replying to oneself is kind of creepy, but perhaps it will benefit someone:<br>
<br>
the problem, if I understand correctly, lays in the fact that vtkObjectFactory is used to create a vtkActor instance.<br>
vtkObjectFactory can override any class with a subclass of that class and that's exactly what it does in the case<br>
of instantiating vtkActor. either vtkMesaActor or vtkOpenGLActor gets created. when we subclass vtkActor into<br>
class myActor : public vtkActor .. myActor is NOT a superclass of either OpenGL or Mesa varieties of vtkActors,<br>
and thus the object eludes rendering.<br>
<br>
the solution is to instead subclass vtkOpenGLActor or vtkMesaActor.<br clear="all"><br>-- <br><a href="mailto:stoptv@gmail.com">stoptv@gmail.com</a><br>
<br>