forked from Mirrorlandia_minetest/minetest
718 lines
15 KiB
C++
718 lines
15 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "lua_api/l_noise.h"
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#include "lua_api/l_internal.h"
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#include "common/c_converter.h"
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#include "common/c_content.h"
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#include "log.h"
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#include "porting.h"
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#include "util/numeric.h"
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///////////////////////////////////////
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/*
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LuaPerlinNoise
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*/
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LuaPerlinNoise::LuaPerlinNoise(NoiseParams *params) :
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np(*params)
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{
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}
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LuaPerlinNoise::~LuaPerlinNoise()
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{
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}
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int LuaPerlinNoise::l_get2d(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPerlinNoise *o = checkobject(L, 1);
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v2f p = check_v2f(L, 2);
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lua_Number val = NoisePerlin2D(&o->np, p.X, p.Y, 0);
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lua_pushnumber(L, val);
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return 1;
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}
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int LuaPerlinNoise::l_get3d(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPerlinNoise *o = checkobject(L, 1);
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v3f p = check_v3f(L, 2);
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lua_Number val = NoisePerlin3D(&o->np, p.X, p.Y, p.Z, 0);
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lua_pushnumber(L, val);
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return 1;
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}
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int LuaPerlinNoise::create_object(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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NoiseParams params;
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if (lua_istable(L, 1)) {
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read_noiseparams(L, 1, ¶ms);
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} else {
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params.seed = luaL_checkint(L, 1);
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params.octaves = luaL_checkint(L, 2);
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params.persist = luaL_checknumber(L, 3);
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params.spread = v3f(1, 1, 1) * luaL_checknumber(L, 4);
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}
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LuaPerlinNoise *o = new LuaPerlinNoise(¶ms);
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*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
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luaL_getmetatable(L, className);
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lua_setmetatable(L, -2);
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return 1;
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}
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int LuaPerlinNoise::gc_object(lua_State *L)
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{
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LuaPerlinNoise *o = *(LuaPerlinNoise **)(lua_touserdata(L, 1));
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delete o;
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return 0;
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}
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LuaPerlinNoise *LuaPerlinNoise::checkobject(lua_State *L, int narg)
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{
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NO_MAP_LOCK_REQUIRED;
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luaL_checktype(L, narg, LUA_TUSERDATA);
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void *ud = luaL_checkudata(L, narg, className);
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if (!ud)
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luaL_typerror(L, narg, className);
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return *(LuaPerlinNoise **)ud;
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}
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void LuaPerlinNoise::Register(lua_State *L)
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{
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lua_newtable(L);
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int methodtable = lua_gettop(L);
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luaL_newmetatable(L, className);
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int metatable = lua_gettop(L);
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lua_pushliteral(L, "__metatable");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable);
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lua_pushliteral(L, "__index");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable);
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lua_pushliteral(L, "__gc");
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lua_pushcfunction(L, gc_object);
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lua_settable(L, metatable);
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lua_pop(L, 1);
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luaL_openlib(L, 0, methods, 0);
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lua_pop(L, 1);
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lua_register(L, className, create_object);
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}
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const char LuaPerlinNoise::className[] = "PerlinNoise";
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const luaL_Reg LuaPerlinNoise::methods[] = {
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luamethod(LuaPerlinNoise, get2d),
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luamethod(LuaPerlinNoise, get3d),
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{0,0}
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};
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///////////////////////////////////////
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/*
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LuaPerlinNoiseMap
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*/
