_pushboolean(L, true);
return 1;
}
// unban_player_or_ip()
static int l_unban_player_of_ip(lua_State *L)
{
const char * ip_or_name = luaL_checkstring(L, 1);
get_server(L)->unsetIpBanned(ip_or_name);
lua_pushboolean(L, true);
return 1;
}
// get_inventory(location)
static int l_get_inventory(lua_State *L)
{
InventoryLocation loc;
std::string type = checkstringfield(L, 1, "type");
if(type == "player"){
std::string name = checkstringfield(L, 1, "name");
loc.setPlayer(name);
} else if(type == "node"){
lua_getfield(L, 1, "pos");
v3s16 pos = check_v3s16(L, -1);
loc.setNodeMeta(pos);
} else if(type == "detached"){
std::string name = checkstringfield(L, 1, "name");
loc.setDetached(name);
}
if(get_server(L)->getInventory(loc) != NULL)
InvRef::create(L, loc);
else
lua_pushnil(L);
return 1;
}
// create_detached_inventory_raw(name)
static int l_create_detached_inventory_raw(lua_State *L)
{
const char *name = luaL_checkstring(L, 1);
if(get_server(L)->createDetachedInventory(name) != NULL){
InventoryLocation loc;
loc.setDetached(name);
InvRef::create(L, loc);
}else{
lua_pushnil(L);
}
return 1;
}
// show_formspec(playername,formname,formspec)
static int l_show_formspec(lua_State *L)
{
const char *playername = luaL_checkstring(L, 1);
const char *formname = luaL_checkstring(L, 2);
const char *formspec = luaL_checkstring(L, 3);
if(get_server(L)->showFormspec(playername,formspec,formname))
{
lua_pushboolean(L, true);
}else{
lua_pushboolean(L, false);
}
return 1;
}
// get_dig_params(groups, tool_capabilities[, time_from_last_punch])
static int l_get_dig_params(lua_State *L)
{
std::map<std::string, int> groups;
read_groups(L, 1, groups);
ToolCapabilities tp = read_tool_capabilities(L, 2);
if(lua_isnoneornil(L, 3))
push_dig_params(L, getDigParams(groups, &tp));
else
push_dig_params(L, getDigParams(groups, &tp,
luaL_checknumber(L, 3)));
return 1;
}
// get_hit_params(groups, tool_capabilities[, time_from_last_punch])
static int l_get_hit_params(lua_State *L)
{
std::map<std::string, int> groups;
read_groups(L, 1, groups);
ToolCapabilities tp = read_tool_capabilities(L, 2);
if(lua_isnoneornil(L, 3))
push_hit_params(L, getHitParams(groups, &tp));
else
push_hit_params(L, getHitParams(groups, &tp,
luaL_checknumber(L, 3)));
return 1;
}
// get_current_modname()
static int l_get_current_modname(lua_State *L)
{
lua_getfield(L, LUA_REGISTRYINDEX, "minetest_current_modname");
return 1;
}
// get_modpath(modname)
static int l_get_modpath(lua_State *L)
{
std::string modname = luaL_checkstring(L, 1);
// Do it
if(modname == "__builtin"){
std::string path = get_server(L)->getBuiltinLuaPath();
lua_pushstring(L, path.c_str());
return 1;
}
const ModSpec *mod = get_server(L)->getModSpec(modname);
if(!mod){
lua_pushnil(L);
return 1;
}
lua_pushstring(L, mod->path.c_str());
return 1;
}
// get_modnames()
// the returned list is sorted alphabetically for you
static int l_get_modnames(lua_State *L)
{
// Get a list of mods
core::list<std::string> mods_unsorted, mods_sorted;
get_server(L)->getModNames(mods_unsorted);
// Take unsorted items from mods_unsorted and sort them into
// mods_sorted; not great performance but the number of mods on a
// server will likely be small.
for(core::list<std::string>::Iterator i = mods_unsorted.begin();
i != mods_unsorted.end(); i++)
{
bool added = false;
for(core::list<std::string>::Iterator x = mods_sorted.begin();
x != mods_unsorted.end(); x++)
{
// I doubt anybody using Minetest will be using
// anything not ASCII based :)
if((*i).compare(*x) <= 0)
{
mods_sorted.insert_before(x, *i);
added = true;
break;
}
}
if(!added)
mods_sorted.push_back(*i);
}
// Get the table insertion function from Lua.
