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minetest/src/script/common/c_content.cpp

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/*
Minetest
Copyright (C) 2013 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 "common/c_content.h"
#include "common/c_converter.h"
#include "common/c_types.h"
#include "nodedef.h"
#include "itemdef.h"
#include "object_properties.h"
#include "cpp_api/s_node.h"
#include "lua_api/l_object.h"
#include "lua_api/l_item.h"
#include "common/c_internal.h"
#include "server.h"
#include "log.h"
#include "tool.h"
#include "serverobject.h"
#include "porting.h"
#include "mapgen.h"
#include "json/json.h"
struct EnumString es_TileAnimationType[] =
{
{TAT_NONE, "none"},
{TAT_VERTICAL_FRAMES, "vertical_frames"},
{0, NULL},
};
/******************************************************************************/
ItemDefinition read_item_definition(lua_State* L,int index,
ItemDefinition default_def)
{
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);
lua_getfield(L, index, "sounds");
if(lua_istable(L, -1)){
lua_getfield(L, -1, "place");
read_soundspec(L, -1, def.sound_place);
lua_pop(L, 1);
}
lua_pop(L, 1);
def.range = getfloatfield_default(L, index, "range", def.range);
// 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;
}
/******************************************************************************/
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);
getboolfield(L, -1, "collide_with_objects", prop->collideWithObjects);
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);
getfloatfield(L, -1, "stepheight", prop->stepheight);
prop->stepheight*=BS;
lua_getfield(L, -1, "automatic_face_movement_dir");
if (lua_isnumber(L, -1)) {
prop->automatic_face_movement_dir = true;
prop->automatic_face_movement_dir_offset = luaL_checknumber(L, -1);
} else if (lua_isboolean(L, -1)) {
prop->automatic_face_movement_dir = lua_toboolean(L, -1);
prop->automatic_face_movement_dir_offset = 0.0;
}
lua_pop(L, 1);
}
/******************************************************************************/
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 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);
lua_getfield(L, index, "on_rightclick");
f.rightclickable = lua_isfunction(L, -1);
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",
ScriptApiNode::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==CF_SPECIAL_COUNT){
lua_pop(L, 1);
break;
}
}
}
lua_pop(L, 1);
f.alpha = getintfield_default(L, index, "alpha", 255);
bool usealpha = getboolfield_default(L, index,
"use_texture_alpha", false);
if (usealpha)
f.alpha = 0;
/* 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",
ScriptApiNode::es_ContentParamType, CPT_NONE);
f.param_type_2 = (ContentParamType2)getenumfield(L, index, "paramtype2",
ScriptApiNode::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",
ScriptApiNode::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);
f.liquid_range = getintfield_default(L, index,
"liquid_range", f.liquid_range);
f.leveled = getintfield_default(L, index, "leveled", f.leveled);
getboolfield(L, index, "liquid_renewable", f.liquid_renewable);
getstringfield(L, index, "freezemelt", f.freezemelt);
f.drowning = getintfield_default(L, index,
"drowning", f.drowning);
// 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);
f.waving = getintfield_default(L, index,
"waving", f.waving);
// 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;
}
/******************************************************************************/
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);
}
}
/******************************************************************************/
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);
}
}
/******************************************************************************/
NodeBox read_nodebox(lua_State *L, int index)
{
NodeBox nodebox;
if(lua_istable(L, -1)){
nodebox.type = (NodeBoxType)getenumfield(L, index, "type",
ScriptApiNode::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;
}
/******************************************************************************/
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);
}
/******************************************************************************/
