# Groups of cells in unstructured grid

**URL:** https://discourse.paraview.org/t/groups-of-cells-in-unstructured-grid/7919
**Category:** Development
**Created:** [September 2, 2021, 12:37pm UTC](https://discourse.paraview.org/t/groups-of-cells-in-unstructured-grid/7919 "2021-09-02T12:37:56Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Sagues](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/a88e4f/32.png) [@Sagues](https://discourse.paraview.org/u/Sagues)
#### Post date: [September 2, 2021, 12:37pm UTC](https://discourse.paraview.org/t/groups-of-cells-in-unstructured-grid/7919/1 "2021-09-02T12:37:56Z")

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If I have this unstructured grid like this:

vtkNew ugrid;  
ugrid-\>Allocate(100);  
ugrid-\>InsertNextCell(VTK\_HEXAHEDRON, 8, pts[0]);  
ugrid-\>InsertNextCell(VTK\_HEXAHEDRON, 8, pts[1]);  
ugrid-\>InsertNextCell(VTK\_TETRA, 4, pts[2]);  
ugrid-\>InsertNextCell(VTK\_TETRA, 4, pts[3]);  
ugrid-\>InsertNextCell(VTK\_POLYGON, 6, pts[4]);  
ugrid-\>InsertNextCell(VTK\_TRIANGLE\_STRIP, 6, pts[5]);  
ugrid-\>InsertNextCell(VTK\_QUAD, 4, pts[6]);  
ugrid-\>InsertNextCell(VTK\_TRIANGLE, 3, pts[7]);  
ugrid-\>InsertNextCell(VTK\_TRIANGLE, 3, pts[8]);  
ugrid-\>InsertNextCell(VTK\_LINE, 2, pts[9]);  
ugrid-\>InsertNextCell(VTK\_LINE, 2, pts[10]);  
ugrid-\>InsertNextCell(VTK\_VERTEX, 1, pts[11]);

How can I create groups (f.e. Triangles, Lines, Quadrilaterals) and then identify these groups in paraview.

Thanks

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<div class="post-metadata">

### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [September 2, 2021, 1:40pm UTC](https://discourse.paraview.org/t/groups-of-cells-in-unstructured-grid/7919/2 "2021-09-02T13:40:04Z")

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See my answer here: [Unstructured grid with different type of elements (triangle and lines) - #5 by Sagues](https://discourse.paraview.org/t/unstructured-grid-with-different-type-of-elements-triangle-and-lines/7918/5)