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LuaPerlinNoiseMap::LuaPerlinNoiseMap(NoiseParams *params, s32 seed, v3s16 size)
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{
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m_is3d = size.Z > 1;
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np = *params;
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try {
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noise = new Noise(&np, seed, size.X, size.Y, size.Z);
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} catch (InvalidNoiseParamsException &e) {
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throw LuaError(e.what());
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}
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}
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LuaPerlinNoiseMap::~LuaPerlinNoiseMap()
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{
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delete noise;
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}
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int LuaPerlinNoiseMap::l_get2dMap(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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size_t i = 0;
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LuaPerlinNoiseMap *o = checkobject(L, 1);
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v2f p = check_v2f(L, 2);
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Noise *n = o->noise;
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n->perlinMap2D(p.X, p.Y);
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lua_newtable(L);
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for (u32 y = 0; y != n->sy; y++) {
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lua_newtable(L);
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for (u32 x = 0; x != n->sx; x++) {
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lua_pushnumber(L, n->result[i++]);
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lua_rawseti(L, -2, x + 1);
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}
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lua_rawseti(L, -2, y + 1);
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}
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return 1;
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}
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int LuaPerlinNoiseMap::l_get2dMap_flat(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPerlinNoiseMap *o = checkobject(L, 1);
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v2f p = check_v2f(L, 2);
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bool use_buffer = lua_istable(L, 3);
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Noise *n = o->noise;
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n->perlinMap2D(p.X, p.Y);
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size_t maplen = n->sx * n->sy;
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if (use_buffer)
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lua_pushvalue(L, 3);
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else
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lua_newtable(L);
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for (size_t i = 0; i != maplen; i++) {
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lua_pushnumber(L, n->result[i]);
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lua_rawseti(L, -2, i + 1);
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}
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return 1;
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}
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int LuaPerlinNoiseMap::l_get3dMap(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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size_t i = 0;
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LuaPerlinNoiseMap *o = checkobject(L, 1);
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v3f p = check_v3f(L, 2);
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if (!o->m_is3d)
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return 0;
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Noise *n = o->noise;
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n->perlinMap3D(p.X, p.Y, p.Z);
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lua_newtable(L);
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for (u32 z = 0; z != n->sz; z++) {
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lua_newtable(L);
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for (u32 y = 0; y != n->sy; y++) {
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lua_newtable(L);
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for (u32 x = 0; x != n->sx; x++) {
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lua_pushnumber(L, n->result[i++]);
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lua_rawseti(L, -2, x + 1);
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}
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lua_rawseti(L, -2, y + 1);
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}
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lua_rawseti(L, -2, z + 1);
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}
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return 1;
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}
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int LuaPerlinNoiseMap::l_get3dMap_flat(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPerlinNoiseMap *o = checkobject(L, 1);
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v3f p = check_v3f(L, 2);
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bool use_buffer = lua_istable(L, 3);
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if (!o->m_is3d)
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return 0;
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Noise *n = o->noise;
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n->perlinMap3D(p.X, p.Y, p.Z);
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size_t maplen = n->sx * n->sy * n->sz;
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if (use_buffer)
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lua_pushvalue(L, 3);
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else
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lua_newtable(L);
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for (size_t i = 0; i != maplen; i++) {
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lua_pushnumber(L, n->result[i]);
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lua_rawseti(L, -2, i + 1);
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}
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return 1;
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}
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int LuaPerlinNoiseMap::l_calc2dMap(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPerlinNoiseMap *o = checkobject(L, 1);
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v2f p = check_v2f(L, 2);
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Noise *n = o->noise;
