[vtkusers] vtkImageAppend lost color

[Tracy Hu]

I added a colored image to vtkImageAppend, which produced an image without color.
The color array in its output also contains different values from that in original image:(100, 0, 0)(0,0,0)(100,0,0)(0,0,0)

Do you know what I did wrong? thank you very much. below is my code:

int main( int argc, char *argv[] )
{
    vtkUnsignedCharArray *colorArray = vtkUnsignedCharArray::New();
        colorArray->SetNumberOfComponents(3);    
        colorArray->InsertTuple3(0,100.0,0.0,0.0);    
        colorArray->InsertTuple3(1,100.0,0.0,0.0);    
        colorArray->InsertTuple3(2,100.0,0.0,0.0);    
        colorArray->InsertTuple3(3,100.0,0.0,0.0);

    vtkImageData *image = vtkImageData::New();
        image->SetDimensions(2,2,1);
        image->SetSpacing(1.0,1.0,1.0);
        image->SetOrigin(0.0,0.0,0.0);
        image->SetScalarType(VTK_UNSIGNED_CHAR);
        image->GetPointData()->SetScalars(colorArray);
    
    vtkImageAppend *reader = vtkImageAppend::New();
        reader->AddInput(image);

    vtkDataSetMapper *mapper = vtkDataSetMapper::New();
        mapper->SetInput(reader->GetOutput());
        
    vtkActor *actor = vtkActor::New();
        actor->SetMapper(mapper);    

    vtkRenderer* ren = vtkRenderer::New();
        ren->AddActor(actor);
        ren->SetBackground(1, 1, 1);

    vtkRenderWindow* renWin = vtkRenderWindow::New();
        renWin->AddRenderer(ren);

    vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
        iren->SetRenderWindow(renWin);
    vtkInteractorStyleTrackballCamera *style = vtkInteractorStyleTrackballCamera::New();
        iren->SetInteractorStyle(style);
    renWin->SetSize(600,600);
    renWin->Render();
    iren->Start();

    style->Delete();
    iren->Delete();
    ren->Delete();
    renWin->Delete();
    actor->Delete();
    mapper->Delete();
    reader->Delete();
    return 0;

}



       
---------------------------------
Looking for last minute shopping deals?  Find them fast with Yahoo! Search.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20080103/f4766b45/attachment.htm>