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SAPI/Noise: Add PerlinNoiseMap:getMapSlice() function

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This adds the ability to grab 'slices' of noise calculated by PerlinNoiseMap.
Retrieving smaller slices of noise from the computation result as needed
optimizes memory usage while maintaining a reasonable amount of CPU overhead.
This commit is contained in:
kwolekr 2015-05-17 03:38:39 -04:00
parent c0edb8e313
commit 4c9a8a91c4
6 changed files with 178 additions and 4 deletions
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58
src/script/lua_api/l_noise.cpp
View file

@ -272,6 +272,61 @@ int LuaPerlinNoiseMap::l_get3dMap_flat(lua_State *L)
}
int LuaPerlinNoiseMap::l_calc2dMap(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
LuaPerlinNoiseMap *o = checkobject(L, 1);
v2f p = check_v2f(L, 2);
Noise *n = o->noise;
n->perlinMap2D(p.X, p.Y);
return 0;
}
int LuaPerlinNoiseMap::l_calc3dMap(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
LuaPerlinNoiseMap *o = checkobject(L, 1);
v3f p = check_v3f(L, 2);
if (!o->m_is3d)
return 0;
Noise *n = o->noise;
n->perlinMap3D(p.X, p.Y, p.Z);
return 0;
}
int LuaPerlinNoiseMap::l_getMapSlice(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
LuaPerlinNoiseMap *o = checkobject(L, 1);
v3s16 slice_offset = read_v3s16(L, 2);
v3s16 slice_size = read_v3s16(L, 3);
bool use_buffer = lua_istable(L, 4);
Noise *n = o->noise;
if (use_buffer)
lua_pushvalue(L, 3);
else
lua_newtable(L);
write_array_slice_float(L, lua_gettop(L), n->result,
v3u16(n->sx, n->sy, n->sz),
v3u16(slice_offset.X, slice_offset.Y, slice_offset.Z),
v3u16(slice_size.X, slice_size.Y, slice_size.Z));
return 1;
}
int LuaPerlinNoiseMap::create_object(lua_State *L)
{
NoiseParams np;
@ -339,8 +394,11 @@ const char LuaPerlinNoiseMap::className[] = "PerlinNoiseMap";
const luaL_reg LuaPerlinNoiseMap::methods[] = {
luamethod(LuaPerlinNoiseMap, get2dMap),
luamethod(LuaPerlinNoiseMap, get2dMap_flat),
luamethod(LuaPerlinNoiseMap, calc2dMap),
luamethod(LuaPerlinNoiseMap, get3dMap),
luamethod(LuaPerlinNoiseMap, get3dMap_flat),
luamethod(LuaPerlinNoiseMap, calc3dMap),
luamethod(LuaPerlinNoiseMap, getMapSlice),
{0,0}
};

4
src/script/lua_api/l_noise.h
View file

@ -74,6 +74,10 @@ class LuaPerlinNoiseMap : public ModApiBase {
static int l_get3dMap(lua_State *L);
static int l_get3dMap_flat(lua_State *L);
static int l_calc2dMap(lua_State *L);
static int l_calc3dMap(lua_State *L);
static int l_getMapSlice(lua_State *L);
public:
LuaPerlinNoiseMap(NoiseParams *np, int seed, v3s16 size);