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n->perlinMap2D(p.X, p.Y);
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return 0;
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}
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int LuaPerlinNoiseMap::l_calc3dMap(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPerlinNoiseMap *o = checkobject(L, 1);
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v3f p = check_v3f(L, 2);
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if (!o->m_is3d)
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return 0;
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Noise *n = o->noise;
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n->perlinMap3D(p.X, p.Y, p.Z);
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return 0;
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}
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int LuaPerlinNoiseMap::l_getMapSlice(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPerlinNoiseMap *o = checkobject(L, 1);
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v3s16 slice_offset = read_v3s16(L, 2);
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v3s16 slice_size = read_v3s16(L, 3);
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bool use_buffer = lua_istable(L, 4);
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Noise *n = o->noise;
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if (use_buffer)
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lua_pushvalue(L, 3);
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else
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lua_newtable(L);
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write_array_slice_float(L, lua_gettop(L), n->result,
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v3u16(n->sx, n->sy, n->sz),
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v3u16(slice_offset.X, slice_offset.Y, slice_offset.Z),
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v3u16(slice_size.X, slice_size.Y, slice_size.Z));
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return 1;
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}
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int LuaPerlinNoiseMap::create_object(lua_State *L)
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{
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NoiseParams np;
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if (!read_noiseparams(L, 1, &np))
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return 0;
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v3s16 size = read_v3s16(L, 2);
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LuaPerlinNoiseMap *o = new LuaPerlinNoiseMap(&np, 0, size);
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*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
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luaL_getmetatable(L, className);
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lua_setmetatable(L, -2);
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return 1;
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}
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int LuaPerlinNoiseMap::gc_object(lua_State *L)
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{
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LuaPerlinNoiseMap *o = *(LuaPerlinNoiseMap **)(lua_touserdata(L, 1));
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delete o;
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return 0;
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}
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LuaPerlinNoiseMap *LuaPerlinNoiseMap::checkobject(lua_State *L, int narg)
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{
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luaL_checktype(L, narg, LUA_TUSERDATA);
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void *ud = luaL_checkudata(L, narg, className);
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if (!ud)
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luaL_typerror(L, narg, className);
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return *(LuaPerlinNoiseMap **)ud;
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}
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void LuaPerlinNoiseMap::Register(lua_State *L)
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{
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lua_newtable(L);
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int methodtable = lua_gettop(L);
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luaL_newmetatable(L, className);
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int metatable = lua_gettop(L);
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lua_pushliteral(L, "__metatable");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable);
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lua_pushliteral(L, "__index");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable);
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lua_pushliteral(L, "__gc");
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lua_pushcfunction(L, gc_object);
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lua_settable(L, metatable);
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lua_pop(L, 1);
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luaL_openlib(L, 0, methods, 0);
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lua_pop(L, 1);
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lua_register(L, className, create_object);
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}
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const char LuaPerlinNoiseMap::className[] = "PerlinNoiseMap";
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const luaL_Reg LuaPerlinNoiseMap::methods[] = {
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luamethod(LuaPerlinNoiseMap, get2dMap),
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luamethod(LuaPerlinNoiseMap, get2dMap_flat),
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luamethod(LuaPerlinNoiseMap, calc2dMap),
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luamethod(LuaPerlinNoiseMap, get3dMap),
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luamethod(LuaPerlinNoiseMap, get3dMap_flat),
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luamethod(LuaPerlinNoiseMap, calc3dMap),
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luamethod(LuaPerlinNoiseMap, getMapSlice),
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{0,0}
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};
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///////////////////////////////////////
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/*
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LuaPseudoRandom
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*/
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int LuaPseudoRandom::l_next(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPseudoRandom *o = checkobject(L, 1);
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int min = 0;
