[vtkusers] Change color space without vtkColorTransferFunction()

[Hom Nath Gharti]

Thank you very much indeed!

Hom Nath

On Mon, Feb 2, 2009 at 11:36 AM, Amy Squillacote <ahs at cfdrc.com> wrote:

> SetLookupTable
>
> It's defined in vtkMapper, the superclass of vtkPolyDataMapper.
>
> - Amy
>
> Hom Nath Gharti wrote:
>
>> 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 <mailto:
>> 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
>>
>>
>>
>>
> --
> 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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