lua_getglobal(L, "table");
lua_getfield(L, -1, "insert");
int insertion_func = lua_gettop(L);
// Package them up for Lua
lua_newtable(L);
int new_table = lua_gettop(L);
core::list<std::string>::Iterator i = mods_sorted.begin();
while(i != mods_sorted.end())
{
lua_pushvalue(L, insertion_func);
lua_pushvalue(L, new_table);
lua_pushstring(L, (*i).c_str());
if(lua_pcall(L, 2, 0, 0) != 0)
{
script_error(L, "error: %s", lua_tostring(L, -1));
}
i++;
}
return 1;
}
// get_worldpath()
static int l_get_worldpath(lua_State *L)
{
std::string worldpath = get_server(L)->getWorldPath();
lua_pushstring(L, worldpath.c_str());
return 1;
}
// sound_play(spec, parameters)
static int l_sound_play(lua_State *L)
{
SimpleSoundSpec spec;
read_soundspec(L, 1, spec);
ServerSoundParams params;
read_server_sound_params(L, 2, params);
s32 handle = get_server(L)->playSound(spec, params);
lua_pushinteger(L, handle);
return 1;
}
// sound_stop(handle)
static int l_sound_stop(lua_State *L)
{
int handle = luaL_checkinteger(L, 1);
get_server(L)->stopSound(handle);
return 0;
}
// is_singleplayer()
static int l_is_singleplayer(lua_State *L)
{
lua_pushboolean(L, get_server(L)->isSingleplayer());
return 1;
}
// get_password_hash(name, raw_password)
static int l_get_password_hash(lua_State *L)
{
std::string name = luaL_checkstring(L, 1);
std::string raw_password = luaL_checkstring(L, 2);
std::string hash = translatePassword(name,
narrow_to_wide(raw_password));
lua_pushstring(L, hash.c_str());
return 1;
}
// notify_authentication_modified(name)
static int l_notify_authentication_modified(lua_State *L)
{
std::string name = "";
if(lua_isstring(L, 1))
name = lua_tostring(L, 1);
get_server(L)->reportPrivsModified(name);
return 0;
}
// get_craft_result(input)
static int l_get_craft_result(lua_State *L)
{
int input_i = 1;
std::string method_s = getstringfield_default(L, input_i, "method", "normal");
enum CraftMethod method = (CraftMethod)getenumfield(L, input_i, "method",
es_CraftMethod, CRAFT_METHOD_NORMAL);
int width = 1;
lua_getfield(L, input_i, "width");
if(lua_isnumber(L, -1))
width = luaL_checkinteger(L, -1);
lua_pop(L, 1);
lua_getfield(L, input_i, "items");
std::vector<ItemStack> items = read_items(L, -1);
lua_pop(L, 1); // items
IGameDef *gdef = get_server(L);
ICraftDefManager *cdef = gdef->cdef();
CraftInput input(method, width, items);
CraftOutput output;
bool got = cdef->getCraftResult(input, output, true, gdef);
lua_newtable(L); // output table
if(got){
ItemStack item;
item.deSerialize(output.item, gdef->idef());
LuaItemStack::create(L, item);
lua_setfield(L, -2, "item");
setintfield(L, -1, "time", output.time);
} else {
LuaItemStack::create(L, ItemStack());
lua_setfield(L, -2, "item");
setintfield(L, -1, "time", 0);
}
lua_newtable(L); // decremented input table
lua_pushstring(L, method_s.c_str());
lua_setfield(L, -2, "method");
lua_pushinteger(L, width);
lua_setfield(L, -2, "width");
push_items(L, input.items);
lua_setfield(L, -2, "items");
return 2;
}
// get_craft_recipe(result item)
static int l_get_craft_recipe(lua_State *L)
{
int k = 0;
char tmp[20];
int input_i = 1;
std::string o_item = luaL_checkstring(L,input_i);
IGameDef *gdef = get_server(L);
ICraftDefManager *cdef = gdef->cdef();
CraftInput input;
CraftOutput output(o_item,0);
bool got = cdef->getCraftRecipe(input, output, gdef);
lua_newtable(L); // output table
if(got){
lua_newtable(L);
for(std::vector<ItemStack>::const_iterator
i = input.items.begin();
i != input.items.end(); i++, k++)
{
if (i->empty())
{
continue;
}
sprintf(tmp,"%d",k);
lua_pushstring(L,tmp);
lua_pushstring(L,i->name.c_str());
lua_settable(L, -3);
}
lua_setfield(L, -2, "items");
setintfield(L, -1, "width", input.width);
switch (input.method) {
case CRAFT_METHOD_NORMAL:
lua_pushstring(L,"normal");
break;
case CRAFT_METHOD_COOKING:
lua_pushstring(L,"cooking");
break;
case CRAFT_METHOD_FUEL:
lua_pushstring(L,"fuel");
break;
default:
lua_pushstring(L,"unknown");
}
lua_setfield(L, -2, "type");
} else {
lua_pushnil(L);
lua_setfield(L, -2, "items");
setintfield(L, -1, "width", 0);
}
return 1;
}
// rollback_get_last_node_actor(p, range, seconds) -> actor, p, seconds
static int l_rollback_get_last_node_actor(lua_State *L)
{
v3s16 p = read_v3s16(L, 1);
int range = luaL_checknumber(L, 2);
int seconds = luaL_checknumber(L, 3);
Server *server = get_server(L);
IRollbackManager *rollback = server->getRollbackManager();
v3s16 act_p;
int act_seconds = 0;
std::string actor = rollback->getLastNodeActor(p, range, seconds, &act_p, &act_seconds);
lua_pushstring(L, actor.c_str());
push_v3s16(L, act_p);
lua_pushnumber(L, act_seconds);
return 3;
}
// rollback_revert_actions_by(actor, seconds) -> bool, log messages
static int l_rollback_revert_actions_by(lua_State *L)
{
std::string actor = luaL_checkstring(L, 1);
int seconds = luaL_checknumber(L, 2);
Server *server = get_server(L);
IRollbackManager *rollback = server->getRollbackManager();
std::list<RollbackAction> actions = rollback->getRevertActions(actor, seconds);
std::list<std::string> log;
bool success = server->rollbackRevertActions(actions, &log);
// Push boolean result
lua_pushboolean(L, success);
// Get the table insert function and push the log table
lua_getglobal(L, "table");
lua_getfield(L, -1, "insert");
int table_insert = lua_gettop(L);
lua_newtable(L);
int table = lua_gettop(L);
for(std::list<std::string>::const_iterator i = log.begin();
i != log.end(); i++)
{
lua_pushvalue(L, table_insert);
lua_pushvalue(L, table);
lua_pushstring(L, i->c_str());
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
lua_remove(L, -2); // Remove table
lua_remove(L, -2); // Remove insert
return 2;
}
static const struct luaL_Reg minetest_f [] = {
{"debug", l_debug},
{"log", l_log},
{"request_shutdown", l_request_shutdown},
{"get_server_status", l_get_server_status},
{"register_item_raw", l_register_item_raw},
{"register_alias_raw", l_register_alias_raw},
{"register_craft", l_register_craft},
{"register_biome", l_register_biome},
{"register_biome_groups", l_register_biome_groups},
{"setting_set", l_setting_set},
{"setting_get", l_setting_get},
{"setting_getbool", l_setting_getbool},
{"setting_save",l_setting_save},
{"chat_send_all", l_chat_send_all},
{"chat_send_player", l_chat_send_player},
{"get_player_privs", l_get_player_privs},
{"get_ban_list", l_get_ban_list},
