void destroy_chunk(world_data* world, int x, int y) {
int index = chunk_index(world, x, y);
if (!chunk_at(world, index)) {
return;
}
world->chunks.erase(index);
}
void create_chunk(world_chunk* chunk, int x, int y) {
chunk->index = { x, y };
size_t total_tiles = TILES_PER_ROW * TILES_PER_COL;
chunk->tiles.reserve(total_tiles);
for (size_t i = 0; i < total_tiles; i++) {
chunk->tiles.push_back(world_tile());
chunk->tiles[i].chunk_index = chunk_index(current_world(), x, y);
chunk->tiles[i].index = (uint16) i;
}
chunk->transform.scale.xy = { 1.0f, 1.0f };
chunk->transform.position.xy = chunk_position({ x, y });
}
element& operator() (chunk_index i, uint8_t dir)
{
chunk_index p (0,0,0);
switch (dir)
{
case 0: p = chunk_index( i.y, i.z, i.x); break;
case 1: p = chunk_index( 15 - i.y, i.z, 15 - i.x); break;
case 2: p = chunk_index( 15 - i.x, i.z, i.y); break;
case 3: p = chunk_index( i.x, i.z, 15 - i.y); break;
case 4: p = chunk_index( i.x, i.y, i.z); break;
case 5: p = chunk_index( i.x, 15 - i.y, 15 - i.z); break;
default: assert(false);
}
return dirs[dir][p.z][map_index(p)];
}
world_chunk* chunk_at(world_data* world, int x, int y) {
if (world->chunks.find(chunk_index(world, x, y)) == world->chunks.end()) {
return nullptr;
}
return &world->chunks[chunk_index(world, x, y)];
}
void initialize_chunk(world_data* world, int x, int y) {
int index = chunk_index(world, x, y);
world->chunks.emplace(index, world_chunk());
create_chunk(&world->chunks[index], x, y);
}