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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 "object_properties.h"
#include "collision.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 "porting.h"
#include "mapgen/mg_schematic.h"
#include "noise.h"
#include "server/player_sao.h"
#include "util/pointedthing.h"
#include "debug.h" // For FATAL_ERROR
#include <json/json.h>
struct EnumString es_TileAnimationType[] =
{
{TAT_NONE, "none"},
{TAT_VERTICAL_FRAMES, "vertical_frames"},
{TAT_SHEET_2D, "sheet_2d"},
{0, NULL},
};
/******************************************************************************/
void read_item_definition(lua_State* L, int index,
const ItemDefinition &default_def, ItemDefinition &def)
{
if (index < 0)
index = lua_gettop(L) + 1 + index;
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, "inventory_overlay", def.inventory_overlay);
getstringfield(L, index, "wield_image", def.wield_image);
getstringfield(L, index, "wield_overlay", def.wield_overlay);
getstringfield(L, index, "palette", def.palette_image);
// Read item color.
lua_getfield(L, index, "color");
read_color(L, -1, &def.color);
lua_pop(L, 1);
lua_getfield(L, index, "wield_scale");
if(lua_istable(L, -1)){
def.wield_scale = check_v3f(L, -1);
}
lua_pop(L, 1);
int stack_max = getintfield_default(L, index, "stack_max", def.stack_max);
def.stack_max = rangelim(stack_max, 1, U16_MAX);
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",
"Obsolete; 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.empty() && 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_isnil(L, -1)) {
luaL_checktype(L, -1, LUA_TTABLE);
lua_getfield(L, -1, "place");
read_soundspec(L, -1, def.sound_place);
lua_pop(L, 1);
lua_getfield(L, -1, "place_failed");
read_soundspec(L, -1, def.sound_place_failed);
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);
}
/******************************************************************************/
void push_item_definition(lua_State *L, const ItemDefinition &i)
{
lua_newtable(L);
lua_pushstring(L, i.name.c_str());
lua_setfield(L, -2, "name");
lua_pushstring(L, i.description.c_str());
lua_setfield(L, -2, "description");
}
void push_item_definition_full(lua_State *L, const ItemDefinition &i)
{
std::string type(es_ItemType[(int)i.type].str);
lua_newtable(L);
lua_pushstring(L, i.name.c_str());
lua_setfield(L, -2, "name");
lua_pushstring(L, i.description.c_str());
lua_setfield(L, -2, "description");
lua_pushstring(L, type.c_str());
lua_setfield(L, -2, "type");
lua_pushstring(L, i.inventory_image.c_str());
lua_setfield(L, -2, "inventory_image");
lua_pushstring(L, i.inventory_overlay.c_str());
lua_setfield(L, -2, "inventory_overlay");
lua_pushstring(L, i.wield_image.c_str());
lua_setfield(L, -2, "wield_image");
lua_pushstring(L, i.wield_overlay.c_str());
lua_setfield(L, -2, "wield_overlay");
lua_pushstring(L, i.palette_image.c_str());
lua_setfield(L, -2, "palette_image");
push_ARGB8(L, i.color);
lua_setfield(L, -2, "color");
push_v3f(L, i.wield_scale);
lua_setfield(L, -2, "wield_scale");
lua_pushinteger(L, i.stack_max);
lua_setfield(L, -2, "stack_max");
lua_pushboolean(L, i.usable);
lua_setfield(L, -2, "usable");
lua_pushboolean(L, i.liquids_pointable);
lua_setfield(L, -2, "liquids_pointable");
if (i.tool_capabilities) {
push_tool_capabilities(L, *i.tool_capabilities);
lua_setfield(L, -2, "tool_capabilities");
}
push_groups(L, i.groups);
lua_setfield(L, -2, "groups");
push_soundspec(L, i.sound_place);
lua_setfield(L, -2, "sound_place");
push_soundspec(L, i.sound_place_failed);
lua_setfield(L, -2, "sound_place_failed");
lua_pushstring(L, i.node_placement_prediction.c_str());
lua_setfield(L, -2, "node_placement_prediction");
}
/******************************************************************************/
void read_object_properties(lua_State *L, int index,
ServerActiveObject *sao, ObjectProperties *prop, IItemDefManager *idef)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if (lua_isnil(L, index))
return;
luaL_checktype(L, -1, LUA_TTABLE);
int hp_max = 0;
if (getintfield(L, -1, "hp_max", hp_max)) {
prop->hp_max = (u16)rangelim(hp_max, 0, U16_MAX);
if (prop->hp_max < sao->getHP()) {
PlayerHPChangeReason reason(PlayerHPChangeReason::SET_HP);
sao->setHP(prop->hp_max, reason);
if (sao->getType() == ACTIVEOBJECT_TYPE_PLAYER)
sao->getEnv()->getGameDef()->SendPlayerHPOrDie((PlayerSAO *)sao, reason);
}
}
if (getintfield(L, -1, "breath_max", prop->breath_max)) {
if (sao->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
PlayerSAO *player = (PlayerSAO *)sao;
if (prop->breath_max < player->getBreath())
player->setBreath(prop->breath_max);
}
}
getboolfield(L, -1, "physical", prop->physical);
getboolfield(L, -1, "collide_with_objects", prop->collideWithObjects);
lua_getfield(L, -1, "collisionbox");
bool collisionbox_defined = lua_istable(L, -1);
if (collisionbox_defined)
prop->collisionbox = read_aabb3f(L, -1, 1.0);
lua_pop(L, 1);
lua_getfield(L, -1, "selectionbox");
if (lua_istable(L, -1))
prop->selectionbox = read_aabb3f(L, -1, 1.0);
else if (collisionbox_defined)
prop->selectionbox = prop->collisionbox;
lua_pop(L, 1);
getboolfield(L, -1, "pointable", prop->pointable);
getstringfield(L, -1, "visual", prop->visual);
getstringfield(L, -1, "mesh", prop->mesh);
lua_getfield(L, -1, "visual_size");
if (lua_istable(L, -1)) {
// Backwards compatibility: Also accept { x = ?, y = ? }
v2f scale_xy = read_v2f(L, -1);
f32 scale_z = scale_xy.X;
lua_getfield(L, -1, "z");
if (lua_isnumber(L, -1))
