internal GeoRegionClip(Rectangle2D clipBox)
{
this.boundary = clipBox;
this.Edges = new Edge[]
{
new Edge { IsHorisontal = false, IsLeft = true, Value = this.boundary.Left },
new Edge { IsHorisontal = false, IsLeft = false, Value = this.boundary.Right },
new Edge { IsHorisontal = true, IsLeft = true, Value = this.boundary.Bottom },
new Edge { IsHorisontal = true, IsLeft = false, Value = this.boundary.Top }
};
}