[Paraview] vtkOpenGLProjectedTetrahedraMapper on generic unstructured grid

[Moreland, Kenneth]

ParaView internally runs the vtkDataSetTriangleFilter filter to subdivide
all cells into tetrahedra.

-Ken



On 9/15/11 8:16 AM, "Peter Maday" <madapeti at gmail.com> wrote:

>Dear Paraview users,
>
>I have a .vtk dataset containing an unstructured grid with scalars.
>Paraview seems to be able to volume render the dataset (and it
>mentions vtkOpenGLProjectedTetrahedraMapper in the progress bar while
>doing the rendering). The dataset contains not only tetrahedra, but
>other cell types as well.
>
>I would like to do the same volume rendering using VTK only, however
>am experiencing some difficulties. The volume rendering mapper gives
>an error message stating that only tetrahedral elements are supported
>for the rendering. As long as Paraview really relies on
>vtkOpenGLProjectedTetrahedraMapper, there has to be a way to modify
>the original untructured grid so that the non terahedral cells are
>removed / transformed.
>
>My question is if anyone should have some suggestion about how to do
>this conversion, or by what means it should be possible to get the
>volume rendering working for this kind of dataset.
>
>Thanks a lot,
>Peter
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