[vtkusers] on-screen and off-screen lighting

[Nigel Nunn]

Hi, 
The vtkLightKit is doing a great job lighting the scene, 
(thanks Michael Halle!), but how do I get this lighting 
into offscreen-rendered images?  These images get poured 
into .avi movies as frames, generated from an MFC-based 
vtkWin32OpenGLRenderWindow.  Each frame of the movie is 
generated by: 
 
  SetupMemoryRendering(size[0],size[1], hdc); 
  vtkWin->Render(); 
  memcpy( ... ); 
  ResumeScreenRendering(); 
 
The problem is: if I don't add lights to the scene, the 
offscreen-rendered frames get the same adequate default 
lighting as the scene.  But once I add lights, or use 
the vtkLightKit, the movie frames lose their lighting. 
Can someone help me get the lights used in the scene 
into the offscreen "MemoryRendering"? 
 
thanks, 
Nigel 
 
 

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