[vtkusers] Changing colors?

[Bill Lorensen]

By default, actors that have scalars associated with their PointData use the scalars to color the data. To turn off this "feature",

vhdContMapper ScalarVisibilityOff

At 02:41 PM 9/18/02 -0400, Jeremy Winston wrote:
>VTKnowers,
>    I was hoping to change the scalar values associated
>with the points in the vtkPolyData output by vtkMarchingSquares, 
>and to have those changed values affect the color of the actor
>associated with that data.
>    I'm doing something wrong.  No matter how I fiddle with the
>scalars, the actor always appears the same shade of blue.
>
>Here is a code snippet:
>
>  vtkMarchingSquares vhdContour
>    [...]
>  vtkPolyDataMapper2D vhdContMapper
>    vhdContMapper SetInput [vhdContour GetOutput]
>  vtkActor2D vhdContActor
>    vhdContActor SetMapper vhdContMapper
>
>  vtkRenderer ren1
>  vtkRenderWindow renWin
>    renWin AddRenderer ren1
>
>  ren1 AddActor2D vhdContActor
>
>And I have been trying to get/set the scalars thusly:
>
>  [[vhdContour GetOutput] GetPointData] GetComponent 0 0
>
>  [[vhdContour GetOutput] GetPointData] SetComponent 0 0 12
>
>Though the scalar values are being changed, the color remains the same.
>Any hints will be greatly appreciated.
>
>Thanks,
>-Jeremy
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