scale_z = lua_tonumber(L, -1);
lua_pop(L, 1);
prop->visual_size = v3f(scale_xy.X, scale_xy.Y, scale_z);
}
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.emplace_back(lua_tostring(L, -1));
else
prop->textures.emplace_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)) {
int table = lua_gettop(L);
prop->colors.clear();
for (lua_pushnil(L); lua_next(L, table); lua_pop(L, 1)) {
video::SColor color(255, 255, 255, 255);
read_color(L, -1, &color);
prop->colors.push_back(color);
}
}
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);
if (getfloatfield(L, -1, "stepheight", prop->stepheight))
prop->stepheight *= BS;
getfloatfield(L, -1, "eye_height", prop->eye_height);
getfloatfield(L, -1, "automatic_rotate", prop->automatic_rotate);
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);
getboolfield(L, -1, "backface_culling", prop->backface_culling);
getintfield(L, -1, "glow", prop->glow);
getstringfield(L, -1, "nametag", prop->nametag);
lua_getfield(L, -1, "nametag_color");
if (!lua_isnil(L, -1)) {
video::SColor color = prop->nametag_color;
if (read_color(L, -1, &color))
prop->nametag_color = color;
}
lua_pop(L, 1);
lua_getfield(L, -1, "automatic_face_movement_max_rotation_per_sec");
if (lua_isnumber(L, -1)) {
prop->automatic_face_movement_max_rotation_per_sec = luaL_checknumber(L, -1);
}
lua_pop(L, 1);
getstringfield(L, -1, "infotext", prop->infotext);
getboolfield(L, -1, "static_save", prop->static_save);
lua_getfield(L, -1, "wield_item");
if (!lua_isnil(L, -1))
prop->wield_item = read_item(L, -1, idef).getItemString();
lua_pop(L, 1);
getfloatfield(L, -1, "zoom_fov", prop->zoom_fov);
getboolfield(L, -1, "use_texture_alpha", prop->use_texture_alpha);
getboolfield(L, -1, "shaded", prop->shaded);
getstringfield(L, -1, "damage_texture_modifier", prop->damage_texture_modifier);
}
/******************************************************************************/
void push_object_properties(lua_State *L, ObjectProperties *prop)
{
lua_newtable(L);
lua_pushnumber(L, prop->hp_max);
lua_setfield(L, -2, "hp_max");
lua_pushnumber(L, prop->breath_max);
lua_setfield(L, -2, "breath_max");
lua_pushboolean(L, prop->physical);
lua_setfield(L, -2, "physical");
lua_pushboolean(L, prop->collideWithObjects);
lua_setfield(L, -2, "collide_with_objects");
push_aabb3f(L, prop->collisionbox);
lua_setfield(L, -2, "collisionbox");
push_aabb3f(L, prop->selectionbox);
lua_setfield(L, -2, "selectionbox");
lua_pushboolean(L, prop->pointable);
lua_setfield(L, -2, "pointable");
lua_pushlstring(L, prop->visual.c_str(), prop->visual.size());
lua_setfield(L, -2, "visual");
lua_pushlstring(L, prop->mesh.c_str(), prop->mesh.size());
lua_setfield(L, -2, "mesh");
push_v3f(L, prop->visual_size);
lua_setfield(L, -2, "visual_size");
lua_createtable(L, prop->textures.size(), 0);
u16 i = 1;
for (const std::string &texture : prop->textures) {
lua_pushlstring(L, texture.c_str(), texture.size());
lua_rawseti(L, -2, i++);
}
lua_setfield(L, -2, "textures");
lua_createtable(L, prop->colors.size(), 0);
i = 1;
for (const video::SColor &color : prop->colors) {
push_ARGB8(L, color);
lua_rawseti(L, -2, i++);
}
lua_setfield(L, -2, "colors");
push_v2s16(L, prop->spritediv);
lua_setfield(L, -2, "spritediv");
push_v2s16(L, prop->initial_sprite_basepos);
lua_setfield(L, -2, "initial_sprite_basepos");
lua_pushboolean(L, prop->is_visible);
lua_setfield(L, -2, "is_visible");
lua_pushboolean(L, prop->makes_footstep_sound);
lua_setfield(L, -2, "makes_footstep_sound");
lua_pushnumber(L, prop->stepheight / BS);
lua_setfield(L, -2, "stepheight");
lua_pushnumber(L, prop->eye_height);
lua_setfield(L, -2, "eye_height");
lua_pushnumber(L, prop->automatic_rotate);
lua_setfield(L, -2, "automatic_rotate");
if (prop->automatic_face_movement_dir)
lua_pushnumber(L, prop->automatic_face_movement_dir_offset);
else
lua_pushboolean(L, false);
lua_setfield(L, -2, "automatic_face_movement_dir");
lua_pushboolean(L, prop->backface_culling);
lua_setfield(L, -2, "backface_culling");
lua_pushnumber(L, prop->glow);
lua_setfield(L, -2, "glow");
lua_pushlstring(L, prop->nametag.c_str(), prop->nametag.size());
lua_setfield(L, -2, "nametag");
push_ARGB8(L, prop->nametag_color);
lua_setfield(L, -2, "nametag_color");
lua_pushnumber(L, prop->automatic_face_movement_max_rotation_per_sec);
lua_setfield(L, -2, "automatic_face_movement_max_rotation_per_sec");
lua_pushlstring(L, prop->infotext.c_str(), prop->infotext.size());
lua_setfield(L, -2, "infotext");
lua_pushboolean(L, prop->static_save);
lua_setfield(L, -2, "static_save");
lua_pushlstring(L, prop->wield_item.c_str(), prop->wield_item.size());
lua_setfield(L, -2, "wield_item");
lua_pushnumber(L, prop->zoom_fov);
lua_setfield(L, -2, "zoom_fov");
lua_pushboolean(L, prop->use_texture_alpha);
lua_setfield(L, -2, "use_texture_alpha");
lua_pushboolean(L, prop->shaded);
lua_setfield(L, -2, "shaded");
lua_pushlstring(L, prop->damage_texture_modifier.c_str(), prop->damage_texture_modifier.size());
lua_setfield(L, -2, "damage_texture_modifier");
}
/******************************************************************************/
TileDef read_tiledef(lua_State *L, int index, u8 drawtype)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
TileDef tiledef;
bool default_tiling = true;
bool default_culling = true;
switch (drawtype) {
case NDT_PLANTLIKE:
case NDT_PLANTLIKE_ROOTED:
case NDT_FIRELIKE:
default_tiling = false;
// "break" is omitted here intentionaly, as PLANTLIKE
// FIRELIKE drawtype both should default to having
// backface_culling to false.