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int max = 32767;
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lua_settop(L, 3);
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if (lua_isnumber(L, 2))
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min = luaL_checkinteger(L, 2);
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if (lua_isnumber(L, 3))
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max = luaL_checkinteger(L, 3);
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if (max < min) {
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errorstream<<"PseudoRandom.next(): max="<<max<<" min="<<min<<std::endl;
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throw LuaError("PseudoRandom.next(): max < min");
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}
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if(max - min != 32767 && max - min > 32767/5)
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throw LuaError("PseudoRandom.next() max-min is not 32767"
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" and is > 32768/5. This is disallowed due to"
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" the bad random distribution the"
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" implementation would otherwise make.");
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PseudoRandom &pseudo = o->m_pseudo;
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int val = pseudo.next();
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val = (val % (max-min+1)) + min;
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lua_pushinteger(L, val);
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return 1;
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}
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int LuaPseudoRandom::create_object(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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u64 seed = luaL_checknumber(L, 1);
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LuaPseudoRandom *o = new LuaPseudoRandom(seed);
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*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
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luaL_getmetatable(L, className);
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lua_setmetatable(L, -2);
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return 1;
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}
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int LuaPseudoRandom::gc_object(lua_State *L)
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{
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LuaPseudoRandom *o = *(LuaPseudoRandom **)(lua_touserdata(L, 1));
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delete o;
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return 0;
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}
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LuaPseudoRandom *LuaPseudoRandom::checkobject(lua_State *L, int narg)
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{
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luaL_checktype(L, narg, LUA_TUSERDATA);
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void *ud = luaL_checkudata(L, narg, className);
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if (!ud)
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luaL_typerror(L, narg, className);
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return *(LuaPseudoRandom **)ud;
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}
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void LuaPseudoRandom::Register(lua_State *L)
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{
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lua_newtable(L);
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int methodtable = lua_gettop(L);
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luaL_newmetatable(L, className);
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int metatable = lua_gettop(L);
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lua_pushliteral(L, "__metatable");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable);
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lua_pushliteral(L, "__index");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable);
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lua_pushliteral(L, "__gc");
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lua_pushcfunction(L, gc_object);
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lua_settable(L, metatable);
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lua_pop(L, 1);
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luaL_openlib(L, 0, methods, 0);
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lua_pop(L, 1);
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lua_register(L, className, create_object);
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}
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const char LuaPseudoRandom::className[] = "PseudoRandom";
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const luaL_Reg LuaPseudoRandom::methods[] = {
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luamethod(LuaPseudoRandom, next),
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{0,0}
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};
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///////////////////////////////////////
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/*
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LuaPcgRandom
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*/
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int LuaPcgRandom::l_next(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPcgRandom *o = checkobject(L, 1);
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u32 min = lua_isnumber(L, 2) ? lua_tointeger(L, 2) : o->m_rnd.RANDOM_MIN;
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u32 max = lua_isnumber(L, 3) ? lua_tointeger(L, 3) : o->m_rnd.RANDOM_MAX;
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lua_pushinteger(L, o->m_rnd.range(min, max));
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return 1;
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}
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int LuaPcgRandom::l_rand_normal_dist(lua_State *L)
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{
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NO_MAP_LOCK_REQUIRED;
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LuaPcgRandom *o = checkobject(L, 1);
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u32 min = lua_isnumber(L, 2) ? lua_tointeger(L, 2) : o->m_rnd.RANDOM_MIN;
|
|
u32 max = lua_isnumber(L, 3) ? lua_tointeger(L, 3) : o->m_rnd.RANDOM_MAX;
|
|
int num_trials = lua_isnumber(L, 4) ? lua_tointeger(L, 4) : 6;
|
|
|
|
lua_pushinteger(L, o->m_rnd.randNormalDist(min, max, num_trials));
|
|
return 1;
|
|
}
|
|
|
|
|
|
int LuaPcgRandom::create_object(lua_State *L)
|
|
{
|
|
NO_MAP_LOCK_REQUIRED;
|
|
|
|
u64 seed = luaL_checknumber(L, 1);
|
|
LuaPcgRandom *o = lua_isnumber(L, 2) ?