{"get_ban_description", l_get_ban_description},
{"ban_player", l_ban_player},
{"unban_player_or_ip", l_unban_player_of_ip},
{"get_inventory", l_get_inventory},
{"create_detached_inventory_raw", l_create_detached_inventory_raw},
{"show_formspec", l_show_formspec},
{"get_dig_params", l_get_dig_params},
{"get_hit_params", l_get_hit_params},
{"get_current_modname", l_get_current_modname},
{"get_modpath", l_get_modpath},
{"get_modnames", l_get_modnames},
{"get_worldpath", l_get_worldpath},
{"sound_play", l_sound_play},
{"sound_stop", l_sound_stop},
{"is_singleplayer", l_is_singleplayer},
{"get_password_hash", l_get_password_hash},
{"notify_authentication_modified", l_notify_authentication_modified},
{"get_craft_result", l_get_craft_result},
{"get_craft_recipe", l_get_craft_recipe},
{"rollback_get_last_node_actor", l_rollback_get_last_node_actor},
{"rollback_revert_actions_by", l_rollback_revert_actions_by},
{NULL, NULL}
};
/*
Main export function
*/
void scriptapi_export(lua_State *L, Server *server)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
verbosestream<<"scriptapi_export()"<<std::endl;
StackUnroller stack_unroller(L);
// Store server as light userdata in registry
lua_pushlightuserdata(L, server);
lua_setfield(L, LUA_REGISTRYINDEX, "minetest_server");
// Register global functions in table minetest
lua_newtable(L);
luaL_register(L, NULL, minetest_f);
lua_setglobal(L, "minetest");
// Get the main minetest table
lua_getglobal(L, "minetest");
// Add tables to minetest
lua_newtable(L);
lua_setfield(L, -2, "object_refs");
lua_newtable(L);
lua_setfield(L, -2, "luaentities");
// Register wrappers
LuaItemStack::Register(L);
InvRef::Register(L);
NodeMetaRef::Register(L);
NodeTimerRef::Register(L);
ObjectRef::Register(L);
EnvRef::Register(L);
LuaPseudoRandom::Register(L);
LuaPerlinNoise::Register(L);
}
bool scriptapi_loadmod(lua_State *L, const std::string &scriptpath,
const std::string &modname)
{
ModNameStorer modnamestorer(L, modname);
if(!string_allowed(modname, "abcdefghijklmnopqrstuvwxyz"
"0123456789_")){
errorstream<<"Error loading mod \""<<modname
<<"\": modname does not follow naming conventions: "
<<"Only chararacters [a-z0-9_] are allowed."<<std::endl;
return false;
}
bool success = false;
try{
success = script_load(L, scriptpath.c_str());
}
catch(LuaError &e){
errorstream<<"Error loading mod \""<<modname
<<"\": "<<e.what()<<std::endl;
}
return success;
}
void scriptapi_add_environment(lua_State *L, ServerEnvironment *env)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
verbosestream<<"scriptapi_add_environment"<<std::endl;
StackUnroller stack_unroller(L);
// Create EnvRef on stack
EnvRef::create(L, env);
int envref = lua_gettop(L);
// minetest.env = envref
lua_getglobal(L, "minetest");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushvalue(L, envref);
lua_setfield(L, -2, "env");
// Store environment as light userdata in registry
lua_pushlightuserdata(L, env);
lua_setfield(L, LUA_REGISTRYINDEX, "minetest_env");
/*
Add ActiveBlockModifiers to environment
*/
// Get minetest.registered_abms
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_abms");
luaL_checktype(L, -1, LUA_TTABLE);
int registered_abms = lua_gettop(L);
if(lua_istable(L, registered_abms)){
int table = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
int id = lua_tonumber(L, -2);
int current_abm = lua_gettop(L);
std::set<std::string> trigger_contents;
lua_getfield(L, current_abm, "nodenames");
if(lua_istable(L, -1)){
int table = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TSTRING);
trigger_contents.insert(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else if(lua_isstring(L, -1)){
trigger_contents.insert(lua_tostring(L, -1));
}
lua_pop(L, 1);
std::set<std::string> required_neighbors;
lua_getfield(L, current_abm, "neighbors");
if(lua_istable(L, -1)){
int table = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TSTRING);
required_neighbors.insert(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else if(lua_isstring(L, -1)){
required_neighbors.insert(lua_tostring(L, -1));
}
lua_pop(L, 1);
float trigger_interval = 10.0;
getfloatfield(L, current_abm, "interval", trigger_interval);
int trigger_chance = 50;
getintfield(L, current_abm, "chance", trigger_chance);
LuaABM *abm = new LuaABM(L, id, trigger_contents,
required_neighbors, trigger_interval, trigger_chance);
env->addActiveBlockModifier(abm);
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
lua_pop(L, 1);
}
#if 0
// Dump stack top with the dump2 function
static void dump2(lua_State *L, const char *name)
{
// Dump object (debug)
lua_getglobal(L, "dump2");
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushvalue(L, -2); // Get previous stack top as first parameter
lua_pushstring(L, name);
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
#endif
/*
object_reference
*/
void scriptapi_add_object_reference(lua_State *L, ServerActiveObject *cobj)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_add_object_reference: id="<<cobj->getId()<<std::endl;
StackUnroller stack_unroller(L);
// Create object on stack
ObjectRef::create(L, cobj); // Puts ObjectRef (as userdata) on stack
int object = lua_gettop(L);
// Get minetest.object_refs table
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "object_refs");
luaL_checktype(L, -1, LUA_TTABLE);
int objectstable = lua_gettop(L);
// object_refs[id] = object
lua_pushnumber(L, cobj->getId()); // Push id
lua_pushvalue(L, object); // Copy object to top of stack
lua_settable(L, objectstable);
}
void scriptapi_rm_object_reference(lua_State *L, ServerActiveObject *cobj)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_rm_object_reference: id="<<cobj->getId()<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.object_refs table
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "object_refs");
luaL_checktype(L, -1, LUA_TTABLE);
int objectstable = lua_gettop(L);
// Get object_refs[id]
lua_pushnumber(L, cobj->getId()); // Push id
lua_gettable(L, objectstable);
// Set object reference to NULL
ObjectRef::set_null(L);
lua_pop(L, 1); // pop object
// Set object_refs[id] = nil
lua_pushnumber(L, cobj->getId()); // Push id
lua_pushnil(L);
lua_settable(L, objectstable);
}
/*
misc
*/
// What scriptapi_run_callbacks does with the return values of callbacks.
