public abstract bool canDraw(WireMesh3D obj);
 public override bool canDraw(WireMesh3D obj) // siatkowy
 {
     return(obj.GetLineWidth() <= 1.0);
 }
 public override bool canDraw(WireMesh3D obj) // siatkowy
 {
     return(obj.GetColorspace() == Colorspace.RGB || obj.GetColorspace() == Colorspace.Default);
 }