[vtkusers] Coloring of Iso-Surfaces (vtkContourFilter)

[Sebastien Jourdain]

I forgot to say that binding a LUT to a mapper might not be enough, you have
to set the Scalar range to the mapper as well.
But at least, the LUT is properly set.

scalarIsoSurfaceMapper->SetScalarRange(
sGridPointData->GetOutput()->GetScalarRange()
);

Hope I did not forget something else... ;-)

Seb


On Mon, Mar 15, 2010 at 9:06 AM, Sebastian Gatzka <
sebastian.gatzka at stud.tu-darmstadt.de> wrote:

>  Unfortunately not. All iso surfaces are still colored the same, when
> using the lookup table from the cutting plane.
>
>
> Am 15.03.2010 13:58, schrieb Sebastien Jourdain:
>
> You have to do something like that
>
>  scalarIsoSurfaceMapper->SetLookupTable( cuttingPlaneLUT );
>
>  Therefore the mapper will color both outputs with the same color manner.
>
>  Seb
>
> On Mon, Mar 15, 2010 at 8:44 AM, Sebastian Gatzka <
> sebastian.gatzka at stud.tu-darmstadt.de> wrote:
>
>>  I have a lookuptable I use for a cutting plane, which is set up and
>> displaying correctly.
>> Concerning the contour filter I did nothing with lookup tables. Just the
>> code below.
>> Do I have to use one?
>>
>> Am 15.03.2010 13:38, schrieb Sebastien Jourdain:
>>
>> Are you using the same lookuptable for all the outputs ? Did you set the
>> range properly to that lookuptable and mapper ?
>>
>> On Mon, Mar 15, 2010 at 7:14 AM, Sebastian Gatzka <
>> sebastian.gatzka at stud.tu-darmstadt.de> wrote:
>>
>>>  No, still blue ...
>>>
>>> Am 15.03.2010 11:41, schrieb David E DeMarle:
>>>
>>> scalarIsoSurface->ComputeScalarsOn();
>>>
>>> On Mon, Mar 15, 2010 at 4:55 AM, Sebastian Gatzka<sebastian.gatzka at stud.tu-darmstadt.de> <sebastian.gatzka at stud.tu-darmstadt.de> wrote:
>>>
>>>
>>>  Hello world.
>>>
>>> After I have finally found a way of making the vtkContourFilter work I'm now
>>> facing how to color them.
>>> I want to color them according to the value they are having.
>>> Example: The cutting plane displays the "right" color for the scalar data,
>>> but the iso-surfaces (contours) are colored identically.
>>> Have a look at the screenshot in the attachment.
>>>
>>> So, what do I have to do, to set up the right coloring?
>>>
>>> Here is the code I am using to create the contours:
>>>
>>> vtkContourFilter *scalarIsoSurface = vtkContourFilter::New();
>>> scalarIsoSurface->SetInput(sGridPointData->GetOutput());
>>> scalarIsoSurface->SetValue(0,3);
>>> scalarIsoSurface->SetValue(1,5);
>>> scalarIsoSurface->Update();
>>>
>>> vtkPolyDataNormals *sGridPolyDataNormal = vtkPolyDataNormals::New();
>>> sGridPolyDataNormal->SetInput(scalarIsoSurface->GetOutput());
>>> sGridPolyDataNormal->Update();
>>>
>>> vtkPolyDataMapper *scalarIsoSurfaceMapper = vtkPolyDataMapper::New();
>>> scalarIsoSurfaceMapper->SetInput(sGridPolyDataNormal->GetOutput());
>>> scalarIsoSurfaceMapper->Update();
>>>
>>> vtkActor *scalarIsoSurfaceActor = vtkActor::New();
>>> scalarIsoSurfaceActor->SetMapper(scalarIsoSurfaceMapper);
>>>
>>> Have a nice day.
>>> Sebastian
>>>
>>>
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>>
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>> Visit other Kitware open-source projects at
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>>
>
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>
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