Slice/Clip with a surface

Tips and Tricks
1

It is possible to slice and clip a volume with a surface by using a Phyton Programmable Filter.
This relies on the vtkImplicitPolyDataDistance, so the result is an approximation, not an actual boolean operation.

Steps for clip:

  • Open a volume, apply
  • Open a surface, apply
  • In the pipeline browser, click on the volume, then press Ctrl, then click on the surface
  • Add a Programmable Filter
  • Set the output type to vtkUnstructuredGrid
  • Set the script to
import paraview.modules.vtkPVVTKExtensionsFiltersGeneral as ext

inpMain = self.GetInputDataObject( 0, 0 )
inp = self.GetInputDataObject( 0, 1 )
out = self.GetOutput()

clipper = ext.vtkPVMetaClipDataSet()
clipper.SetInputDataObject(inpMain)
clipper.SetInsideOut(True)
function = vtk.vtkImplicitPolyDataDistance()
function.SetInput(inp)
clipper.SetDataSetClipFunction(function)
clipper.Update()

outData = clipper.GetOutputDataObject(0)
out.DeepCopy(outData)
  • Press Apply

Steps for slice:

  • Open a volume, apply
  • Open a surface, apply
  • In the pipeline browser, click on the volume, then press Ctrl, then click on the surface
  • Add a Programmable Filter
  • Set the output type to vtkPolyData
  • Set the script to
import paraview.modules.vtkPVVTKExtensionsFiltersGeneral as ext

inpMain = self.GetInputDataObject( 0, 0 )
inp = self.GetInputDataObject( 0, 1 )
out = self.GetOutput()

slicer = ext.vtkPVMetaSliceDataSet()
slicer.SetInputDataObject(inpMain)

function = vtk.vtkImplicitPolyDataDistance()
function.SetInput(inp)
slicer.SetDataSetCutFunction(function)
slicer.Update()

outData = slicer.GetOutputDataObject(0)
out.DeepCopy(outData)
  • Press Apply

image
image1920×1411 122 KB

There is an issue to add that in ParaView proper: https://gitlab.kitware.com/paraview/paraview/-/issues/18138

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