ParaView/Python/Programmable Filters

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Convert float colors to unsigned char colors

The Transform filter converts any colors to floats, which Paraview cannot handle. To convert them back, you can use this: 

inp = self.GetInput()
out = self.GetOutput()
 
numCells  = inp.GetNumberOfCells()
data = inp.GetCellData().GetArray("Colors")
 
newData = vtk.vtkUnsignedCharArray()
newData.SetName('Colors_converted')
newData.SetNumberOfComponents(3)
for i in range(0, 3*numCells):
 val = int(data.GetValue(i))
 newData.InsertNextValue(val)
out.GetCellData().AddArray(newData)


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