case NDT_MESH:
case NDT_LIQUID:
default_culling = false;
break;
default:
break;
}
// key at index -2 and value at index
if(lua_isstring(L, index)){
// "default_lava.png"
tiledef.name = lua_tostring(L, index);
tiledef.tileable_vertical = default_tiling;
tiledef.tileable_horizontal = default_tiling;
tiledef.backface_culling = default_culling;
}
else if(lua_istable(L, index))
{
// name="default_lava.png"
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", default_culling);
tiledef.tileable_horizontal = getboolfield_default(
L, index, "tileable_horizontal", default_tiling);
tiledef.tileable_vertical = getboolfield_default(
L, index, "tileable_vertical", default_tiling);
std::string align_style;
if (getstringfield(L, index, "align_style", align_style)) {
if (align_style == "user")
tiledef.align_style = ALIGN_STYLE_USER_DEFINED;
else if (align_style == "world")
tiledef.align_style = ALIGN_STYLE_WORLD;
else
tiledef.align_style = ALIGN_STYLE_NODE;
}
tiledef.scale = getintfield_default(L, index, "scale", 0);
// color = ...
lua_getfield(L, index, "color");
tiledef.has_color = read_color(L, -1, &tiledef.color);
lua_pop(L, 1);
// animation = {}
lua_getfield(L, index, "animation");
tiledef.animation = read_animation_definition(L, -1);
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);
/* Meshnode model filename */
getstringfield(L, index, "mesh", f.mesh);
// 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, f.drawtype);
// 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);
// overlay_tiles = {}
lua_getfield(L, index, "overlay_tiles");
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_overlay[i] = read_tiledef(L, -1, f.drawtype);
// 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_overlay[i - 1];
while (i < 6) {
f.tiledef_overlay[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, f.drawtype);
// 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;
// Read node color.
lua_getfield(L, index, "color");
read_color(L, -1, &f.color);
lua_pop(L, 1);
getstringfield(L, index, "palette", f.palette_name);
/* Other stuff */
lua_getfield(L, index, "post_effect_color");
read_color(L, -1, &f.post_effect_color);
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);
if (!f.palette_name.empty() &&
!(f.param_type_2 == CPT2_COLOR ||
f.param_type_2 == CPT2_COLORED_FACEDIR ||
f.param_type_2 == CPT2_COLORED_WALLMOUNTED))
warningstream << "Node " << f.name.c_str()
<< " has a palette, but not a suitable paramtype2." << std::endl;
// Warn about some obsolete fields
warn_if_field_exists(L, index, "wall_mounted",
"Obsolete; use paramtype2 = 'wallmounted'");
warn_if_field_exists(L, index, "light_propagates",
"Obsolete; determined from paramtype");
warn_if_field_exists(L, index, "dug_item",
"Obsolete; use 'drop' field");
warn_if_field_exists(L, index, "extra_dug_item",
"Obsolete; use 'drop' field");
warn_if_field_exists(L, index, "extra_dug_item_rarity",
"Obsolete; use 'drop' field");
warn_if_field_exists(L, index, "metadata_name",
"Obsolete; 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);
// Liquids flow into and replace node
getboolfield(L, index, "floodable", f.floodable);
// 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);
f.leveled_max = getintfield_default(L, index,
"leveled_max", f.leveled_max);
getboolfield(L, index, "liquid_renewable", f.liquid_renewable);
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);
if (f.light_source > LIGHT_MAX) {
warningstream << "Node " << f.name.c_str()
<< " had greater light_source than " << LIGHT_MAX
<< ", it was reduced." << std::endl;
f.light_source = LIGHT_MAX;
}
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, "connects_to");
if (lua_istable(L, -1)) {
int table = lua_gettop(L);
lua_pushnil(L);
while (lua_next(L, table) != 0) {
// Value at -1
f.connects_to.emplace_back(lua_tostring(L, -1));
lua_pop(L, 1);
}
}
lua_pop(L, 1);
lua_getfield(L, index, "connect_sides");
if (lua_istable(L, -1)) {
int table = lua_gettop(L);
lua_pushnil(L);
while (lua_next(L, table) != 0) {
// Value at -1
std::string side(lua_tostring(L, -1));
// Note faces are flipped to make checking easier
if (side == "top")
f.connect_sides |= 2;
else if (side == "bottom")
f.connect_sides |= 1;
else if (side == "front")
f.connect_sides |= 16;
else if (side == "left")
f.connect_sides |= 32;
else if (side == "back")
f.connect_sides |= 4;
else if (side == "right")
f.connect_sides |= 8;
else
warningstream << "Unknown value for \"connect_sides\": "
<< side << std::endl;
lua_pop(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);
lua_getfield(L, index, "collision_box");
if(lua_istable(L, -1))
f.collision_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);
// Node immediately placed by client when node is dug
getstringfield(L, index, "node_dig_prediction",
f.node_dig_prediction);
return f;
}
void push_content_features(lua_State *L, const ContentFeatures &c)
{
std::string paramtype(ScriptApiNode::es_ContentParamType[(int)c.param_type].str);
std::string paramtype2(ScriptApiNode::es_ContentParamType2[(int)c.param_type_2].str);
std::string drawtype(ScriptApiNode::es_DrawType[(int)c.drawtype].str);
std::string liquid_type(ScriptApiNode::es_LiquidType[(int)c.liquid_type].str);
/* Missing "tiles" because I don't see a usecase (at least not yet). */
lua_newtable(L);
lua_pushboolean(L, c.has_on_construct);
lua_setfield(L, -2, "has_on_construct");
lua_pushboolean(L, c.has_on_destruct);
lua_setfield(L, -2, "has_on_destruct");
lua_pushboolean(L, c.has_after_destruct);
lua_setfield(L, -2, "has_after_destruct");
lua_pushstring(L, c.name.c_str());
lua_setfield(L, -2, "name");
push_groups(L, c.groups);
lua_setfield(L, -2, "groups");
lua_pushstring(L, paramtype.c_str());
lua_setfield(L, -2, "paramtype");
lua_pushstring(L, paramtype2.c_str());
lua_setfield(L, -2, "paramtype2");
lua_pushstring(L, drawtype.c_str());
lua_setfield(L, -2, "drawtype");
if (!c.mesh.empty()) {
lua_pushstring(L, c.mesh.c_str());
lua_setfield(L, -2, "mesh");
}
#ifndef SERVER
push_ARGB8(L, c.minimap_color); // I know this is not set-able w/ register_node,
lua_setfield(L, -2, "minimap_color"); // but the people need to know!
