// continue with rendering
> I am trying to combine showing the outer surface of an MRI brain (iso
> surface) with 3 planes that define a cut inside the brain (say the upper
> back right part has been cut out.
> Defining the surface (with vtkMarchingCubes) was not a problem. the
> cutout (with vtkPlanes and vtkClipPolyData) went fine as well.
> Then I drew the cut planes with vtkCutter (using the same planes as I
> did for clipping). The cutplanes first extended to the edge of the
> bounding box, obscuring most of the brain surface. I (sort of) solved
> this by putting another vtkClipPolyData after the vtkCutter, which
> removes the part of the cut plane outside the brain.
> The cut after thresholding is very rough, though. Does anyone know
> whether it is possible to clip a vtkPolyData with *another* vtkPolyData?
> The (visually) best result would be to limit the cutplanes by the brain
> surface. I tried to use vtkClipPolyData, but this can only use a
> vtkImplicitFunction to clip, and not another vtkPolyData.
> Is there a way to compute the intersection of two vtkPolyData
> structures? Or to convert a vtkPolyData into a vtkImplicitFunction?
> Perhaps this can be done in another, very elegant way???
> Many thanks,
> Alle Meije Wink