private QuadTreeNode CreateAndSetNode(SubNodeIndex subNodeIndex)
{
var x = this.Position.X;
var y = this.Position.Y;
var subSize = (ushort)(this.Size / 2);
var subSizePowerOfTwo = (byte)(this.sizePowerOfTwo - 1);
switch (subNodeIndex)
{
case SubNodeIndex.BottomLeft:
return(this.subNodeBottomLeft = new QuadTreeNode(new Vector2Int(x, y), subSizePowerOfTwo));
case SubNodeIndex.BottomRight:
return(this.subNodeBottomRight = new QuadTreeNode(new Vector2Int(x + subSize, y), subSizePowerOfTwo));
case SubNodeIndex.TopLeft:
return(this.subNodeTopLeft = new QuadTreeNode(new Vector2Int(x, y + subSize), subSizePowerOfTwo));
case SubNodeIndex.TopRight:
return(this.subNodeTopRight = new QuadTreeNode(new Vector2Int(x + subSize, y + subSize), subSizePowerOfTwo));
default:
throw new ArgumentOutOfRangeException(nameof(subNodeIndex), subNodeIndex, null);
}
}
public QuadTreeNode GetSubNode(SubNodeIndex subNodeIndex)
{
switch (subNodeIndex)
{
case SubNodeIndex.BottomLeft:
return(this.subNodeBottomLeft);
case SubNodeIndex.BottomRight:
return(this.subNodeBottomRight);
case SubNodeIndex.TopLeft:
return(this.subNodeTopLeft);
case SubNodeIndex.TopRight:
return(this.subNodeTopRight);
default:
throw new ArgumentOutOfRangeException(nameof(subNodeIndex), subNodeIndex, null);
}
}
private void DestroySubNode(SubNodeIndex subNodeIndex)
{
switch (subNodeIndex)
{
case SubNodeIndex.BottomLeft:
this.subNodeBottomLeft = null;
break;
case SubNodeIndex.BottomRight:
this.subNodeBottomRight = null;
break;
case SubNodeIndex.TopLeft:
this.subNodeTopLeft = null;
break;
case SubNodeIndex.TopRight:
this.subNodeTopRight = null;
break;
default:
throw new ArgumentOutOfRangeException(nameof(subNodeIndex), subNodeIndex, null);
}
}