#endif
lua_pushnumber(L, c.visual_scale);
lua_setfield(L, -2, "visual_scale");
lua_pushnumber(L, c.alpha);
lua_setfield(L, -2, "alpha");
if (!c.palette_name.empty()) {
push_ARGB8(L, c.color);
lua_setfield(L, -2, "color");
lua_pushstring(L, c.palette_name.c_str());
lua_setfield(L, -2, "palette_name");
push_palette(L, c.palette);
lua_setfield(L, -2, "palette");
}
lua_pushnumber(L, c.waving);
lua_setfield(L, -2, "waving");
lua_pushnumber(L, c.connect_sides);
lua_setfield(L, -2, "connect_sides");
lua_createtable(L, c.connects_to.size(), 0);
u16 i = 1;
for (const std::string &it : c.connects_to) {
lua_pushlstring(L, it.c_str(), it.size());
lua_rawseti(L, -2, i++);
}
lua_setfield(L, -2, "connects_to");
push_ARGB8(L, c.post_effect_color);
lua_setfield(L, -2, "post_effect_color");
lua_pushnumber(L, c.leveled);
lua_setfield(L, -2, "leveled");
lua_pushnumber(L, c.leveled_max);
lua_setfield(L, -2, "leveled_max");
lua_pushboolean(L, c.sunlight_propagates);
lua_setfield(L, -2, "sunlight_propagates");
lua_pushnumber(L, c.light_source);
lua_setfield(L, -2, "light_source");
lua_pushboolean(L, c.is_ground_content);
lua_setfield(L, -2, "is_ground_content");
lua_pushboolean(L, c.walkable);
lua_setfield(L, -2, "walkable");
lua_pushboolean(L, c.pointable);
lua_setfield(L, -2, "pointable");
lua_pushboolean(L, c.diggable);
lua_setfield(L, -2, "diggable");
lua_pushboolean(L, c.climbable);
lua_setfield(L, -2, "climbable");
lua_pushboolean(L, c.buildable_to);
lua_setfield(L, -2, "buildable_to");
lua_pushboolean(L, c.rightclickable);
lua_setfield(L, -2, "rightclickable");
lua_pushnumber(L, c.damage_per_second);
lua_setfield(L, -2, "damage_per_second");
if (c.isLiquid()) {
lua_pushstring(L, liquid_type.c_str());
lua_setfield(L, -2, "liquid_type");
lua_pushstring(L, c.liquid_alternative_flowing.c_str());
lua_setfield(L, -2, "liquid_alternative_flowing");
lua_pushstring(L, c.liquid_alternative_source.c_str());
lua_setfield(L, -2, "liquid_alternative_source");
lua_pushnumber(L, c.liquid_viscosity);
lua_setfield(L, -2, "liquid_viscosity");
lua_pushboolean(L, c.liquid_renewable);
lua_setfield(L, -2, "liquid_renewable");
lua_pushnumber(L, c.liquid_range);
lua_setfield(L, -2, "liquid_range");
}
lua_pushnumber(L, c.drowning);
lua_setfield(L, -2, "drowning");
lua_pushboolean(L, c.floodable);
lua_setfield(L, -2, "floodable");
push_nodebox(L, c.node_box);
lua_setfield(L, -2, "node_box");
push_nodebox(L, c.selection_box);
lua_setfield(L, -2, "selection_box");
push_nodebox(L, c.collision_box);
lua_setfield(L, -2, "collision_box");
lua_newtable(L);
push_soundspec(L, c.sound_footstep);
lua_setfield(L, -2, "sound_footstep");
push_soundspec(L, c.sound_dig);
lua_setfield(L, -2, "sound_dig");
push_soundspec(L, c.sound_dug);
lua_setfield(L, -2, "sound_dug");
lua_setfield(L, -2, "sounds");
lua_pushboolean(L, c.legacy_facedir_simple);
lua_setfield(L, -2, "legacy_facedir_simple");
lua_pushboolean(L, c.legacy_wallmounted);
lua_setfield(L, -2, "legacy_wallmounted");
lua_pushstring(L, c.node_dig_prediction.c_str());
lua_setfield(L, -2, "node_dig_prediction");
}
/******************************************************************************/
void push_nodebox(lua_State *L, const NodeBox &box)
{
lua_newtable(L);
switch (box.type)
{
case NODEBOX_REGULAR:
lua_pushstring(L, "regular");
lua_setfield(L, -2, "type");
break;
case NODEBOX_LEVELED:
case NODEBOX_FIXED:
lua_pushstring(L, "fixed");
lua_setfield(L, -2, "type");
push_box(L, box.fixed);
lua_setfield(L, -2, "fixed");
break;
case NODEBOX_WALLMOUNTED:
lua_pushstring(L, "wallmounted");
lua_setfield(L, -2, "type");
push_aabb3f(L, box.wall_top);
lua_setfield(L, -2, "wall_top");
push_aabb3f(L, box.wall_bottom);
lua_setfield(L, -2, "wall_bottom");
push_aabb3f(L, box.wall_side);
lua_setfield(L, -2, "wall_side");
break;
case NODEBOX_CONNECTED:
lua_pushstring(L, "connected");
lua_setfield(L, -2, "type");
push_box(L, box.connect_top);
lua_setfield(L, -2, "connect_top");
push_box(L, box.connect_bottom);
lua_setfield(L, -2, "connect_bottom");
push_box(L, box.connect_front);
lua_setfield(L, -2, "connect_front");
push_box(L, box.connect_back);
lua_setfield(L, -2, "connect_back");
push_box(L, box.connect_left);
lua_setfield(L, -2, "connect_left");
push_box(L, box.connect_right);
lua_setfield(L, -2, "connect_right");
break;
default:
FATAL_ERROR("Invalid box.type");
break;
}
}
void push_box(lua_State *L, const std::vector<aabb3f> &box)
{
lua_createtable(L, box.size(), 0);
u8 i = 1;
for (const aabb3f &it : box) {
push_aabb3f(L, it);
lua_rawseti(L, -2, i++);
}
}
/******************************************************************************/
void push_palette(lua_State *L, const std::vector<video::SColor> *palette)
{
lua_createtable(L, palette->size(), 0);
int newTable = lua_gettop(L);
int index = 1;
std::vector<video::SColor>::const_iterator iter;
