[vtkusers] color isosurface

[yi mu]

Hi Naim, thank you for your help, but the the example you give is for unstructured data and the data I have is unorganized point data. I am attaching my program and data file for you to review.  I have been stuck here for 2 days, I just couldn't map the color to scalar value. Your help are greatly appreciated!
 
 YM
Naim <naim at electromagneticworks.com> wrote: Hi YM,

I'm using this example:

 // clipping using input scalar data
 vtkClipDataSet* IsoClipper = vtkClipDataSet::New(); 
  IsoClipper->SetInput(m_pMyUnstructuredGrid);
  double value = myValue; // myValue ª [MinValue, MaxValue]
  IsoClipper->GenerateClipScalarsOff(); // OFF
  IsoClipper->SetValue(value);

 vtkDataSetMapper* myMapper = vtkDataSetMapper::New();
  myMapper->SetInputConnection(IsoClipper->GetOutputPort());

 vtkActor* myActor = vtkActor::New();
  myActor->SetMapper(myMapper);

 IsoMapper->SetScalarRange(MinValue, MaxValue);
 IsoMapper->SetLookupTable(myVtkLookupTable);
 IsoMapper->InterpolateScalarsBeforeMappingOn();

 myRenderer->AddViewProp(myActor);

You can use vtkClipPolyData if u are using point data.
 
If you want generate many iso use: vtkContourGrid or vtkContourFilter.

 vtkContourGrid *mycontourGrid = vtkContourGrid::New();
  mycontourGrid->SetInput(m_pMyUnstructuredGrid); ;
  mycontourGrid->GenerateValues(n, MinValue, MaxValue);


Naim Himrane
ElectromagneticWorks inc.



-----Original Message-----
From: vtkusers-bounces+naim=electromagneticworks.com at vtk.org
[mailto:vtkusers-bounces+naim=electromagneticworks.com at vtk.org] On Behalf Of
yi mu
Sent: September 12, 2006 9:41 PM
To: VTK
Subject: [vtkusers] color isosurface

Is there anyone has an example shows how to color an
isosurface generated from point data? I am desperated.
Any help will be appriciated!

YM

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