Pathfinding.QuadtreeGraph.QueryPoint C# (CSharp) Method

		public QuadtreeNode QueryPoint (int qx, int qy) {
			if (root == null) return null;
			QuadtreeNodeHolder c = root;
			int depth = 0;
			int x = 0;
			int y = 0;
			while (c.node == null) {
				int width = 1 << (System.Math.Min (editorHeightLog2,editorWidthLog2)-depth);
				if (qx >= x + width/2) {
					x = x + width/2;
					if (qy >= y + width/2) {
						y = y + width/2;
						c = c.c2;
					} else {
						c = c.c1;
					}
				} else {
					if (qy >= y + width/2) {
						y = y + width/2;
						c = c.c3;
					} else {
						c = c.c0;
					}
				}
				depth ++;
			}
			return c.node;
		}