How to convert a surface mesh to voxels?

Cam · February 2, 2022, 4:58am

Hi

I have a surface mesh file (.stl) and I was wondering if there exists a filter in Paraview to convert it to volumetric voxels and visualize it?

Thanks,
Yang

mwestphal · February 2, 2022, 8:38am

Could you give some details on the expected results ?

Cam · February 2, 2022, 4:43pm

I would like to convert a closed surface mesh (.stl) to vtkImageData or unstructuregrid to have volume rendering, i.e., the inside of surface mesh is rendered as voxels. I am currently looking into implicit model. What is the general approach to solve this problem?

Matheus_Viana · February 2, 2022, 7:06pm

This can be done in VTK with vtkPolyDataToImageStencil. Maybe in paraview you can use a programmable filter to implement vtkPolyDataToImageStencil?

mwestphal · February 3, 2022, 9:56am

What data do you expect inside the volume ? There will be none.

In any case, to get a vtkImageData use GaussianRessampling, to get a vtkUnstructuredGrid use Delaunay3D.