private void UpdateProjectedPoints( )
{
Accord.Point[] projectedPoints = worldRendererControl.ProjectedPoints;
screenPoint1Box.Text = projectedPoints[0].ToString( );
screenPoint2Box.Text = projectedPoints[1].ToString( );
screenPoint3Box.Text = projectedPoints[2].ToString( );
screenPoint4Box.Text = projectedPoints[3].ToString( );
}