diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/scriptapi.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/scriptapi.cpp b/src/scriptapi.cpp index 87526678f..7ce10c415 100644 --- a/src/scriptapi.cpp +++ b/src/scriptapi.cpp @@ -2877,6 +2877,120 @@ static void objectref_get_or_create(lua_State *L, } } + +/* + PerlinNoise + */ + +class LuaPerlinNoise +{ +private: + int seed; + int octaves; + double persistence; + double scale; + static const char className[]; + static const luaL_reg methods[]; + + // Exported functions + + // garbage collector + static int gc_object(lua_State *L) + { + LuaPerlinNoise *o = *(LuaPerlinNoise **)(lua_touserdata(L, 1)); + delete o; + return 0; + } + + static int l_get2d(lua_State *L) + { + 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; + } + static int l_get3d(lua_State *L) + { + 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; + } + +public: + LuaPerlinNoise(int a_seed, int a_octaves, double a_persistence, + double a_scale): + seed(a_seed), + octaves(a_octaves), + persistence(a_persistence), + scale(a_scale) + { + } + + ~LuaPerlinNoise() + { + } + + // LuaPerlinNoise(seed, octaves, persistence, scale) + // Creates an LuaPerlinNoise and leaves it on top of stack + static int create_object(lua_State *L) + { + int seed = luaL_checkint(L, 1); + int octaves = luaL_checkint(L, 2); + double persistence = luaL_checknumber(L, 3); + double 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; + } + + static LuaPerlinNoise* 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 *(LuaPerlinNoise**)ud; // unbox pointer + } + + static void 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[] = { + method(LuaPerlinNoise, get2d), + method(LuaPerlinNoise, get3d), + {0,0} +}; + /* EnvRef */ @@ -3190,6 +3304,7 @@ private: return 1; } + // EnvRef:find_node_near(pos, radius, nodenames) -> pos or nil // nodenames: eg. {"ignore", "group:tree"} or "default:dirt" static int l_find_node_near(lua_State *L) @@ -3231,6 +3346,26 @@ private: return 0; } + // EnvRef:get_perlin(seeddiff, octaves, persistence, scale) + // returns world-specific PerlinNoise + static int l_get_perlin(lua_State *L) + { + EnvRef *o = checkobject(L, 1); + ServerEnvironment *env = o->m_env; + if(env == NULL) return 0; + + int seeddiff = luaL_checkint(L, 2); + int octaves = luaL_checkint(L, 3); + double persistence = luaL_checknumber(L, 4); + double scale = luaL_checknumber(L, 5); + + LuaPerlinNoise *n = new LuaPerlinNoise(seeddiff + int(env->getServerMap().getSeed()), octaves, persistence, scale); + *(void **)(lua_newuserdata(L, sizeof(void *))) = n; + luaL_getmetatable(L, "PerlinNoise"); + lua_setmetatable(L, -2); + return 1; + } + public: EnvRef(ServerEnvironment *env): m_env(env) @@ -3306,6 +3441,7 @@ const luaL_reg EnvRef::methods[] = { method(EnvRef, set_timeofday), method(EnvRef, get_timeofday), method(EnvRef, find_node_near), + method(EnvRef, get_perlin), {0,0} }; @@ -3313,6 +3449,7 @@ const luaL_reg EnvRef::methods[] = { LuaPseudoRandom */ + class LuaPseudoRandom { private: @@ -3424,6 +3561,8 @@ const luaL_reg LuaPseudoRandom::methods[] = { {0,0} }; + + /* LuaABM */ @@ -4129,6 +4268,7 @@ void scriptapi_export(lua_State *L, Server *server) ObjectRef::Register(L); EnvRef::Register(L); LuaPseudoRandom::Register(L); + LuaPerlinNoise::Register(L); } bool scriptapi_loadmod(lua_State *L, const std::string &scriptpath, |