// Regardless of the mode, if only one callback is defined,
// its return value is the total return value.
// Modes only affect the case where 0 or >= 2 callbacks are defined.
enum RunCallbacksMode
{
// Returns the return value of the first callback
// Returns nil if list of callbacks is empty
RUN_CALLBACKS_MODE_FIRST,
// Returns the return value of the last callback
// Returns nil if list of callbacks is empty
RUN_CALLBACKS_MODE_LAST,
// If any callback returns a false value, the first such is returned
// Otherwise, the first callback's return value (trueish) is returned
// Returns true if list of callbacks is empty
RUN_CALLBACKS_MODE_AND,
// Like above, but stops calling callbacks (short circuit)
// after seeing the first false value
RUN_CALLBACKS_MODE_AND_SC,
// If any callback returns a true value, the first such is returned
// Otherwise, the first callback's return value (falseish) is returned
// Returns false if list of callbacks is empty
RUN_CALLBACKS_MODE_OR,
// Like above, but stops calling callbacks (short circuit)
// after seeing the first true value
RUN_CALLBACKS_MODE_OR_SC,
// Note: "a true value" and "a false value" refer to values that
// are converted by lua_toboolean to true or false, respectively.
};
// Push the list of callbacks (a lua table).
// Then push nargs arguments.
// Then call this function, which
// - runs the callbacks
// - removes the table and arguments from the lua stack
// - pushes the return value, computed depending on mode
static void scriptapi_run_callbacks(lua_State *L, int nargs,
RunCallbacksMode mode)
{
// Insert the return value into the lua stack, below the table
assert(lua_gettop(L) >= nargs + 1);
lua_pushnil(L);
lua_insert(L, -(nargs + 1) - 1);
// Stack now looks like this:
// ... <return value = nil> <table> <arg#1> <arg#2> ... <arg#n>
int rv = lua_gettop(L) - nargs - 1;
int table = rv + 1;
int arg = table + 1;
luaL_checktype(L, table, LUA_TTABLE);
// Foreach
lua_pushnil(L);
bool first_loop = true;
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TFUNCTION);
// Call function
for(int i = 0; i < nargs; i++)
lua_pushvalue(L, arg+i);
if(lua_pcall(L, nargs, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
// Move return value to designated space in stack
// Or pop it
if(first_loop){
// Result of first callback is always moved
lua_replace(L, rv);
first_loop = false;
} else {
// Otherwise, what happens depends on the mode
if(mode == RUN_CALLBACKS_MODE_FIRST)
lua_pop(L, 1);
else if(mode == RUN_CALLBACKS_MODE_LAST)
lua_replace(L, rv);
else if(mode == RUN_CALLBACKS_MODE_AND ||
mode == RUN_CALLBACKS_MODE_AND_SC){
if((bool)lua_toboolean(L, rv) == true &&
(bool)lua_toboolean(L, -1) == false)
lua_replace(L, rv);
else
lua_pop(L, 1);
}
else if(mode == RUN_CALLBACKS_MODE_OR ||
mode == RUN_CALLBACKS_MODE_OR_SC){
if((bool)lua_toboolean(L, rv) == false &&
(bool)lua_toboolean(L, -1) == true)
lua_replace(L, rv);
else
lua_pop(L, 1);
}
else
assert(0);
}
// Handle short circuit modes
if(mode == RUN_CALLBACKS_MODE_AND_SC &&
(bool)lua_toboolean(L, rv) == false)
break;
else if(mode == RUN_CALLBACKS_MODE_OR_SC &&
(bool)lua_toboolean(L, rv) == true)
break;
// value removed, keep key for next iteration
}
// Remove stuff from stack, leaving only the return value
lua_settop(L, rv);
// Fix return value in case no callbacks were called
if(first_loop){
if(mode == RUN_CALLBACKS_MODE_AND ||
mode == RUN_CALLBACKS_MODE_AND_SC){
lua_pop(L, 1);
lua_pushboolean(L, true);
}
else if(mode == RUN_CALLBACKS_MODE_OR ||
mode == RUN_CALLBACKS_MODE_OR_SC){
lua_pop(L, 1);
lua_pushboolean(L, false);
}
}
}
bool scriptapi_on_chat_message(lua_State *L, const std::string &name,
const std::string &message)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_on_chat_messages
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_chat_messages");
// Call callbacks
lua_pushstring(L, name.c_str());
lua_pushstring(L, message.c_str());
scriptapi_run_callbacks(L, 2, RUN_CALLBACKS_MODE_OR_SC);
bool ate = lua_toboolean(L, -1);
return ate;
}
void scriptapi_on_shutdown(lua_State *L)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get registered shutdown hooks
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_shutdown");
// Call callbacks
scriptapi_run_callbacks(L, 0, RUN_CALLBACKS_MODE_FIRST);
}
void scriptapi_on_newplayer(lua_State *L, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_on_newplayers
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_newplayers");
// Call callbacks
objectref_get_or_create(L, player);
scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
}
void scriptapi_on_dieplayer(lua_State *L, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_on_dieplayers
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_dieplayers");
// Call callbacks
objectref_get_or_create(L, player);
scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
}
bool scriptapi_on_respawnplayer(lua_State *L, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_on_respawnplayers
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_respawnplayers");
// Call callbacks
objectref_get_or_create(L, player);
scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_OR);
bool positioning_handled_by_some = lua_toboolean(L, -1);
return positioning_handled_by_some;
}
void scriptapi_on_joinplayer(lua_State *L, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_on_joinplayers
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_joinplayers");
// Call callbacks
objectref_get_or_create(L, player);
scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
}
void scriptapi_on_leaveplayer(lua_State *L, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_on_leaveplayers
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_leaveplayers");
// Call callbacks
objectref_get_or_create(L, player);
scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
}
static void get_auth_handler(lua_State *L)
{
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_auth_handler");
if(lua_isnil(L, -1)){
lua_pop(L, 1);
lua_getfield(L, -1, "builtin_auth_handler");
}
if(lua_type(L, -1) != LUA_TTABLE)
throw LuaError(L, "Authentication handler table not valid");
}
bool scriptapi_get_auth(lua_State *L, const std::string &playername,
std::string *dst_password, std::set<std::string> *dst_privs)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
get_auth_handler(L);
