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-rw-r--r--src/script/cpp_api/s_entity.cpp267
1 files changed, 267 insertions, 0 deletions
diff --git a/src/script/cpp_api/s_entity.cpp b/src/script/cpp_api/s_entity.cpp
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index 000000000..2a5a6066d
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+++ b/src/script/cpp_api/s_entity.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 "cpp_api/s_entity.h"
+#include "log.h"
+#include "object_properties.h"
+#include "common/c_converter.h"
+#include "common/c_content.h"
+
+extern "C" {
+#include "lauxlib.h"
+}
+
+bool ScriptApiEntity::luaentity_Add(u16 id, const char *name)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ verbosestream<<"scriptapi_luaentity_add: id="<<id<<" name=\""
+ <<name<<"\""<<std::endl;
+
+ // Get minetest.registered_entities[name]
+ lua_getglobal(L, "minetest");
+ lua_getfield(L, -1, "registered_entities");
+ luaL_checktype(L, -1, LUA_TTABLE);
+ lua_pushstring(L, name);
+ lua_gettable(L, -2);
+ // Should be a table, which we will use as a prototype
+ //luaL_checktype(L, -1, LUA_TTABLE);
+ if(lua_type(L, -1) != LUA_TTABLE){
+ errorstream<<"LuaEntity name \""<<name<<"\" not defined"<<std::endl;
+ return false;
+ }
+ int prototype_table = lua_gettop(L);
+ //dump2(L, "prototype_table");
+
+ // Create entity object
+ lua_newtable(L);
+ int object = lua_gettop(L);
+
+ // Set object metatable
+ lua_pushvalue(L, prototype_table);
+ lua_setmetatable(L, -2);
+
+ // Add object reference
+ // This should be userdata with metatable ObjectRef
+ objectrefGet(id);
+ luaL_checktype(L, -1, LUA_TUSERDATA);
+ if(!luaL_checkudata(L, -1, "ObjectRef"))
+ luaL_typerror(L, -1, "ObjectRef");
+ lua_setfield(L, -2, "object");
+
+ // minetest.luaentities[id] = object
+ lua_getglobal(L, "minetest");
+ lua_getfield(L, -1, "luaentities");
+ luaL_checktype(L, -1, LUA_TTABLE);
+ lua_pushnumber(L, id); // Push id
+ lua_pushvalue(L, object); // Copy object to top of stack
+ lua_settable(L, -3);
+
+ return true;
+}
+
+void ScriptApiEntity::luaentity_Activate(u16 id,
+ const std::string &staticdata, u32 dtime_s)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ verbosestream<<"scriptapi_luaentity_activate: id="<<id<<std::endl;
+
+ // Get minetest.luaentities[id]
+ luaentity_get(L,id);
+ int object = lua_gettop(L);
+
+ // Get on_activate function
+ lua_pushvalue(L, object);
+ lua_getfield(L, -1, "on_activate");
+ if(!lua_isnil(L, -1)){
+ luaL_checktype(L, -1, LUA_TFUNCTION);
+ lua_pushvalue(L, object); // self
+ lua_pushlstring(L, staticdata.c_str(), staticdata.size());
+ lua_pushinteger(L, dtime_s);
+ // Call with 3 arguments, 0 results
+ if(lua_pcall(L, 3, 0, 0))
+ scriptError("error running function on_activate: %s\n",
+ lua_tostring(L, -1));
+ }
+}
+
+void ScriptApiEntity::luaentity_Remove(u16 id)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ verbosestream<<"scriptapi_luaentity_rm: id="<<id<<std::endl;
+
+ // Get minetest.luaentities table
+ lua_getglobal(L, "minetest");
+ lua_getfield(L, -1, "luaentities");
+ luaL_checktype(L, -1, LUA_TTABLE);
+ int objectstable = lua_gettop(L);
+
+ // Set luaentities[id] = nil
+ lua_pushnumber(L, id); // Push id
+ lua_pushnil(L);
+ lua_settable(L, objectstable);
+
+ lua_pop(L, 2); // pop luaentities, minetest
+}
+
+std::string ScriptApiEntity::luaentity_GetStaticdata(u16 id)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ //infostream<<"scriptapi_luaentity_get_staticdata: id="<<id<<std::endl;
+
+ // Get minetest.luaentities[id]
+ luaentity_get(L,id);
+ int object = lua_gettop(L);
+
+ // Get get_staticdata function
+ lua_pushvalue(L, object);
+ lua_getfield(L, -1, "get_staticdata");
+ if(lua_isnil(L, -1))
