surface_fractal_terrain::surface_fractal_terrain(double sidelen, int size, double hscale, double h, int seed) {
rand_generator.seed(seed);
if ((size & (size - 1)) != 0) {
throw_exception("size should be the power of 2.");
}
std::vector<std::vector<double> > height;
generate_heightmap(height, size, hscale, h);
generate_mesh(height, size, sidelen);
}
RSTag* create_chunk(int x, int z, uint8_t* zero_height)
{
uint8_t* blocks = rs_malloc0(0x8000);
uint8_t* blocklight = rs_malloc0(0x4000);
uint8_t* skylight = rs_malloc0(0x4000);
uint8_t* data = rs_malloc0(0x4000);
uint8_t* heightmap = rs_malloc0(0x100);
generate_terrain(x, z, blocks);
generate_heightmap(blocks, heightmap);
generate_skylight(blocks, heightmap, skylight);
if (zero_height)
*zero_height = heightmap[0];
RSTag* level = rs_tag_new(RS_TAG_COMPOUND,
"xPos", rs_tag_new(RS_TAG_INT, x),
"zPos", rs_tag_new(RS_TAG_INT, z),
"Blocks", rs_tag_new(RS_TAG_BYTE_ARRAY, 0x8000, blocks),
"BlockLight", rs_tag_new(RS_TAG_BYTE_ARRAY, 0x4000, blocklight),
"SkyLight", rs_tag_new(RS_TAG_BYTE_ARRAY, 0x4000, skylight),
"Data", rs_tag_new(RS_TAG_BYTE_ARRAY, 0x4000, data),
"HeightMap", rs_tag_new(RS_TAG_BYTE_ARRAY, 0x100, heightmap),
"Entities", rs_tag_new(RS_TAG_LIST, NULL),
"TileEntities", rs_tag_new(RS_TAG_LIST, NULL),
"TerrainPopulated", rs_tag_new(RS_TAG_BYTE, 1),
"LastUpdate", rs_tag_new(RS_TAG_LONG, 0),
NULL);
rs_free(blocks);
rs_free(blocklight);
rs_free(skylight);
rs_free(data);
rs_free(heightmap);
return rs_tag_new(RS_TAG_COMPOUND, "Level", level, NULL);
}