[dub71ca]

Hello Andrej, 

Thank you so much for your help so far. I am finding my way around your excellent tool. I am using the following code to highlight objects on the MouseMove event. 

Code:

       private void HighlightObject(GeometryModel3D hitBoxModel3D)
       {
           Point3DCollection polyPositions = MeshUtils.GetPolygonPositions(hitBoxModel3D);

           _multiLineVisual3D = new MultiLineVisual3D
           {
               Positions = polyPositions,
               LineColor = Colors.Yellow,
               LineThickness = 5
           };

           wireFrame3D.Children.Add(_multiLineVisual3D);
       }

It works great until the object is one generated using the MeshBooleanOperations.Union

Code:

               var testCore3D = new Ab3d.Meshes.TubeMesh3D(new Point3D(xpos + 26, ypos, zpos), new Vector3D(1, 0, 0), 6, 0, 3, 0, 13, 30);
               var conetest1 = testCore3D.Geometry;

               testCore3D = new Ab3d.Meshes.TubeMesh3D(new Point3D(xpos + 36, ypos, zpos), new Vector3D(1, 0, 0), 3, 0, 6, 0, 7, 30);
               var conetest2 = testCore3D.Geometry;


               //Lets try union to make core a single object
               var someOtherCore = Ab3d.Utilities.MeshBooleanOperations.Union(conetest1, conetest2);
               var modeltest3D = new GeometryModel3D(someOtherCore, material);
               modeltest3D.BackMaterial = material;
               _model3DGroup.Children.Add(modeltest3D);

Before I used Union to join the 2, the individual TubeMesh objects were outlined with their yellow wire frame. Once I used Union to create a single object MeshUtils.GetPolygonPositions(hitBoxModel3D) now returns null. Is this expected? Am I doing something wrong? Can I make it work?

Regards,
Darren