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
new file mode 100644
index 000000000..2a5a6066d
--- /dev/null
+++ b/src/script/cpp_api/s_entity.cpp
@@ -0,0 +1,267 @@
+/*
+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));
+}
+