lua_getfield(L, -1, "get_auth");
if(lua_type(L, -1) != LUA_TFUNCTION)
throw LuaError(L, "Authentication handler missing get_auth");
lua_pushstring(L, playername.c_str());
if(lua_pcall(L, 1, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
// nil = login not allowed
if(lua_isnil(L, -1))
return false;
luaL_checktype(L, -1, LUA_TTABLE);
std::string password;
bool found = getstringfield(L, -1, "password", password);
if(!found)
throw LuaError(L, "Authentication handler didn't return password");
if(dst_password)
*dst_password = password;
lua_getfield(L, -1, "privileges");
if(!lua_istable(L, -1))
throw LuaError(L,
"Authentication handler didn't return privilege table");
if(dst_privs)
read_privileges(L, -1, *dst_privs);
lua_pop(L, 1);
return true;
}
void scriptapi_create_auth(lua_State *L, const std::string &playername,
const std::string &password)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
get_auth_handler(L);
lua_getfield(L, -1, "create_auth");
if(lua_type(L, -1) != LUA_TFUNCTION)
throw LuaError(L, "Authentication handler missing create_auth");
lua_pushstring(L, playername.c_str());
lua_pushstring(L, password.c_str());
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
bool scriptapi_set_password(lua_State *L, const std::string &playername,
const std::string &password)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
get_auth_handler(L);
lua_getfield(L, -1, "set_password");
if(lua_type(L, -1) != LUA_TFUNCTION)
throw LuaError(L, "Authentication handler missing set_password");
lua_pushstring(L, playername.c_str());
lua_pushstring(L, password.c_str());
if(lua_pcall(L, 2, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
return lua_toboolean(L, -1);
}
/*
player
*/
void scriptapi_on_player_receive_fields(lua_State *L,
ServerActiveObject *player,
const std::string &formname,
const std::map<std::string, std::string> &fields)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Get minetest.registered_on_chat_messages
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_player_receive_fields");
// Call callbacks
// param 1
objectref_get_or_create(L, player);
// param 2
lua_pushstring(L, formname.c_str());
// param 3
lua_newtable(L);
for(std::map<std::string, std::string>::const_iterator
i = fields.begin(); i != fields.end(); i++){
const std::string &name = i->first;
const std::string &value = i->second;
lua_pushstring(L, name.c_str());
lua_pushlstring(L, value.c_str(), value.size());
lua_settable(L, -3);
}
scriptapi_run_callbacks(L, 3, RUN_CALLBACKS_MODE_OR_SC);
}
/*
item callbacks and node callbacks
*/
// Retrieves minetest.registered_items[name][callbackname]
// If that is nil or on error, return false and stack is unchanged
// If that is a function, returns true and pushes the
// function onto the stack
// If minetest.registered_items[name] doesn't exist, minetest.nodedef_default
// is tried instead so unknown items can still be manipulated to some degree
static bool get_item_callback(lua_State *L,
const char *name, const char *callbackname)
{
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_items");
lua_remove(L, -2);
luaL_checktype(L, -1, LUA_TTABLE);
lua_getfield(L, -1, name);
lua_remove(L, -2);
// Should be a table
if(lua_type(L, -1) != LUA_TTABLE)
{
// Report error and clean up
errorstream<<"Item \""<<name<<"\" not defined"<<std::endl;
lua_pop(L, 1);
// Try minetest.nodedef_default instead
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "nodedef_default");
lua_remove(L, -2);
luaL_checktype(L, -1, LUA_TTABLE);
}
lua_getfield(L, -1, callbackname);
lua_remove(L, -2);
// Should be a function or nil
if(lua_type(L, -1) == LUA_TFUNCTION)
{
return true;
}
else if(lua_isnil(L, -1))
{
lua_pop(L, 1);
return false;
}
else
{
errorstream<<"Item \""<<name<<"\" callback \""
<<callbackname<<" is not a function"<<std::endl;
lua_pop(L, 1);
return false;
}
}
bool scriptapi_item_on_drop(lua_State *L, ItemStack &item,
ServerActiveObject *dropper, v3f pos)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_item_callback(L, item.name.c_str(), "on_drop"))
return false;
// Call function
LuaItemStack::create(L, item);
objectref_get_or_create(L, dropper);
pushFloatPos(L, pos);
if(lua_pcall(L, 3, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnil(L, -1))
item = read_item(L, -1);
return true;
}
bool scriptapi_item_on_place(lua_State *L, ItemStack &item,
ServerActiveObject *placer, const PointedThing &pointed)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_item_callback(L, item.name.c_str(), "on_place"))
return false;
// Call function
LuaItemStack::create(L, item);
objectref_get_or_create(L, placer);
push_pointed_thing(L, pointed);
if(lua_pcall(L, 3, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnil(L, -1))
item = read_item(L, -1);
return true;
}
bool scriptapi_item_on_use(lua_State *L, ItemStack &item,
ServerActiveObject *user, const PointedThing &pointed)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_item_callback(L, item.name.c_str(), "on_use"))
return false;
// Call function
LuaItemStack::create(L, item);
objectref_get_or_create(L, user);
push_pointed_thing(L, pointed);
if(lua_pcall(L, 3, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnil(L, -1))
item = read_item(L, -1);
return true;
}
bool scriptapi_node_on_punch(lua_State *L, v3s16 p, MapNode node,
ServerActiveObject *puncher)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(), "on_punch"))
return false;
// Call function
push_v3s16(L, p);
pushnode(L, node, ndef);
objectref_get_or_create(L, puncher);
if(lua_pcall(L, 3, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
return true;
}
bool scriptapi_node_on_dig(lua_State *L, v3s16 p, MapNode node,
ServerActiveObject *digger)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(), "on_dig"))
return false;
// Call function
push_v3s16(L, p);
pushnode(L, node, ndef);
objectref_get_or_create(L, digger);
if(lua_pcall(L, 3, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
return true;
}
void scriptapi_node_on_construct(lua_State *L, v3s16 p, MapNode node)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(), "on_construct"))
return;
// Call function
push_v3s16(L, p);
if(lua_pcall(L, 1, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
void scriptapi_node_on_destruct(lua_State *L, v3s16 p, MapNode node)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(), "on_destruct"))