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");
}
/******************************************************************************/
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)){
//TODO find way to access backtrace fct from here
// infostream<<script_get_backtrace(L)<<std::endl;
infostream<<"WARNING: field \""<<fieldname<<"\": "
<<message<<std::endl;
}
lua_pop(L, 1);
}
/******************************************************************************/
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;
}
/******************************************************************************/
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;
}
/******************************************************************************/
ItemStack read_item(lua_State* L, int index,Server* srv)
{
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 = srv->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 = srv->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("Expecting itemstack, itemstring, table or nil");
}
}
/******************************************************************************/
void push_tool_capabilities(lua_State *L,
const ToolCapabilities &toolcap)
{
lua_newtable(L);
setfloatfield(L, -1, "full_punch_interval", toolcap.full_punch_interval);
setintfield(L, -1, "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");
//Create damage_groups table
lua_newtable(L);
// For each damage group
for(std::map<std::string, s16>::const_iterator
i = toolcap.damageGroups.begin(); i != toolcap.damageGroups.end(); i++){
// Create damage group table
lua_pushinteger(L, i->second);
lua_setfield(L, -2, i->first.c_str());
}
lua_setfield(L, -2, "damage_groups");
}
/******************************************************************************/
void push_inventory_list(lua_State *L, Inventory *inv, const char *name)
{
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);
}
/******************************************************************************/
void read_inventory_list(lua_State *L, int tableindex,
Inventory *inv, const char *name, Server* srv, int forcesize)
{
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,srv);
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++;
}
}
/******************************************************************************/
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);
lua_getfield(L, table, "damage_groups");
if(lua_istable(L, -1)){
int table_damage_groups = lua_gettop(L);
lua_pushnil(L);
while(lua_next(L, table_damage_groups) != 0){
// key at index -2 and value at index -1
std::string groupname = luaL_checkstring(L, -2);
u16 value = luaL_checkinteger(L, -1);
toolcap.damageGroups[groupname] = value;
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
lua_pop(L, 1);
return toolcap;
}
/******************************************************************************/
void push_dig_params(lua_State *L,const DigParams &params)
{
lua_newtable(L);
setboolfield(L, -1, "diggable", params.diggable);
setfloatfield(L, -1, "time", params.time);
setintfield(L, -1, "wear", params.wear);
}
/******************************************************************************/
void push_hit_params(lua_State *L,const HitParams &params)
{
lua_newtable(L);
setintfield(L, -1, "hp", params.hp);
setintfield(L, -1, "wear", params.wear);
}
/******************************************************************************/
bool getflagsfield(lua_State *L, int table, const char *fieldname,
FlagDesc *flagdesc, u32 *flags, u32 *flagmask)
{
lua_getfield(L, table, fieldname);
bool success = read_flags(L, -1, flagdesc, flags, flagmask);
lua_pop(L, 1);
return success;
}
bool read_flags(lua_State *L, int index, FlagDesc *flagdesc,
u32 *flags, u32 *flagmask)
{
if (lua_isstring(L, index)) {
std::string flagstr = lua_tostring(L, index);
*flags = readFlagString(flagstr, flagdesc, flagmask);
} else if (lua_istable(L, index)) {
*flags = read_flags_table(L, index, flagdesc, flagmask);
} else {
return false;
}
return true;
}
u32 read_flags_table(lua_State *L, int table, FlagDesc *flagdesc, u32 *flagmask)
{
u32 flags = 0, mask = 0;
char fnamebuf[64] = "no";
for (int i = 0; flagdesc[i].name; i++) {
bool result;
if (getboolfield(L, table, flagdesc[i].name, result)) {
