Extract Cell types from mesh in Paraview

ctsol001@odu.edu (Christos Tsolakis) — Tue, 17 Apr 2018 00:00:00 +0000

It is often usefull to select cells by their type for visualization in Paraview. Visualizing boundary layer meshes for example or extracting the surface elements of a mesh can be done by using the following script in the Programmable filter of Paraview.

input = self.GetUnstructuredGridInput()
output = self.GetUnstructuredGridOutput();

# copy all curent data
output.GetPointData().PassData(input.GetPointData())
output.GetCellData().PassData(input.GetCellData())

# create an array holding the VTK cell type id of each element
cellTypes = vtk.vtkUnsignedCharArray()
cellTypes.DeepCopy(input.GetCellTypesArray())
cellTypes.SetName("Cell Types")
output.GetCellData().AddArray(cellTypes)

Even simpler you can import this file (export_cell_types.cpd) from the menu Tools>Manage Custom Filters… > Import.

Vtk on ctsolakis.com

Extract Cell types from mesh in Paraview