return;
// Call function
push_v3s16(L, p);
if(lua_pcall(L, 1, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
void scriptapi_node_after_destruct(lua_State *L, v3s16 p, MapNode node)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(), "after_destruct"))
return;
// Call function
push_v3s16(L, p);
pushnode(L, node, ndef);
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
bool scriptapi_node_on_timer(lua_State *L, v3s16 p, MapNode node, f32 dtime)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(), "on_timer"))
return false;
// Call function
push_v3s16(L, p);
lua_pushnumber(L,dtime);
if(lua_pcall(L, 2, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if((bool)lua_isboolean(L,-1) && (bool)lua_toboolean(L,-1) == true)
return true;
return false;
}
void scriptapi_node_on_receive_fields(lua_State *L, v3s16 p,
const std::string &formname,
const std::map<std::string, std::string> &fields,
ServerActiveObject *sender)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// If node doesn't exist, we don't know what callback to call
MapNode node = get_env(L)->getMap().getNodeNoEx(p);
if(node.getContent() == CONTENT_IGNORE)
return;
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(), "on_receive_fields"))
return;
// Call function
// param 1
push_v3s16(L, p);
// param 2
lua_pushstring(L, formname.c_str());
// param 3
lua_newtable(L);
for(std::map<std::string, std::string>::const_iterator
i = fields.begin(); i != fields.end(); i++){
const std::string &name = i->first;
const std::string &value = i->second;
lua_pushstring(L, name.c_str());
lua_pushlstring(L, value.c_str(), value.size());
lua_settable(L, -3);
}
// param 4
objectref_get_or_create(L, sender);
if(lua_pcall(L, 4, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
/*
Node metadata inventory callbacks
*/
// Return number of accepted items to be moved
int scriptapi_nodemeta_inventory_allow_move(lua_State *L, v3s16 p,
const std::string &from_list, int from_index,
const std::string &to_list, int to_index,
int count, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// If node doesn't exist, we don't know what callback to call
MapNode node = get_env(L)->getMap().getNodeNoEx(p);
if(node.getContent() == CONTENT_IGNORE)
return 0;
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(),
"allow_metadata_inventory_move"))
return count;
// function(pos, from_list, from_index, to_list, to_index, count, player)
// pos
push_v3s16(L, p);
// from_list
lua_pushstring(L, from_list.c_str());
// from_index
lua_pushinteger(L, from_index + 1);
// to_list
lua_pushstring(L, to_list.c_str());
// to_index
lua_pushinteger(L, to_index + 1);
// count
lua_pushinteger(L, count);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 7, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnumber(L, -1))
throw LuaError(L, "allow_metadata_inventory_move should return a number");
return luaL_checkinteger(L, -1);
}
// Return number of accepted items to be put
int scriptapi_nodemeta_inventory_allow_put(lua_State *L, v3s16 p,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// If node doesn't exist, we don't know what callback to call
MapNode node = get_env(L)->getMap().getNodeNoEx(p);
if(node.getContent() == CONTENT_IGNORE)
return 0;
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(),
"allow_metadata_inventory_put"))
return stack.count;
// Call function(pos, listname, index, stack, player)
// pos
push_v3s16(L, p);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnumber(L, -1))
throw LuaError(L, "allow_metadata_inventory_put should return a number");
return luaL_checkinteger(L, -1);
}
// Return number of accepted items to be taken
int scriptapi_nodemeta_inventory_allow_take(lua_State *L, v3s16 p,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// If node doesn't exist, we don't know what callback to call
MapNode node = get_env(L)->getMap().getNodeNoEx(p);
if(node.getContent() == CONTENT_IGNORE)
return 0;
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(),
"allow_metadata_inventory_take"))
return stack.count;
// Call function(pos, listname, index, count, player)
// pos
push_v3s16(L, p);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnumber(L, -1))
throw LuaError(L, "allow_metadata_inventory_take should return a number");
return luaL_checkinteger(L, -1);
}
// Report moved items
void scriptapi_nodemeta_inventory_on_move(lua_State *L, v3s16 p,
const std::string &from_list, int from_index,
const std::string &to_list, int to_index,
int count, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// If node doesn't exist, we don't know what callback to call
MapNode node = get_env(L)->getMap().getNodeNoEx(p);
if(node.getContent() == CONTENT_IGNORE)
return;
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(),
"on_metadata_inventory_move"))
return;
// function(pos, from_list, from_index, to_list, to_index, count, player)
// pos
push_v3s16(L, p);
// from_list
lua_pushstring(L, from_list.c_str());
// from_index
lua_pushinteger(L, from_index + 1);
// to_list
lua_pushstring(L, to_list.c_str());
// to_index
lua_pushinteger(L, to_index + 1);
// count
lua_pushinteger(L, count);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 7, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
// Report put items
void scriptapi_nodemeta_inventory_on_put(lua_State *L, v3s16 p,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// If node doesn't exist, we don't know what callback to call
MapNode node = get_env(L)->getMap().getNodeNoEx(p);
if(node.getContent() == CONTENT_IGNORE)
return;
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(),
"on_metadata_inventory_put"))
return;
// Call function(pos, listname, index, stack, player)
// pos
push_v3s16(L, p);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
// Report taken items
void scriptapi_nodemeta_inventory_on_take(lua_State *L, v3s16 p,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
INodeDefManager *ndef = get_server(L)->ndef();
// If node doesn't exist, we don't know what callback to call
MapNode node = get_env(L)->getMap().getNodeNoEx(p);
if(node.getContent() == CONTENT_IGNORE)
return;
// Push callback function on stack
if(!get_item_callback(L, ndef->get(node).name.c_str(),
"on_metadata_inventory_take"))
return;
// Call function(pos, listname, index, stack, player)
// pos