mask |= flagdesc[i].flag;
if (result)
flags |= flagdesc[i].flag;
}
strlcpy(fnamebuf + 2, flagdesc[i].name, sizeof(fnamebuf) - 2);
if (getboolfield(L, table, fnamebuf, result))
mask |= flagdesc[i].flag;
}
if (flagmask)
*flagmask = mask;
return flags;
}
/******************************************************************************/
/* Lua Stored data! */
/******************************************************************************/
/******************************************************************************/
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);
}
}
/******************************************************************************/
void push_items(lua_State *L, const std::vector<ItemStack> &items)
{
// Create and fill table
lua_createtable(L, items.size(), 0);
std::vector<ItemStack>::const_iterator iter = items.begin();
for (u32 i = 0; iter != items.end(); iter++) {
LuaItemStack::create(L, *iter);
lua_rawseti(L, -2, ++i);
}
}
/******************************************************************************/
std::vector<ItemStack> read_items(lua_State *L, int index, Server *srv)
{
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)) {
s32 key = luaL_checkinteger(L, -2);
if (key < 1) {
throw LuaError("Invalid inventory list index");
}
if (items.size() < (u32) key) {
items.resize(key);
}
items[key - 1] = read_item(L, -1, srv);
lua_pop(L, 1);
}
return items;
}
/******************************************************************************/
void luaentity_get(lua_State *L, u16 id)
{
// Get luaentities[i]
lua_getglobal(L, "core");
lua_getfield(L, -1, "luaentities");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushnumber(L, id);
lua_gettable(L, -2);
lua_remove(L, -2); // Remove luaentities
lua_remove(L, -2); // Remove core
}
/******************************************************************************/
NoiseParams *read_noiseparams(lua_State *L, int index)
{
NoiseParams *np = new NoiseParams;
if (!read_noiseparams_nc(L, index, np)) {
delete np;
np = NULL;
}
return np;
}
bool read_noiseparams_nc(lua_State *L, int index, NoiseParams *np)
{
if (index < 0)
index = lua_gettop(L) + 1 + index;
if (!lua_istable(L, index))
return false;
np->offset = getfloatfield_default(L, index, "offset", 0.0);
np->scale = getfloatfield_default(L, index, "scale", 0.0);
np->persist = getfloatfield_default(L, index, "persist", 0.0);
np->seed = getintfield_default(L, index, "seed", 0);
np->octaves = getintfield_default(L, index, "octaves", 0);
lua_getfield(L, index, "spread");
np->spread = read_v3f(L, -1);
lua_pop(L, 1);
return true;
}
/******************************************************************************/
bool read_schematic(lua_State *L, int index, DecoSchematic *dschem, Server *server) {
if (index < 0)
index = lua_gettop(L) + 1 + index;
INodeDefManager *ndef = server->getNodeDefManager();
if (lua_istable(L, index)) {
lua_getfield(L, index, "size");
v3s16 size = read_v3s16(L, -1);
lua_pop(L, 1);
int numnodes = size.X * size.Y * size.Z;
MapNode *schemdata = new MapNode[numnodes];
int i = 0;
// Get schematic data
lua_getfield(L, index, "data");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushnil(L);
while (lua_next(L, -2)) {
if (i < numnodes) {
// same as readnode, except param1 default is MTSCHEM_PROB_CONST
lua_getfield(L, -1, "name");
const char *name = luaL_checkstring(L, -1);
lua_pop(L, 1);
u8 param1;
lua_getfield(L, -1, "param1");
param1 = !lua_isnil(L, -1) ? lua_tonumber(L, -1) : MTSCHEM_PROB_ALWAYS;
lua_pop(L, 1);
u8 param2;
lua_getfield(L, -1, "param2");
param2 = !lua_isnil(L, -1) ? lua_tonumber(L, -1) : 0;
lua_pop(L, 1);
schemdata[i] = MapNode(ndef, name, param1, param2);
}
i++;
lua_pop(L, 1);
}
if (i != numnodes) {
errorstream << "read_schematic: incorrect number of "
"nodes provided in raw schematic data (got " << i <<
", expected " << numnodes << ")." << std::endl;
return false;
}
u8 *sliceprobs = new u8[size.Y];
for (i = 0; i != size.Y; i++)
sliceprobs[i] = MTSCHEM_PROB_ALWAYS;
// Get Y-slice probability values (if present)
lua_getfield(L, index, "yslice_prob");
if (lua_istable(L, -1)) {
lua_pushnil(L);
while (lua_next(L, -2)) {
if (getintfield(L, -1, "ypos", i) && i >= 0 && i < size.Y) {
sliceprobs[i] = getintfield_default(L, -1,
