public PreviewGenerator()
 {
     BackColor  = Color.White;
     SceneColor = Color.FromArgb(129, 129, 129);
     ViewAngle  = ePreview.Front;
     Scale      = 0.2f;
 }
 public PreviewGenerator()
 {
     BackColor = Color.White;
     SceneColor = Color.FromArgb(129,129,129);
     ViewAngle = ePreview.Front;
     Scale = 0.2f;
 }