for (iter = palette->begin(); iter != palette->end(); ++iter) {
push_ARGB8(L, (*iter));
lua_rawseti(L, newTable, index);
index++;
}
}
/******************************************************************************/
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);
getfloatfield(L, index, "fade", params.fade);
getfloatfield(L, index, "pitch", params.pitch);
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);
getstringfield(L, index, "exclude_player", params.exclude_player);
}
}
/******************************************************************************/
void read_soundspec(lua_State *L, int index, SimpleSoundSpec &spec)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if (lua_isnil(L, index))
return;
if (lua_istable(L, index)) {
getstringfield(L, index, "name", spec.name);
getfloatfield(L, index, "gain", spec.gain);
getfloatfield(L, index, "fade", spec.fade);
getfloatfield(L, index, "pitch", spec.pitch);
} else if (lua_isstring(L, index)) {
spec.name = lua_tostring(L, index);
}
}
void push_soundspec(lua_State *L, const SimpleSoundSpec &spec)
{
lua_createtable(L, 0, 3);
lua_pushstring(L, spec.name.c_str());
lua_setfield(L, -2, "name");
lua_pushnumber(L, spec.gain);
lua_setfield(L, -2, "gain");
lua_pushnumber(L, spec.fade);
lua_setfield(L, -2, "fade");
lua_pushnumber(L, spec.pitch);
lua_setfield(L, -2, "pitch");
}
/******************************************************************************/
NodeBox read_nodebox(lua_State *L, int index)
{
NodeBox nodebox;
if (lua_isnil(L, -1))
return nodebox;
luaL_checktype(L, -1, LUA_TTABLE);
nodebox.type = (NodeBoxType)getenumfield(L, index, "type",
ScriptApiNode::es_NodeBoxType, NODEBOX_REGULAR);
#define NODEBOXREAD(n, s){ \
lua_getfield(L, index, (s)); \
if (lua_istable(L, -1)) \
(n) = read_aabb3f(L, -1, BS); \
lua_pop(L, 1); \
}
#define NODEBOXREADVEC(n, s) \
lua_getfield(L, index, (s)); \
if (lua_istable(L, -1)) \
(n) = read_aabb3f_vector(L, -1, BS); \
lua_pop(L, 1);
NODEBOXREADVEC(nodebox.fixed, "fixed");
NODEBOXREAD(nodebox.wall_top, "wall_top");
NODEBOXREAD(nodebox.wall_bottom, "wall_bottom");
NODEBOXREAD(nodebox.wall_side, "wall_side");
NODEBOXREADVEC(nodebox.connect_top, "connect_top");
NODEBOXREADVEC(nodebox.connect_bottom, "connect_bottom");
NODEBOXREADVEC(nodebox.connect_front, "connect_front");
NODEBOXREADVEC(nodebox.connect_left, "connect_left");
NODEBOXREADVEC(nodebox.connect_back, "connect_back");
NODEBOXREADVEC(nodebox.connect_right, "connect_right");
NODEBOXREADVEC(nodebox.disconnected_top, "disconnected_top");
NODEBOXREADVEC(nodebox.disconnected_bottom, "disconnected_bottom");
NODEBOXREADVEC(nodebox.disconnected_front, "disconnected_front");
NODEBOXREADVEC(nodebox.disconnected_left, "disconnected_left");
NODEBOXREADVEC(nodebox.disconnected_back, "disconnected_back");
NODEBOXREADVEC(nodebox.disconnected_right, "disconnected_right");
NODEBOXREADVEC(nodebox.disconnected, "disconnected");
NODEBOXREADVEC(nodebox.disconnected_sides, "disconnected_sides");
return nodebox;
}
/******************************************************************************/
MapNode readnode(lua_State *L, int index, const NodeDefManager *ndef)
{
lua_getfield(L, index, "name");
if (!lua_isstring(L, -1))
throw LuaError("Node name is not set or is not a string!");
std::string name = lua_tostring(L, -1);
lua_pop(L, 1);
u8 param1 = 0;
lua_getfield(L, index, "param1");
if (!lua_isnil(L, -1))
param1 = lua_tonumber(L, -1);
lua_pop(L, 1);
u8 param2 = 0;
lua_getfield(L, index, "param2");
if (!lua_isnil(L, -1))
param2 = lua_tonumber(L, -1);
lua_pop(L, 1);
content_t id = CONTENT_IGNORE;
if (!ndef->getId(name, id))
throw LuaError("\"" + name + "\" is not a registered node!");
return {id, param1, param2};
}
/******************************************************************************/
void pushnode(lua_State *L, const MapNode &n, const NodeDefManager *ndef)
{
lua_createtable(L, 0, 3);
lua_pushstring(L, ndef->get(n).name.c_str());
lua_setfield(L, -2, "name");
lua_pushinteger(L, n.getParam1());
lua_setfield(L, -2, "param1");
lua_pushinteger(L, n.getParam2());
lua_setfield(L, -2, "param2");
}
/******************************************************************************/
void warn_if_field_exists(lua_State *L, int table,
const char *name, const std::string &message)
{
lua_getfield(L, table, name);
if (!lua_isnil(L, -1)) {
warningstream << "Field \"" << name << "\": "
<< message << std::endl;
infostream << script_get_backtrace(L) << 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 (!strcmp(str.c_str(), esp->str)) {
result = esp->num;
return true;
}
esp++;
}
return false;
}
/******************************************************************************/
ItemStack read_item(lua_State* L, int index, IItemDefManager *idef)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
if (lua_isnil(L, index)) {
return ItemStack();
}
if (lua_isuserdata(L, index)) {
