[vtkusers] Change color space without vtkColorTransferFunction()

[Hom Nath Gharti]

Many thanks for the help.

Unfortunately I could not figure out the appropriate member of
vtkPolyDataMapper() to define the vtkColorTransferFunction(). Would you
point me further?

Thanks

On Mon, Feb 2, 2009 at 11:06 AM, Amy Squillacote <ahs at cfdrc.com> wrote:

> You don't set the vtkColorTransferFunction on a vtkProperty; you set it on
> a vtkMapper (or vtkPolyDataMapper, in your case). vtkActor's SetProperty
> method takes a vtkProperty, so that isn't the problem.
>
> - Amy
>
> Hom Nath Gharti wrote:
>
>> Thanks for the suggestion. I have the python code like this:
>>
>> import vtk
>>
>> # Create rendering window and renderer
>> ren = vtk.vtkRenderer()
>> renWin = vtk.vtkRenderWindow()
>> renWin.AddRenderer(ren)
>> renWin.SetSize(600, 600)
>>
>> # Interacting window
>> iren = vtk.vtkRenderWindowInteractor()
>> iren.SetRenderWindow(renWin)
>>
>> # Read VTK image data
>> reader = vtk.vtkXMLImageDataReader()
>> reader.SetFileName("py_3d_strike0_stack_XY.vti")
>>
>> plane=vtk.vtkImageDataGeometryFilter()
>> plane.SetInputConnection(reader.GetOutputPort())
>> plane.SetExtent(0, 60, 0, 60, 0, 0)
>> #srange = plane.GetOutput().GetPointData().GetScalars().GetRange()
>>
>> warp = vtk.vtkWarpScalar()
>> warp.SetInputConnection(plane.GetOutputPort())
>> warp.UseNormalOn
>> warp.SetNormal(0.0,0.0,1.0)
>> warp.SetScaleFactor(2.0)
>>
>> # Color map
>> color=vtk.vtkColorTransferFunction()
>> color.SetColorSpaceToDiverging()
>>
>> vprop=vtk.vtkProperty()
>> vprop.SetColor(color)
>>
>> mapper = vtk.vtkPolyDataMapper()
>> mapper.SetInputConnection(warp.GetOutputPort())
>>
>> actor = vtk.vtkActor()
>> actor.SetMapper(mapper)
>> actor.SetProperty(vprop)
>> actor.GetProperty().SetRepresentationToWireframe()
>> actor.SetPosition(0.0,0.0,200.0) #Translate
>>
>> # Add the actors to the renderer, set the background
>> ren.AddActor(actor)
>>
>> ren.ResetCamera()
>> ren.GetActiveCamera().Azimuth(0)
>> ren.GetActiveCamera().Elevation(-70)
>> ren.SetBackground(1.0, 1.0, 1.0)
>> ren.ResetCameraClippingRange()
>>
>> #iren.Initialize()
>> renWin.Render()
>> iren.Start()
>>
>>
>> Obviously I get the error in in ' actor.SetProperty(vprop) ' and I cannot
>> implement vtkVolumeProperty() here. Am I missing something?
>>
>> Any help/suggestions will greatly be appreciated.
>>
>> Thanks,
>> Hom Nath
>>
>>
> --
> Amy Squillacote                    Phone: (256) 726-4839
> Sr. Computer Scientist             Fax: (256) 726-4806
> CFD Research Corporation           Web: http://www.cfdrc.com
> 215 Wynn Drive, Suite 501
> Huntsville, AL  35805
>
>
>
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