+ return "";
+
+ luaL_checktype(L, -1, LUA_TFUNCTION);
+ lua_pushvalue(L, object); // self
+ // Call with 1 arguments, 1 results
+ if(lua_pcall(L, 1, 1, 0))
+ scriptError("error running function get_staticdata: %s\n",
+ lua_tostring(L, -1));
+
+ size_t len=0;
+ const char *s = lua_tolstring(L, -1, &len);
+ return std::string(s, len);
+}
+
+void ScriptApiEntity::luaentity_GetProperties(u16 id,
+ ObjectProperties *prop)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ //infostream<<"scriptapi_luaentity_get_properties: id="<<id<<std::endl;
+
+ // Get minetest.luaentities[id]
+ luaentity_get(L,id);
+ //int object = lua_gettop(L);
+
+ // Set default values that differ from ObjectProperties defaults
+ prop->hp_max = 10;
+
+ /* Read stuff */
+
+ prop->hp_max = getintfield_default(L, -1, "hp_max", 10);
+
+ getboolfield(L, -1, "physical", prop->physical);
+
+ getfloatfield(L, -1, "weight", prop->weight);
+
+ lua_getfield(L, -1, "collisionbox");
+ if(lua_istable(L, -1))
+ prop->collisionbox = read_aabb3f(L, -1, 1.0);
+ lua_pop(L, 1);
+
+ getstringfield(L, -1, "visual", prop->visual);
+
+ getstringfield(L, -1, "mesh", prop->mesh);
+
+ // Deprecated: read object properties directly
+ read_object_properties(L, -1, prop);
+
+ // Read initial_properties
+ lua_getfield(L, -1, "initial_properties");
+ read_object_properties(L, -1, prop);
+ lua_pop(L, 1);
+}
+
+void ScriptApiEntity::luaentity_Step(u16 id, float dtime)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ //infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
+
+ // Get minetest.luaentities[id]
+ luaentity_get(L,id);
+ int object = lua_gettop(L);
+ // State: object is at top of stack
+ // Get step function
+ lua_getfield(L, -1, "on_step");
+ if(lua_isnil(L, -1))
+ return;
+ luaL_checktype(L, -1, LUA_TFUNCTION);
+ lua_pushvalue(L, object); // self
+ lua_pushnumber(L, dtime); // dtime
+ // Call with 2 arguments, 0 results
+ if(lua_pcall(L, 2, 0, 0))
+ scriptError("error running function 'on_step': %s\n", lua_tostring(L, -1));
+}
+
+// Calls entity:on_punch(ObjectRef puncher, time_from_last_punch,
+// tool_capabilities, direction)
+void ScriptApiEntity::luaentity_Punch(u16 id,
+ ServerActiveObject *puncher, float time_from_last_punch,
+ const ToolCapabilities *toolcap, v3f dir)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ //infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
+
+ // Get minetest.luaentities[id]
+ luaentity_get(L,id);
+ int object = lua_gettop(L);
+ // State: object is at top of stack
+ // Get function
+ lua_getfield(L, -1, "on_punch");
+ if(lua_isnil(L, -1))
+ return;
+ luaL_checktype(L, -1, LUA_TFUNCTION);
+ lua_pushvalue(L, object); // self
+ objectrefGetOrCreate(puncher); // Clicker reference
+ lua_pushnumber(L, time_from_last_punch);
+ push_tool_capabilities(L, *toolcap);
+ push_v3f(L, dir);
+ // Call with 5 arguments, 0 results
+ if(lua_pcall(L, 5, 0, 0))
+ scriptError("error running function 'on_punch': %s\n", lua_tostring(L, -1));
+}
+
+// Calls entity:on_rightclick(ObjectRef clicker)
+void ScriptApiEntity::luaentity_Rightclick(u16 id,
+ ServerActiveObject *clicker)
+{
+ SCRIPTAPI_PRECHECKHEADER
+
+ //infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
+
+ // Get minetest.luaentities[id]
+ luaentity_get(L,id);
+ int object = lua_gettop(L);
+ // State: object is at top of stack
+ // Get function
+ lua_getfield(L, -1, "on_rightclick");
+ if(lua_isnil(L, -1))
+ return;
+ luaL_checktype(L, -1, LUA_TFUNCTION);
+ lua_pushvalue(L, object); // self
+ objectrefGetOrCreate(clicker); // Clicker reference
+ // Call with 2 arguments, 0 results
+ if(lua_pcall(L, 2, 0, 0))
+ scriptError("error running function 'on_rightclick': %s\n", lua_tostring(L, -1));
+}
+