"prob", MTSCHEM_PROB_ALWAYS);
}
lua_pop(L, 1);
}
}
dschem->size = size;
dschem->schematic = schemdata;
dschem->slice_probs = sliceprobs;
} else if (lua_isstring(L, index)) {
dschem->filename = std::string(lua_tostring(L, index));
} else {
errorstream << "read_schematic: missing schematic "
"filename or raw schematic data" << std::endl;
return false;
}
return true;
}
/******************************************************************************/
// Returns depth of json value tree
static int push_json_value_getdepth(const Json::Value &value)
{
if (!value.isArray() && !value.isObject())
return 1;
int maxdepth = 0;
for (Json::Value::const_iterator it = value.begin();
it != value.end(); ++it) {
int elemdepth = push_json_value_getdepth(*it);
if (elemdepth > maxdepth)
maxdepth = elemdepth;
}
return maxdepth + 1;
}
// Recursive function to convert JSON --> Lua table
static bool push_json_value_helper(lua_State *L, const Json::Value &value,
int nullindex)
{
switch(value.type()) {
case Json::nullValue:
default:
lua_pushvalue(L, nullindex);
break;
case Json::intValue:
lua_pushinteger(L, value.asInt());
break;
case Json::uintValue:
lua_pushinteger(L, value.asUInt());
break;
case Json::realValue:
lua_pushnumber(L, value.asDouble());
break;
case Json::stringValue:
{
const char *str = value.asCString();
lua_pushstring(L, str ? str : "");
}
break;
case Json::booleanValue:
lua_pushboolean(L, value.asInt());
break;
case Json::arrayValue:
lua_newtable(L);
for (Json::Value::const_iterator it = value.begin();
it != value.end(); ++it) {
push_json_value_helper(L, *it, nullindex);
lua_rawseti(L, -2, it.index() + 1);
}
break;
case Json::objectValue:
lua_newtable(L);
for (Json::Value::const_iterator it = value.begin();
it != value.end(); ++it) {
const char *str = it.memberName();
lua_pushstring(L, str ? str : "");
push_json_value_helper(L, *it, nullindex);
lua_rawset(L, -3);
}
break;
}
return true;
}
// converts JSON --> Lua table; returns false if lua stack limit exceeded
// nullindex: Lua stack index of value to use in place of JSON null
bool push_json_value(lua_State *L, const Json::Value &value, int nullindex)
{
if(nullindex < 0)
nullindex = lua_gettop(L) + 1 + nullindex;
int depth = push_json_value_getdepth(value);
// The maximum number of Lua stack slots used at each recursion level
// of push_json_value_helper is 2, so make sure there a depth * 2 slots
if (lua_checkstack(L, depth * 2))
return push_json_value_helper(L, value, nullindex);
else
return false;
}
// Converts Lua table --> JSON
void read_json_value(lua_State *L, Json::Value &root, int index, u8 recursion)
{
if (recursion > 16) {
throw SerializationError("Maximum recursion depth exceeded");
}
int type = lua_type(L, index);
if (type == LUA_TBOOLEAN) {
root = (bool) lua_toboolean(L, index);
} else if (type == LUA_TNUMBER) {
root = lua_tonumber(L, index);
} else if (type == LUA_TSTRING) {
size_t len;
const char *str = lua_tolstring(L, index, &len);
root = std::string(str, len);
} else if (type == LUA_TTABLE) {
lua_pushnil(L);
while (lua_next(L, index)) {
// Key is at -2 and value is at -1
Json::Value value;
read_json_value(L, value, lua_gettop(L), recursion + 1);
Json::ValueType roottype = root.type();
int keytype = lua_type(L, -1);
if (keytype == LUA_TNUMBER) {
lua_Number key = lua_tonumber(L, -1);
if (roottype != Json::nullValue && roottype != Json::arrayValue) {
throw SerializationError("Can't mix array and object values in JSON");
} else if (key < 1) {
throw SerializationError("Can't use zero-based or negative indexes in JSON");
} else if (floor(key) != key) {
throw SerializationError("Can't use indexes with a fractional part in JSON");
}
root[(Json::ArrayIndex) key - 1] = value;
} else if (keytype == LUA_TSTRING) {
if (roottype != Json::nullValue && roottype != Json::objectValue) {
throw SerializationError("Can't mix array and object values in JSON");
}
root[lua_tostring(L, -1)] = value;
} else {
throw SerializationError("Lua key to convert to JSON is not a string or number");
}
}
} else if (type == LUA_TNIL) {
root = Json::nullValue;
} else {
throw SerializationError("Can only store booleans, numbers, strings, objects, arrays, and null in JSON");
}
lua_pop(L, 1); // Pop value
}
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