// Convert from LuaItemStack
LuaItemStack *o = LuaItemStack::checkobject(L, index);
return o->getItem();
}
if (lua_isstring(L, index)) {
// Convert from itemstring
std::string itemstring = lua_tostring(L, index);
try
{
ItemStack item;
item.deSerialize(itemstring, idef);
return item;
}
catch(SerializationError &e)
{
warningstream<<"unable to create item from itemstring"
<<": "<<itemstring<<std::endl;
return ItemStack();
}
}
else if(lua_istable(L, index))
{
// Convert from table
std::string name = getstringfield_default(L, index, "name", "");
int count = getintfield_default(L, index, "count", 1);
int wear = getintfield_default(L, index, "wear", 0);
ItemStack istack(name, count, wear, idef);
// BACKWARDS COMPATIBLITY
std::string value = getstringfield_default(L, index, "metadata", "");
istack.metadata.setString("", value);
// Get meta
lua_getfield(L, index, "meta");
int fieldstable = lua_gettop(L);
if (lua_istable(L, fieldstable)) {
lua_pushnil(L);
while (lua_next(L, fieldstable) != 0) {
// key at index -2 and value at index -1
std::string key = lua_tostring(L, -2);
size_t value_len;
const char *value_cs = lua_tolstring(L, -1, &value_len);
std::string value(value_cs, value_len);
istack.metadata.setString(key, value);
lua_pop(L, 1); // removes value, keeps key for next iteration
}
}
return istack;
} 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);
setintfield(L, -1, "punch_attack_uses", toolcap.punch_attack_uses);
// Create groupcaps table
lua_newtable(L);
// For each groupcap
for (const auto &gc_it : toolcap.groupcaps) {
// Create groupcap table
lua_newtable(L);
const std::string &name = gc_it.first;
const ToolGroupCap &groupcap = gc_it.second;
// Create subtable "times"
lua_newtable(L);
for (auto time : groupcap.times) {
lua_pushinteger(L, time.first);
lua_pushnumber(L, time.second);
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 (const auto &damageGroup : toolcap.damageGroups) {
// Create damage group table
lua_pushinteger(L, damageGroup.second);
lua_setfield(L, -2, damageGroup.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++;
}
}
/******************************************************************************/
struct TileAnimationParams read_animation_definition(lua_State *L, int index)
{
if(index < 0)
index = lua_gettop(L) + 1 + index;
struct TileAnimationParams anim;
anim.type = TAT_NONE;
if (!lua_istable(L, index))
return anim;
anim.type = (TileAnimationType)
getenumfield(L, index, "type", es_TileAnimationType,
TAT_NONE);
if (anim.type == TAT_VERTICAL_FRAMES) {
// {type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0}
anim.vertical_frames.aspect_w =
getintfield_default(L, index, "aspect_w", 16);
anim.vertical_frames.aspect_h =
getintfield_default(L, index, "aspect_h", 16);
anim.vertical_frames.length =
getfloatfield_default(L, index, "length", 1.0);
} else if (anim.type == TAT_SHEET_2D) {
// {type="sheet_2d", frames_w=5, frames_h=3, frame_length=0.5}
getintfield(L, index, "frames_w",
anim.sheet_2d.frames_w);
getintfield(L, index, "frames_h",
anim.sheet_2d.frames_h);
getfloatfield(L, index, "frame_length",
anim.sheet_2d.frame_length);
}
return anim;
}
/******************************************************************************/
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);
getintfield(L, table, "punch_attack_uses", toolcap.punch_attack_uses);
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;
warningstream << "Field \"maxwear\" is deprecated; "
<< "replace with uses=1/maxwear" << std::endl;
infostream << script_get_backtrace(L) << 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_createtable(L, 0, 3);
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_createtable(L, 0, 3);
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;
}
void push_flags_string(lua_State *L, FlagDesc *flagdesc, u32 flags, u32 flagmask)
{
std::string flagstring = writeFlagString(flags, flagdesc, flagmask);
lua_pushlstring(L, flagstring.c_str(), flagstring.size());
}
/******************************************************************************/
/* Lua Stored data! */
/******************************************************************************/
/******************************************************************************/
void read_groups(lua_State *L, int index, ItemGroupList &result)
{
if (lua_isnil(L, index))
return;
luaL_checktype(L, index, LUA_TTABLE);
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);
// zero rating indicates not in the group
if (rating != 0)
result[name] = rating;
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
/******************************************************************************/
void push_groups(lua_State *L, const ItemGroupList &groups)
{
lua_createtable(L, 0, groups.size());
for (const auto &group : groups) {
lua_pushinteger(L, group.second);
lua_setfield(L, -2, group.first.c_str());
