Yes. Or one can convert the 3D objects to step/iges and use OpenCascade to show/manipulate/extract info from/etc them. This is actually how I used to handle the problem but now the (potential) customer sent me some 3D - DWG files. On the other hand, Teigha looks interesting! Again, thank you! Regards, Radu G.

I took your suggestion and I used TeighaFileConverter 4.3.2 to export the given DWG file to DXF (ascii R12 and R13). The DXF R12 format worked like a charm, the other one (R13) ... not so much ... The good news is I decided to buy the libraries (CADLIB Pro) as they suit our needs. So far ;-) Thank you for your support! Regards, Radu G.

Is it possible to show the resulting DXF R12 3D object as wireframe (as well) in OpenGLExtendedViewExampleCS ? Is there smth. i'm overlooking? Regards, Radu G.

There's a renderMode field that you can set to RenderMode.Wireframe, but you might as well use Win Forms if you do wireframe rendering. - Wout

Thank you! I tried the WinForm approach but it showed me only a 2D view (projection?) and, besides that, I need both views (solid and wireframe ... you know customer's requirement ;-))! Regards, Radu G.

Sure, whatever works for you. But the win forms view you can also rotate in 3D through Matrix4D, but if you need both solid rendering then OpenGL is probably easier. - Wout

I tried your suggestion RenderMode.Wireframe but the result is quite different from what i had in mind (No Surface Triangulation). Is this possible?

I don't understand, why would you need surface triangulation in wireframe rendering? - Wout

I don't! Have a look at the second image! PS I hope i didn't express myself wrongly!

Oh, you have surface triangulation, but you don't want it, I understood the other way around. Could you send the DXF/DWG file for me to have a look at? - Wout