Write texture mapped obj file to disk with VTK

Question

I am using VTK to read an obj file, texture map the 3D model and transform it to another view (by applying rotateY/X/Z transforms to vtkActors) and writing it to file using vtkwindowtoImageFilter. Due to this pipeline, the rendered image is displayed on the screen before being written to file. Is there a way to do the same pipeline without the image being displayed on screen ?

Answer 1

If you are using VTK 5.10 or earlier, you can reander the geometry off screen.

I am not quite sure if this is what you are looking for. I am new to vtk and I found the above link looking for a way to convert a triangular surface to volume data, ie, to voxelize the surface. All profile I found on the internet is about using vtkwindowtoImageFilter to obtain a 2D section of the screen, have you worked out a way to access 3D data of the rendered window? Please tell me about that.