private TilemapChunk GetOrCreateTileChunk(int gridX, int gridY, bool createIfDoesntExist = false)
{
if (m_dicChunkCache.Count == 0 && transform.childCount > 0)
{
BuildTilechunkDictionary();
}
int chunkX = (gridX < 0 ? (gridX + 1 - k_chunkSize) : gridX) / k_chunkSize;
int chunkY = (gridY < 0 ? (gridY + 1 - k_chunkSize) : gridY) / k_chunkSize;
TilemapChunk tilemapChunk = null;
uint key = (uint)((chunkY << 16) | (chunkX & 0x0000FFFF));
m_dicChunkCache.TryGetValue(key, out tilemapChunk);
if (tilemapChunk == null && createIfDoesntExist)
{
string chunkName = chunkX + "_" + chunkY;
GameObject chunkObj = new GameObject(chunkName);
if (IsUndoEnabled)
{
#if UNITY_EDITOR
Undo.RegisterCreatedObjectUndo(chunkObj, k_UndoOpName + name);
#endif
}
tilemapChunk = chunkObj.AddComponent <TilemapChunk>(); //NOTE: this call TilemapChunk.OnEnable before initializing the TilemapChunk. Make all changes after this.
chunkObj.transform.parent = transform;
chunkObj.transform.localPosition = new Vector2(chunkX * k_chunkSize * CellSize.x, chunkY * k_chunkSize * CellSize.y);
chunkObj.transform.localRotation = Quaternion.identity;
chunkObj.transform.localScale = Vector3.one;
chunkObj.hideFlags = gameObject.hideFlags | HideFlags.HideInHierarchy; //NOTE: note the flags inheritance. BrushBehaviour object is not saved, so chunks are left orphans unless this inheritance is done
// Reset is not called after AddComponent while in play
if (Application.isPlaying)
{
tilemapChunk.Reset();
}
tilemapChunk.ParentTilemap = this;
tilemapChunk.GridPosX = chunkX * k_chunkSize;
tilemapChunk.GridPosY = chunkY * k_chunkSize;
tilemapChunk.SetDimensions(k_chunkSize, k_chunkSize);
tilemapChunk.SetSharedMaterial(Material);
tilemapChunk.SortingLayerID = m_sortingLayer;
tilemapChunk.OrderInLayer = m_orderInLayer;
tilemapChunk.UpdateRenderProperties();
m_dicChunkCache[key] = tilemapChunk;
}
return(tilemapChunk);
}