[vtkusers] how to attach multi-attributes to the same dataset?

[Alex Malyushytskyy]

I have no experience with python,
but normally y SetActiveScalars is a function you are looking for normally.
and it should be called for dataset.

For  regular dataset it would probably look like :
sgrid.GetPointData().SetActiveScalars("ScalarNameYouWantToMakeActive")

You will have to test it yourself with multiblock dataset yourself though


Regards,
      Alex



On Mon, Jul 16, 2012 at 1:53 AM, April.Q <qinjiameilf at 163.com> wrote:
> Thanks David E DeMarle, it works.
> Now i get many StructuredGrids , all of them has two attributes scalar_1 and
> scalar_2.
> Then i use these StructuredGrids build a vtkMultiBlockDataset.
> I want to render these vtkMultiBlockDataset and find one topic about it ,and
> see your advice .
> How to tell the filter to operate on a specific array(eg. only render a
> slice of scalar_2)??Tell which filter ??
>
> I use python ,and i do like this:
>
>      pipeline = vtk.vtkCompositeDataPipeline()
>      algorithm = vtk.vtkAlgorithm()
>      algorithm.SetDefaultExecutivePrototype(pipeline)
>
>      compositeFilter = vtk.vtkCompositeDataGeometryFilter()
>      compositeFilter.SetInput(MyMultiBlockDataset)
>      compositeFilter.Update()
>
>      colors = vtk.vtkImageMapToColors()
>      colors.SetInputConnection(compositeFilter.GetOutputPort())
>      colors.SetLookupTable(MyLookupTable)
>      colors.Update()
>
>      imageReslice = vtk.vtkImageReslice()
>      imageReslice.SetInput(colors.GetOutput())
>
>      sliceMapper = vtk.vtkImageMapper()
>      sliceMapper.SetInputConnection(imageReslice.GetOutputPort())
>
>      sliceActor = vtk.vtkActor()
>      sliceActor.SetMapper(sliceMapper)
> #ValueError: method requires a vtkMapper, a
> #  vtkOpenGLImageMapper was provided.
>
>      renderer...
>      renWin...
>      iren...
>       ... ...
>
> --
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