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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I am using Activiz and would like to derive a class from vtkInteractorStyleTrackballCamera. I am familiar with how to create a dericed class in C#, but it doesn’t appear to work with Activiz. For any member function that I’d like to override I using this syntax:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:blue'> public</span><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>override</span> <span style='color:blue'>void</span> Rotate()<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>if</span> (bRotate)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>base</span>.Rotate();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>else<o:p></o:p></span></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>base</span>.Spin();<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>In this example I would like to overide the Rotate function and add a switch to determine whetheror not to rotate or spin. I think this part of my code is correct. The problem that I’m having is the constructor. If I set up a default constructor and then call it in my main code with “new”, is the .New() method of the base class called? I don’t think that it is, but I can’t tell. How could I set up my constructor to call the base classes New() method? It seems I need some kind of macro, but I don’t think it is available in Activiz. If I use the following code in my main class (i.e. Form1) the Rotate() override method is never called.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>vStyle = <span style='color:blue'>new</span> <span style='color:#2B91AF'>myClass</span>();<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>vInteractor.SetInteractorStyle(vStyle);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>where vInteractor is an instance of vtkRenderWindowInteractor. Anyone have any ideas why this doesn’t work or how to make it work?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Sean</span><o:p></o:p></p></div></body></html>