[vtkusers] 3D array to vtkImageData

[ylongwu]

hi,evryone, 
   I want to use vtkImageData read a raw datasets 26*180*280, and I followed
an example from the internet.  and i have made some changes.But it show a
26*180 image,and the color of the image is all red. Could anyone help me?
thanks. 
  
code: 


void vtkImageShow(float *3DArray, int*dims, int*shrinkFactor) 
{ 
    
    int i,j,k; 
    float *rawData = new float[26*180*280]; 

     for (i = 0; i < dims[0]; i++) 
        { 
          for (j = 0; j < dims[1]; j++) 
        { 
           for (k = 0; k < dims[2]; k++) 
             { 
                  
rawData[i*dims[1]*dims[2]+j*dims[2]+k]=3DArray[i*dims[1]*dims[2]+j*dims[2]+k]; 
             } 
              } 
          } 
        //Volume Rendeing 
        vtkImageData* id = vtkImageData::New() ; 

        id->SetDimensions(dims[0], dims[1], dims[2]); 
        id->SetScalarTypeToFloat(); 
        id->SetNumberOfScalarComponents(3); 
        id->AllocateScalars(); 
        vtkImageShrink3D *mask = vtkImageShrink3D::New(); 
        mask->SetInput(id); 
        //mask->SetShrinkFactors(shrinkFactor[0], shrinkFactor[1],
shrinkFactor[2]); 

        float* a = (float*)(id->GetScalarPointer()); 

        for (i = 0; i < dims[0]; i++) 
        { 
                for (j = 0; j < dims[1]; j++) 
                { 
                        for (k = 0; k < dims[2]; k++) 
                        { 
                                *a++ =
rawData[i*dims[1]*dims[2]+j*dims[2]+k]; 

                        } 
                } 
        } 

        vtkContourFilter *cf = vtkContourFilter::New(); 
        cf->SetInputConnection(mask->GetOutputPort()); 

        vtkPolyDataMapper *mapper = vtkPolyDataMapper::New(); 
        mapper->SetInputConnection(cf->GetOutputPort()); 
        mapper->SetScalarRange(0, 5000000); 

        vtkActor *actor = vtkActor::New(); 
        actor->SetMapper(mapper); 

        vtkCamera *aCamera =  vtkCamera::New(); 
        aCamera->SetViewUp(0, 5, 0); 
        aCamera->SetPosition(5, 0, 0); 
        aCamera->SetFocalPoint(0, 0, 0); 
        aCamera->ComputeViewPlaneNormal(); 

        vtkRenderer *ren = vtkRenderer::New(); 
        ren->AddActor(actor); 
        ren->ResetCamera(); 
        //aCamera->Dolly(1.5); 
        ren->ResetCameraClippingRange(); 
        vtkRenderWindow *renWin = vtkRenderWindow::New(); 
        renWin->AddRenderer(ren); 
        ren->SetBackground(0.0f, 0.0f, 0.0f); 

        vtkRenderWindowInteractor* iren = vtkRenderWindowInteractor::New(); 
        iren->SetRenderWindow(renWin); 
        iren->Initialize(); 
        iren->Start(); 

} 
http://vtk.1045678.n5.nabble.com/file/n5554141/QQ%E6%88%AA%E5%9B%BE20120309100328.jpg 
http://vtk.1045678.n5.nabble.com/file/n5554141/QQ%E6%88%AA%E5%9B%BE20120309100400.jpg 

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