private void BuildTileMapChunkCacheDict()
{
tileMapChunk_cache_dict.Clear();
for (int i = 0; i < transform.childCount; ++i)
{
TileMapChunk tileMapChunk = transform.GetChild(i).GetComponent <TileMapChunk>();
if (tileMapChunk)
{
Vector2Int chunk_xy = tileMapChunk.GetChunkXY();
uint key = GetTileMapChunkKey(chunk_xy);
tileMapChunk_cache_dict[key] = tileMapChunk;
}
}
}