|
|
new LuaPcgRandom(seed, lua_tointeger(L, 2)) :
|
|
new LuaPcgRandom(seed);
|
|
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
|
|
luaL_getmetatable(L, className);
|
|
lua_setmetatable(L, -2);
|
|
return 1;
|
|
}
|
|
|
|
|
|
int LuaPcgRandom::gc_object(lua_State *L)
|
|
{
|
|
LuaPcgRandom *o = *(LuaPcgRandom **)(lua_touserdata(L, 1));
|
|
delete o;
|
|
return 0;
|
|
}
|
|
|
|
|
|
LuaPcgRandom *LuaPcgRandom::checkobject(lua_State *L, int narg)
|
|
{
|
|
luaL_checktype(L, narg, LUA_TUSERDATA);
|
|
void *ud = luaL_checkudata(L, narg, className);
|
|
if (!ud)
|
|
luaL_typerror(L, narg, className);
|
|
return *(LuaPcgRandom **)ud;
|
|
}
|
|
|
|
|
|
void LuaPcgRandom::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);
|
|
|
|
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);
|
|
|
|
luaL_openlib(L, 0, methods, 0);
|
|
lua_pop(L, 1);
|
|
|
|
lua_register(L, className, create_object);
|
|
}
|
|
|
|
|
|
const char LuaPcgRandom::className[] = "PcgRandom";
|
|
const luaL_Reg LuaPcgRandom::methods[] = {
|
|
luamethod(LuaPcgRandom, next),
|
|
luamethod(LuaPcgRandom, rand_normal_dist),
|
|
{0,0}
|
|
};
|
|
|
|
///////////////////////////////////////
|
|
/*
|
|
LuaSecureRandom
|
|
*/
|
|
|
|
bool LuaSecureRandom::fillRandBuf()
|
|
{
|
|
return porting::secure_rand_fill_buf(m_rand_buf, RAND_BUF_SIZE);
|
|
}
|
|
|
|
int LuaSecureRandom::l_next_bytes(lua_State *L)
|
|
{
|
|
NO_MAP_LOCK_REQUIRED;
|
|
|
|
LuaSecureRandom *o = checkobject(L, 1);
|
|
u32 count = lua_isnumber(L, 2) ? lua_tointeger(L, 2) : 1;
|
|
|
|
// Limit count
|
|
count = MYMIN(RAND_BUF_SIZE, count);
|
|
|
|
// Find out whether we can pass directly from our array, or have to do some gluing
|
|
size_t count_remaining = RAND_BUF_SIZE - o->m_rand_idx;
|
|
if (count_remaining >= count) {
|
|
lua_pushlstring(L, o->m_rand_buf + o->m_rand_idx, count);
|
|
o->m_rand_idx += count;
|
|
} else {
|
|
char output_buf[RAND_BUF_SIZE];
|
|
|
|
// Copy over with what we have left from our current buffer
|
|
memcpy(output_buf, o->m_rand_buf + o->m_rand_idx, count_remaining);
|
|
|
|
// Refill buffer and copy over the remainder of what was requested
|
|
o->fillRandBuf();
|
|
memcpy(output_buf + count_remaining, o->m_rand_buf, count - count_remaining);
|
|
|
|
// Update index
|
|
o->m_rand_idx = count - count_remaining;
|
|
|
|
lua_pushlstring(L, output_buf, count);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
int LuaSecureRandom::create_object(lua_State *L)
|
|
{
|
|
LuaSecureRandom *o = new LuaSecureRandom();
|
|
|
|
// Fail and return nil if we can't securely fill the buffer
|
|
if (!o->fillRandBuf()) {
|
|
delete o;
|
|
return 0;
|
|
}
|
|
|
|
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
|
|
luaL_getmetatable(L, className);
|
|
lua_setmetatable(L, -2);
|
|
return 1;
|
|
}
|
|
|
|
|
|
int LuaSecureRandom::gc_object(lua_State *L)
|
|
{
|
|
LuaSecureRandom *o = *(LuaSecureRandom **)(lua_touserdata(L, 1));
|
|
delete o;
|
|
return 0;
|
|
}
|
|
|
|
|
|
LuaSecureRandom *LuaSecureRandom::checkobject(lua_State *L, int narg)
|
|
{
|
|
luaL_checktype(L, narg, LUA_TUSERDATA);
|
|
void *ud = luaL_checkudata(L, narg, className);
|
|
if (!ud)
|
|
luaL_typerror(L, narg, className);
|
|
return *(LuaSecureRandom **)ud;
|
|
}
|
|
|
|
|
|
void LuaSecureRandom::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);
|
|
|
|
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);
|
|
|
|
luaL_openlib(L, 0, methods, 0);
|
|
lua_pop(L, 1);
|
|
|
|
lua_register(L, className, create_object);
|
|
}
|
|
|
|
const char LuaSecureRandom::className[] = "SecureRandom";
|
|
const luaL_Reg LuaSecureRandom::methods[] = {
|
|
luamethod(LuaSecureRandom, next_bytes),
|
|
{0,0}
|
|
};
|