push_v3s16(L, p);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
/*
Detached inventory callbacks
*/
// Retrieves minetest.detached_inventories[name][callbackname]
// If that is nil or on error, return false and stack is unchanged
// If that is a function, returns true and pushes the
// function onto the stack
static bool get_detached_inventory_callback(lua_State *L,
const std::string &name, const char *callbackname)
{
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "detached_inventories");
lua_remove(L, -2);
luaL_checktype(L, -1, LUA_TTABLE);
lua_getfield(L, -1, name.c_str());
lua_remove(L, -2);
// Should be a table
if(lua_type(L, -1) != LUA_TTABLE)
{
errorstream<<"Item \""<<name<<"\" not defined"<<std::endl;
lua_pop(L, 1);
return false;
}
lua_getfield(L, -1, callbackname);
lua_remove(L, -2);
// Should be a function or nil
if(lua_type(L, -1) == LUA_TFUNCTION)
{
return true;
}
else if(lua_isnil(L, -1))
{
lua_pop(L, 1);
return false;
}
else
{
errorstream<<"Detached inventory \""<<name<<"\" callback \""
<<callbackname<<"\" is not a function"<<std::endl;
lua_pop(L, 1);
return false;
}
}
// Return number of accepted items to be moved
int scriptapi_detached_inventory_allow_move(lua_State *L,
const std::string &name,
const std::string &from_list, int from_index,
const std::string &to_list, int to_index,
int count, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_detached_inventory_callback(L, name, "allow_move"))
return count;
// function(inv, from_list, from_index, to_list, to_index, count, player)
// inv
InventoryLocation loc;
loc.setDetached(name);
InvRef::create(L, loc);
// from_list
lua_pushstring(L, from_list.c_str());
// from_index
lua_pushinteger(L, from_index + 1);
// to_list
lua_pushstring(L, to_list.c_str());
// to_index
lua_pushinteger(L, to_index + 1);
// count
lua_pushinteger(L, count);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 7, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnumber(L, -1))
throw LuaError(L, "allow_move should return a number");
return luaL_checkinteger(L, -1);
}
// Return number of accepted items to be put
int scriptapi_detached_inventory_allow_put(lua_State *L,
const std::string &name,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_detached_inventory_callback(L, name, "allow_put"))
return stack.count; // All will be accepted
// Call function(inv, listname, index, stack, player)
// inv
InventoryLocation loc;
loc.setDetached(name);
InvRef::create(L, loc);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnumber(L, -1))
throw LuaError(L, "allow_put should return a number");
return luaL_checkinteger(L, -1);
}
// Return number of accepted items to be taken
int scriptapi_detached_inventory_allow_take(lua_State *L,
const std::string &name,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_detached_inventory_callback(L, name, "allow_take"))
return stack.count; // All will be accepted
// Call function(inv, listname, index, stack, player)
// inv
InventoryLocation loc;
loc.setDetached(name);
InvRef::create(L, loc);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 1, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
if(!lua_isnumber(L, -1))
throw LuaError(L, "allow_take should return a number");
return luaL_checkinteger(L, -1);
}
// Report moved items
void scriptapi_detached_inventory_on_move(lua_State *L,
const std::string &name,
const std::string &from_list, int from_index,
const std::string &to_list, int to_index,
int count, ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_detached_inventory_callback(L, name, "on_move"))
return;
// function(inv, from_list, from_index, to_list, to_index, count, player)
// inv
InventoryLocation loc;
loc.setDetached(name);
InvRef::create(L, loc);
// from_list
lua_pushstring(L, from_list.c_str());
// from_index
lua_pushinteger(L, from_index + 1);
// to_list
lua_pushstring(L, to_list.c_str());
// to_index
lua_pushinteger(L, to_index + 1);
// count
lua_pushinteger(L, count);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 7, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
// Report put items
void scriptapi_detached_inventory_on_put(lua_State *L,
const std::string &name,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_detached_inventory_callback(L, name, "on_put"))
return;
// Call function(inv, listname, index, stack, player)
// inv
InventoryLocation loc;
loc.setDetached(name);
InvRef::create(L, loc);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
// Report taken items
void scriptapi_detached_inventory_on_take(lua_State *L,
const std::string &name,
const std::string &listname, int index, ItemStack &stack,
ServerActiveObject *player)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
StackUnroller stack_unroller(L);
// Push callback function on stack
if(!get_detached_inventory_callback(L, name, "on_take"))
return;
// Call function(inv, listname, index, stack, player)
// inv
InventoryLocation loc;
loc.setDetached(name);
InvRef::create(L, loc);
// listname
lua_pushstring(L, listname.c_str());
// index
lua_pushinteger(L, index + 1);
// stack
LuaItemStack::create(L, stack);
// player
objectref_get_or_create(L, player);
if(lua_pcall(L, 5, 0, 0))
script_error(L, "error: %s", lua_tostring(L, -1));
}
/*
environment
*/
void scriptapi_environment_step(lua_State *L, float dtime)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_environment_step"<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.registered_globalsteps
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_globalsteps");
// Call callbacks
lua_pushnumber(L, dtime);
scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
}
void scriptapi_environment_on_generated(lua_State *L, v3s16 minp, v3s16 maxp,
u32 blockseed)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_environment_on_generated"<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.registered_on_generateds
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_generateds");
// Call callbacks
push_v3s16(L, minp);
push_v3s16(L, maxp);
lua_pushnumber(L, blockseed);
scriptapi_run_callbacks(L, 3, RUN_CALLBACKS_MODE_FIRST);
}
/*
luaentity
*/
bool scriptapi_luaentity_add(lua_State *L, u16 id, const char *name)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
verbosestream<<"scriptapi_luaentity_add: id="<<id<<" name=\""
<<name<<"\""<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.registered_entities[name]
