public bool TestCellInMaze(Point p)
{
Rect r = new Rect(this.coords.X, this.coords.Y, this.coords.X + this.size.X, this.coords.Y + this.size.Y);
Rect cell = new Rect(p.X, p.Y, this.tunnelWidth, this.tunnelWidth);
return cell.insideOf(r);
}