games/devtest/mods/testnodes/textures/testnodes_normal5.png

/*
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 "cpp_api/s_internal.h"
#include "log.h"
#include "object_properties.h"
#include "common/c_converter.h"
#include "common/c_content.h"

bool ScriptApiEntity::luaentity_Add(u16 id, const char *name)
{
	SCRIPTAPI_PRECHECKHEADER

	verbosestream<<"scriptapi_luaentity_add: id="<<id<<" name=\""
			<<name<<"\""<<std::endl;

	// Get core.registered_entities[name]
	lua_getglobal(L, "core");
	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(L, id);
	luaL_checktype(L, -1, LUA_TUSERDATA);
	if (!luaL_checkudata(L, -1, "ObjectRef"))
		luaL_typerror(L, -1, "ObjectRef");
	lua_setfield(L, -2, "object");

	// core.luaentities[id] = object
	lua_getglobal(L, "core");
	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 core.luaentities[id]
	luaentity_get(L, id);
	int object = lua_gettop(L);

	// Get on_activate function
	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);

		setOriginFromTable(object);
		PCALL_RES(lua_pcall(L, 3, 0, m_errorhandler));
	} else {
		lua_pop(L, 1);
	}
	lua_pop(L, 1); // Pop object
}

void ScriptApiEntity::luaentity_Remove(u16 id)
{
	SCRIPTAPI_PRECHECKHEADER

	verbosestream << "scriptapi_luaentity_rm: id=" << id << std::endl;

	// Get core.luaentities table
	lua_getglobal(L, "core");
	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, core
}

std::string ScriptApiEntity::luaentity_GetStaticdata(u16 id)
{
	SCRIPTAPI_PRECHECKHEADER

	//infostream<<"scriptapi_luaentity_get_staticdata: id="<<id<<std::endl;

	// Get core.luaentities[id]
	luaentity_get(L, id);
	int object = lua_gettop(L);

	// Get get_staticdata function
	lua_getfield(L, -1, "get_staticdata");
	if (lua_isnil(L, -1)) {
		lua_pop(L, 2); // Pop entity and  get_staticdata
		return "";
	}
	luaL_checktype(L, -1, LUA_TFUNCTION);
	lua_pushvalue(L, object); // self

	setOriginFromTable(object);
	PCALL_RES(lua_pcall(L, 1, 1, m_errorhandler));

	lua_remove(L, object); // Remove object

	size_t len = 0;
	const char *s = lua_tolstring(L, -1, &len);
	lua_pop(L, 1); // Pop static data
	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 core.luaentities[id]
	luaentity_get(L, id);

	// 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);
	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);

	// 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 core.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)) {
		lua_pop(L, 2); // Pop on_step and entity
		return;
	}
	luaL_checktype(L, -1, LUA_TFUNCTION);
	lua_pushvalue(L, object); // self
	lua_pushnumber(L, dtime); // dtime

	setOriginFromTable(object);
	PCALL_RES(lua_pcall(L, 2, 0, m_errorhandler));

	lua_pop(L, 1); // Pop object
}

// 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 core.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)) {
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 10 00 00 00 10 08 02 00 00 00 90 91 68	.PNG........IHDR...............h
0020	36 00 00 00 34 49 44 41 54 78 01 63 f8 cf c0 f0 9f 14 c0 00 c2 44 03 24 0d ff 6f 13 44 d4 d2 80	6...4IDATx.c.........D.$..o.D...
0040	0a 08 6b 40 53 44 57 0d 94 fb 01 13 0d 16 0d a8 80 d2 98 26 2f f1 91 08 00 6e e4 95 1c 73 73 f5	..k@SDW............&/....n...ss.
0060	e4 00 00 00 00 49 45 4e 44 ae 42 60 82	.....IEND.B`.