}
}
/******************************************************************************/
void push_items(lua_State *L, const std::vector<ItemStack> &items)
{
lua_createtable(L, items.size(), 0);
for (u32 i = 0; i != items.size(); i++) {
LuaItemStack::create(L, items[i]);
lua_rawseti(L, -2, i + 1);
}
}
/******************************************************************************/
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->idef());
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_pushinteger(L, id);
lua_gettable(L, -2);
lua_remove(L, -2); // Remove luaentities
lua_remove(L, -2); // Remove core
}
/******************************************************************************/
bool read_noiseparams(lua_State *L, int index, NoiseParams *np)
{
if (index < 0)
index = lua_gettop(L) + 1 + index;
if (!lua_istable(L, index))
return false;
getfloatfield(L, index, "offset", np->offset);
getfloatfield(L, index, "scale", np->scale);
getfloatfield(L, index, "persist", np->persist);
getfloatfield(L, index, "persistence", np->persist);
getfloatfield(L, index, "lacunarity", np->lacunarity);
getintfield(L, index, "seed", np->seed);
getintfield(L, index, "octaves", np->octaves);
u32 flags = 0;
u32 flagmask = 0;
np->flags = getflagsfield(L, index, "flags", flagdesc_noiseparams,
&flags, &flagmask) ? flags : NOISE_FLAG_DEFAULTS;
lua_getfield(L, index, "spread");
np->spread = read_v3f(L, -1);
lua_pop(L, 1);
return true;
}
void push_noiseparams(lua_State *L, NoiseParams *np)
{
lua_newtable(L);
push_float_string(L, np->offset);
lua_setfield(L, -2, "offset");
push_float_string(L, np->scale);
lua_setfield(L, -2, "scale");
push_float_string(L, np->persist);
lua_setfield(L, -2, "persistence");
push_float_string(L, np->lacunarity);
lua_setfield(L, -2, "lacunarity");
lua_pushnumber(L, np->seed);
lua_setfield(L, -2, "seed");
lua_pushnumber(L, np->octaves);
lua_setfield(L, -2, "octaves");
push_flags_string(L, flagdesc_noiseparams, np->flags,
np->flags);
lua_setfield(L, -2, "flags");
push_v3_float_string(L, np->spread);
lua_setfield(L, -2, "spread");
}
/******************************************************************************/
// 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 (const auto &it : value) {
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.asLargestInt());
break;
case Json::uintValue:
lua_pushinteger(L, value.asLargestUInt());
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_createtable(L, value.size(), 0);
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_createtable(L, 0, value.size());
for (Json::Value::const_iterator it = value.begin();
it != value.end(); ++it) {
#if !defined(JSONCPP_STRING) && (JSONCPP_VERSION_MAJOR < 1 || JSONCPP_VERSION_MINOR < 9)
const char *str = it.memberName();
lua_pushstring(L, str ? str : "");
#else
std::string str = it.name();
lua_pushstring(L, str.c_str());
#endif
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);
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
}
void push_pointed_thing(lua_State *L, const PointedThing &pointed, bool csm,
bool hitpoint)
{
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");
if (csm) {
lua_pushinteger(L, pointed.object_id);
lua_setfield(L, -2, "id");
} else {
push_objectRef(L, pointed.object_id);
lua_setfield(L, -2, "ref");
}
} else {
lua_pushstring(L, "nothing");
lua_setfield(L, -2, "type");
}
if (hitpoint && (pointed.type != POINTEDTHING_NOTHING)) {
push_v3f(L, pointed.intersection_point / BS); // convert to node coords
lua_setfield(L, -2, "intersection_point");
push_v3s16(L, pointed.intersection_normal);
lua_setfield(L, -2, "intersection_normal");
lua_pushinteger(L, pointed.box_id + 1); // change to Lua array index
lua_setfield(L, -2, "box_id");
}
}
void push_objectRef(lua_State *L, const u16 id)
{
// Get core.object_refs[i]
lua_getglobal(L, "core");
lua_getfield(L, -1, "object_refs");
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushinteger(L, id);
lua_gettable(L, -2);
lua_remove(L, -2); // object_refs
lua_remove(L, -2); // core
}
void read_hud_element(lua_State *L, HudElement *elem)
{
elem->type = (HudElementType)getenumfield(L, 2, "hud_elem_type",
es_HudElementType, HUD_ELEM_TEXT);
lua_getfield(L, 2, "position");
elem->pos = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
lua_pop(L, 1);
lua_getfield(L, 2, "scale");
elem->scale = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
lua_pop(L, 1);
lua_getfield(L, 2, "size");
elem->size = lua_istable(L, -1) ? read_v2s32(L, -1) : v2s32();
lua_pop(L, 1);
elem->name = getstringfield_default(L, 2, "name", "");
elem->text = getstringfield_default(L, 2, "text", "");
elem->number = getintfield_default(L, 2, "number", 0);
if (elem->type == HUD_ELEM_WAYPOINT)
// waypoints reuse the item field to store precision, item = precision + 1
elem->item = getintfield_default(L, 2, "precision", -1) + 1;
