src/player.cpp

/*
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 "lua_api/l_noise.h"
#include "lua_api/l_internal.h"
#include "common/c_converter.h"
#include "common/c_content.h"
#include "log.h"

// garbage collector
int LuaPerlinNoise::gc_object(lua_State *L)
{
	LuaPerlinNoise *o = *(LuaPerlinNoise **)(lua_touserdata(L, 1));
	delete o;
	return 0;
}

int LuaPerlinNoise::l_get2d(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	LuaPerlinNoise *o = checkobject(L, 1);
	v2f pos2d = read_v2f(L,2);
	lua_Number val = noise2d_perlin(pos2d.X/o->scale, pos2d.Y/o->scale, o->seed, o->octaves, o->persistence);
	lua_pushnumber(L, val);
	return 1;
}
int LuaPerlinNoise::l_get3d(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	LuaPerlinNoise *o = checkobject(L, 1);
	v3f pos3d = read_v3f(L,2);
	lua_Number val = noise3d_perlin(pos3d.X/o->scale, pos3d.Y/o->scale, pos3d.Z/o->scale, o->seed, o->octaves, o->persistence);
	lua_pushnumber(L, val);
	return 1;
}


LuaPerlinNoise::LuaPerlinNoise(int a_seed, int a_octaves, float a_persistence,
		float a_scale):
	seed(a_seed),
	octaves(a_octaves),
	persistence(a_persistence),
	scale(a_scale)
{
}

LuaPerlinNoise::~LuaPerlinNoise()
{
}

// LuaPerlinNoise(seed, octaves, persistence, scale)
// Creates an LuaPerlinNoise and leaves it on top of stack
int LuaPerlinNoise::create_object(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	int seed = luaL_checkint(L, 1);
	int octaves = luaL_checkint(L, 2);
	float persistence = luaL_checknumber(L, 3);
	float scale = luaL_checknumber(L, 4);
	LuaPerlinNoise *o = new LuaPerlinNoise(seed, octaves, persistence, scale);
	*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
	luaL_getmetatable(L, className);
	lua_setmetatable(L, -2);
	return 1;
}

LuaPerlinNoise* LuaPerlinNoise::checkobject(lua_State *L, int narg)
{
	NO_MAP_LOCK_REQUIRED;
	luaL_checktype(L, narg, LUA_TUSERDATA);
	void *ud = luaL_checkudata(L, narg, className);
	if(!ud) luaL_typerror(L, narg, className);
	return *(LuaPerlinNoise**)ud;  // unbox pointer
}

void LuaPerlinNoise::Register(lua_State *L)
{
	lua_newtable(L);
	int methodtable = lua_gettop(L);
	luaL_newmetatable(L, className);
	int metatable = lua_gettop(L);

	lua_pushliteral(L, "__metatable");
	lua_pushvalue(L, methodtable);
	lua_settable(L, metatable);  // hide metatable from Lua getmetatable()

	lua_pushliteral(L, "__index");
	lua_pushvalue(L, methodtable);
	lua_settable(L, metatable);

	lua_pushliteral(L, "__gc");
	lua_pushcfunction(L, gc_object);
	lua_settable(L, metatable);

	lua_pop(L, 1);  // drop metatable

	luaL_openlib(L, 0, methods, 0);  // fill methodtable
	lua_pop(L, 1);  // drop methodtable

	// Can be created from Lua (PerlinNoise(seed, octaves, persistence)
	lua_register(L, className, create_object);
}

const char LuaPerlinNoise::className[] = "PerlinNoise";
const luaL_reg LuaPerlinNoise::methods[] = {
	luamethod(LuaPerlinNoise, get2d),
	luamethod(LuaPerlinNoise, get3d),
	{0,0}
};

/*
  PerlinNoiseMap
 */


int LuaPerlinNoiseMap::gc_object(lua_State *L)
{
	LuaPerlinNoiseMap *o = *(LuaPerlinNoiseMap **)(lua_touserdata(L, 1));
	delete o;
	return 0;
}

int LuaPerlinNoiseMap::l_get2dMap(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	int i = 0;

	LuaPerlinNoiseMap *o = checkobject(L, 1);
	v2f p = read_v2f(L, 2);

	Noise *n = o->noise;
	n->perlinMap2D(p.X, p.Y);

	lua_newtable(L);
	for (int y = 0; y != n->sy; y++) {
		lua_newtable(L);
		for (int x = 0; x != n->sx; x++) {
			float noiseval = n->np->offset + n->np->scale * n->result[i++];
			lua_pushnumber(L, noiseval);
			lua_rawseti(L, -2, x + 1);
		}
		lua_rawseti(L, -2, y + 1);
	}
	return 1;
}

int LuaPerlinNoiseMap::l_get2dMap_flat(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;

	LuaPerlinNoiseMap *o = checkobject(L, 1);
	v2f p = read_v2f(L, 2);

	Noise *n = o->noise;
	n->perlinMap2D(p.X, p.Y);

	int maplen = n->sx * n->sy;
	
	lua_newtable(L);
	for (int i = 0; i != maplen; i++) {
	Commit message (Collapse)	Author	Age
*	Faster lighting at map generation time	Perttu Ahola	2011-01-24
\|
*	old water removed, some fixes here and there	Perttu Ahola	2011-01-17
\|
*	fine-tuning of map generator and server and stuff.	Perttu Ahola	2011-01-17
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*	Initial commit of mapgen v.2. Lacks configuration and saving to disk.	Perttu Ahola	2011-01-16
\|
*	Players are left on server while server is running. No passwords yet.	Perttu Ahola	2011-01-15
\|
*	Added a more flexible path system (and fixed some minor stuff)	Perttu Ahola	2011-01-07
\|
*	added fog to players	Perttu Ahola	2010-12-22
\|
*	crafting system!	Perttu Ahola	2010-12-22
\|
*	just savin'	Perttu Ahola	2010-12-22
\|
*	some work-in-progress	Perttu Ahola	2010-12-22
\|
*	added dedicated server build without irrlicht	Perttu Ahola	2010-12-19
\|
*	working nicely	Perttu Ahola	2010-12-13
\|
*	better water	Perttu Ahola	2010-11-30
\|
*	license stuff	Perttu Ahola	2010-11-29
\| \| \| \| \|	--HG-- rename : src/licensecomment.txt => licensecomment.txt
*	Initial files	Perttu Ahola	2010-11-27