public DoubleRect(DoublePoint pt, DoubleSize size)
{
this.x = pt.X;
this.y = pt.Y;
this.width = size.Width;
this.height = size.Height;
}
public bool Contains(DoublePoint pt)
{
// TODO verify this
return (pt.X >= this.X &&
pt.X <= this.X + this.width &&
pt.Y >= this.Y &&
pt.Y <= this.Y + this.height);
}