else
elem->item = getintfield_default(L, 2, "item", 0);
elem->dir = getintfield_default(L, 2, "direction", 0);
elem->z_index = MYMAX(S16_MIN, MYMIN(S16_MAX,
getintfield_default(L, 2, "z_index", 0)));
elem->text2 = getstringfield_default(L, 2, "text2", "");
// Deprecated, only for compatibility's sake
if (elem->dir == 0)
elem->dir = getintfield_default(L, 2, "dir", 0);
lua_getfield(L, 2, "alignment");
elem->align = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
lua_pop(L, 1);
lua_getfield(L, 2, "offset");
elem->offset = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
lua_pop(L, 1);
lua_getfield(L, 2, "world_pos");
elem->world_pos = lua_istable(L, -1) ? read_v3f(L, -1) : v3f();
lua_pop(L, 1);
/* check for known deprecated element usage */
if ((elem->type == HUD_ELEM_STATBAR) && (elem->size == v2s32()))
log_deprecated(L,"Deprecated usage of statbar without size!");
}
void push_hud_element(lua_State *L, HudElement *elem)
{
lua_newtable(L);
lua_pushstring(L, es_HudElementType[(u8)elem->type].str);
lua_setfield(L, -2, "type");
push_v2f(L, elem->pos);
lua_setfield(L, -2, "position");
lua_pushstring(L, elem->name.c_str());
lua_setfield(L, -2, "name");
push_v2f(L, elem->scale);
lua_setfield(L, -2, "scale");
lua_pushstring(L, elem->text.c_str());
lua_setfield(L, -2, "text");
lua_pushnumber(L, elem->number);
lua_setfield(L, -2, "number");
lua_pushnumber(L, elem->item);
lua_setfield(L, -2, "item");
lua_pushnumber(L, elem->dir);
lua_setfield(L, -2, "direction");
push_v2f(L, elem->offset);
lua_setfield(L, -2, "offset");
push_v2f(L, elem->align);
lua_setfield(L, -2, "alignment");
push_v2s32(L, elem->size);
lua_setfield(L, -2, "size");
// Deprecated, only for compatibility's sake
lua_pushnumber(L, elem->dir);
lua_setfield(L, -2, "dir");
push_v3f(L, elem->world_pos);
lua_setfield(L, -2, "world_pos");
lua_pushnumber(L, elem->z_index);
lua_setfield(L, -2, "z_index");
lua_pushstring(L, elem->text2.c_str());
lua_setfield(L, -2, "text2");
}
HudElementStat read_hud_change(lua_State *L, HudElement *elem, void **value)
{
HudElementStat stat = HUD_STAT_NUMBER;
if (lua_isstring(L, 3)) {
int statint;
std::string statstr = lua_tostring(L, 3);
stat = string_to_enum(es_HudElementStat, statint, statstr) ?
(HudElementStat)statint : stat;
}
switch (stat) {
case HUD_STAT_POS:
elem->pos = read_v2f(L, 4);
*value = &elem->pos;
break;
case HUD_STAT_NAME:
elem->name = luaL_checkstring(L, 4);
*value = &elem->name;
break;
case HUD_STAT_SCALE:
elem->scale = read_v2f(L, 4);
*value = &elem->scale;
break;
case HUD_STAT_TEXT:
elem->text = luaL_checkstring(L, 4);
*value = &elem->text;
break;
case HUD_STAT_NUMBER:
elem->number = luaL_checknumber(L, 4);
*value = &elem->number;
break;
case HUD_STAT_ITEM:
elem->item = luaL_checknumber(L, 4);
*value = &elem->item;
break;
case HUD_STAT_DIR:
elem->dir = luaL_checknumber(L, 4);
*value = &elem->dir;
break;
case HUD_STAT_ALIGN:
elem->align = read_v2f(L, 4);
*value = &elem->align;
break;
case HUD_STAT_OFFSET:
elem->offset = read_v2f(L, 4);
*value = &elem->offset;
break;
case HUD_STAT_WORLD_POS:
elem->world_pos = read_v3f(L, 4);
*value = &elem->world_pos;
break;
case HUD_STAT_SIZE:
elem->size = read_v2s32(L, 4);
*value = &elem->size;
break;
case HUD_STAT_Z_INDEX:
elem->z_index = MYMAX(S16_MIN, MYMIN(S16_MAX, luaL_checknumber(L, 4)));
*value = &elem->z_index;
break;
case HUD_STAT_TEXT2:
elem->text2 = luaL_checkstring(L, 4);
*value = &elem->text2;
break;
}
return stat;
}
/******************************************************************************/
// Indices must match values in `enum CollisionType` exactly!!
static const char *collision_type_str[] = {
"node",
"object",
};
// Indices must match values in `enum CollisionAxis` exactly!!
static const char *collision_axis_str[] = {
"x",
"y",
"z",
};
void push_collision_move_result(lua_State *L, const collisionMoveResult &res)
{
lua_createtable(L, 0, 4);
setboolfield(L, -1, "touching_ground", res.touching_ground);
setboolfield(L, -1, "collides", res.collides);
setboolfield(L, -1, "standing_on_object", res.standing_on_object);
/* collisions */
lua_createtable(L, res.collisions.size(), 0);
int i = 1;
for (const auto &c : res.collisions) {
lua_createtable(L, 0, 5);
lua_pushstring(L, collision_type_str[c.type]);
lua_setfield(L, -2, "type");
assert(c.axis != COLLISION_AXIS_NONE);
lua_pushstring(L, collision_axis_str[c.axis]);
lua_setfield(L, -2, "axis");
if (c.type == COLLISION_NODE) {
push_v3s16(L, c.node_p);
lua_setfield(L, -2, "node_pos");
} else if (c.type == COLLISION_OBJECT) {
push_objectRef(L, c.object->getId());
lua_setfield(L, -2, "object");
}
push_v3f(L, c.old_speed / BS);
lua_setfield(L, -2, "old_velocity");
push_v3f(L, c.new_speed / BS);
lua_setfield(L, -2, "new_velocity");
lua_rawseti(L, -2, i++);
}
lua_setfield(L, -2, "collisions");
/**/
}
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