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_entities");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushstring(L, name);
lua_gettable(L, -2);
// Should be a table, which we will use as a prototype
//luaL_checktype(L, -1, LUA_TTABLE);
if(lua_type(L, -1) != LUA_TTABLE){
errorstream<<"LuaEntity name \""<<name<<"\" not defined"<<std::endl;
return false;
}
int prototype_table = lua_gettop(L);
//dump2(L, "prototype_table");
// Create entity object
lua_newtable(L);
int object = lua_gettop(L);
// Set object metatable
lua_pushvalue(L, prototype_table);
lua_setmetatable(L, -2);
// Add object reference
// This should be userdata with metatable ObjectRef
objectref_get(L, id);
luaL_checktype(L, -1, LUA_TUSERDATA);
if(!luaL_checkudata(L, -1, "ObjectRef"))
luaL_typerror(L, -1, "ObjectRef");
lua_setfield(L, -2, "object");
// minetest.luaentities[id] = object
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "luaentities");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushnumber(L, id); // Push id
lua_pushvalue(L, object); // Copy object to top of stack
lua_settable(L, -3);
return true;
}
void scriptapi_luaentity_activate(lua_State *L, u16 id,
const std::string &staticdata, u32 dtime_s)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
verbosestream<<"scriptapi_luaentity_activate: id="<<id<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.luaentities[id]
luaentity_get(L, id);
int object = lua_gettop(L);
// Get on_activate function
lua_pushvalue(L, object);
lua_getfield(L, -1, "on_activate");
if(!lua_isnil(L, -1)){
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushvalue(L, object); // self
lua_pushlstring(L, staticdata.c_str(), staticdata.size());
lua_pushinteger(L, dtime_s);
// Call with 3 arguments, 0 results
if(lua_pcall(L, 3, 0, 0))
script_error(L, "error running function on_activate: %s\n",
lua_tostring(L, -1));
}
}
void scriptapi_luaentity_rm(lua_State *L, u16 id)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
verbosestream<<"scriptapi_luaentity_rm: id="<<id<<std::endl;
// Get minetest.luaentities table
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "luaentities");
luaL_checktype(L, -1, LUA_TTABLE);
int objectstable = lua_gettop(L);
// Set luaentities[id] = nil
lua_pushnumber(L, id); // Push id
lua_pushnil(L);
lua_settable(L, objectstable);
lua_pop(L, 2); // pop luaentities, minetest
}
std::string scriptapi_luaentity_get_staticdata(lua_State *L, u16 id)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_luaentity_get_staticdata: id="<<id<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.luaentities[id]
luaentity_get(L, id);
int object = lua_gettop(L);
// Get get_staticdata function
lua_pushvalue(L, object);
lua_getfield(L, -1, "get_staticdata");
if(lua_isnil(L, -1))
return "";
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushvalue(L, object); // self
// Call with 1 arguments, 1 results
if(lua_pcall(L, 1, 1, 0))
script_error(L, "error running function get_staticdata: %s\n",
lua_tostring(L, -1));
size_t len=0;
const char *s = lua_tolstring(L, -1, &len);
return std::string(s, len);
}
void scriptapi_luaentity_get_properties(lua_State *L, u16 id,
ObjectProperties *prop)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_luaentity_get_properties: id="<<id<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.luaentities[id]
luaentity_get(L, id);
//int object = lua_gettop(L);
// Set default values that differ from ObjectProperties defaults
prop->hp_max = 10;
/* Read stuff */
prop->hp_max = getintfield_default(L, -1, "hp_max", 10);
getboolfield(L, -1, "physical", prop->physical);
getfloatfield(L, -1, "weight", prop->weight);
lua_getfield(L, -1, "collisionbox");
if(lua_istable(L, -1))
prop->collisionbox = read_aabb3f(L, -1, 1.0);
lua_pop(L, 1);
getstringfield(L, -1, "visual", prop->visual);
getstringfield(L, -1, "mesh", prop->mesh);
// Deprecated: read object properties directly
read_object_properties(L, -1, prop);
// Read initial_properties
lua_getfield(L, -1, "initial_properties");
read_object_properties(L, -1, prop);
lua_pop(L, 1);
}
void scriptapi_luaentity_step(lua_State *L, u16 id, float dtime)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.luaentities[id]
luaentity_get(L, id);
int object = lua_gettop(L);
// State: object is at top of stack
// Get step function
lua_getfield(L, -1, "on_step");
if(lua_isnil(L, -1))
return;
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushvalue(L, object); // self
lua_pushnumber(L, dtime); // dtime
// Call with 2 arguments, 0 results
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error running function 'on_step': %s\n", lua_tostring(L, -1));
}
// Calls entity:on_punch(ObjectRef puncher, time_from_last_punch,
// tool_capabilities, direction)
void scriptapi_luaentity_punch(lua_State *L, u16 id,
ServerActiveObject *puncher, float time_from_last_punch,
const ToolCapabilities *toolcap, v3f dir)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.luaentities[id]
luaentity_get(L, id);
int object = lua_gettop(L);
// State: object is at top of stack
// Get function
lua_getfield(L, -1, "on_punch");
if(lua_isnil(L, -1))
return;
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushvalue(L, object); // self
objectref_get_or_create(L, puncher); // Clicker reference
lua_pushnumber(L, time_from_last_punch);
push_tool_capabilities(L, *toolcap);
push_v3f(L, dir);
// Call with 5 arguments, 0 results
if(lua_pcall(L, 5, 0, 0))
script_error(L, "error running function 'on_punch': %s\n", lua_tostring(L, -1));
}
// Calls entity:on_rightclick(ObjectRef clicker)
void scriptapi_luaentity_rightclick(lua_State *L, u16 id,
ServerActiveObject *clicker)
{
realitycheck(L);
assert(lua_checkstack(L, 20));
//infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
StackUnroller stack_unroller(L);
// Get minetest.luaentities[id]
luaentity_get(L, id);
int object = lua_gettop(L);
// State: object is at top of stack
// Get function
lua_getfield(L, -1, "on_rightclick");
if(lua_isnil(L, -1))
return;
luaL_checktype(L, -1, LUA_TFUNCTION);
lua_pushvalue(L, object); // self
objectref_get_or_create(L, clicker); // Clicker reference
// Call with 2 arguments, 0 results
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error running function 'on_rightclick': %s\n", lua_tostring(L, -1));
}
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