[vtkusers] Fwd: create a 3d volume form a series BMP file

[liu]

hello everyone
i'm new VTKer  who can tell me create a 3d volume form a series BMP file.
Althought i have create one by follow code:


#include "vtkRenderer.h"
 #include "vtkRenderWindow.h"
 #include "vtkRenderWindowInteractor.h"
 #include "vtkBMPReader.h"
 #include "vtkPolyDataMapper.h"
 #include "vtkActor.h"
 #include "vtkActor2D.h"
 #include "vtkImageActor.h"
 #include "vtkOutlineFilter.h"
 #include "vtkCamera.h"
 #include "vtkProperty.h "
 #include "vtkPolyDataNormals.h"
 #include "vtkContourFilter.h"
 #include "vtkDataSetMapper.h"
 #include "vtkImageMapper.h"
 #include "vtkVolumeMapper.h"
 #include " vtkVolumeRayCastMapper.h"
 #include "vtkVolumeRayCastCompositeFunction.h"
 #include "vtkPiecewiseFunction.h"
 #include "vtkVolumeProperty.h"


 void main (void)
 {

  vtkRenderer *aRenderer = vtkRenderer::New();
     vtkRenderWindow *renWin = vtkRenderWindow::New();

  renWin->AddRenderer(aRenderer);
     vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
     iren->SetRenderWindow(renWin);


  //create an instance of the class vtkBMPReader
  vtkBMPReader *br = vtkBMPReader::New();

  br->SetFilePrefix("slice/");
  br->SetFilePattern("%simage%d.bmp");
  br->SetFileNameSliceOffset(1);
  br->SetFileNameSliceSpacing(1);
  br->SetNumberOfScalarComponents(3);
  br->SetDataSpacing(5.0,5.0,10);
  br->SetDataOrigin(0,0,0);
  br->SetDataExtent(0,255,0,255,0,63);
  br->Update();




  vtkFixedPointVolumeRayCastMapper *VolumeMapper =
vtkFixedPointVolumeRayCastMapper::New();

  VolumeMapper->SetInput(br->GetOutput());


  vtkVolume *volume = vtkVolume::New();

  VolumeMapper->SetInput(br->GetOutput());
  volume->SetMapper(VolumeMapper);

  vtkCamera *aCamera = vtkCamera::New();
  aCamera->SetViewUp (0, 0,-1);
  aCamera->SetPosition (0, 1, 0);
  aCamera->SetFocalPoint (0, 0, 0);
  aCamera->ComputeViewPlaneNormal();


  aRenderer->AddActor(volume);
  aRenderer->SetActiveCamera(aCamera);
  aRenderer->ResetCamera ();
  aRenderer->SetBackground(1,1,1);
  renWin->Render();

  iren->Initialize();
  iren->Start();

 }



but it only a cube that sunface with BMP.It not a real 3d like the data
treat by marching cube or other
algorithm.So i want get a real 3D .who can tell me what shoud i do .Perhaps
i should use some filter(but i don't know which should i use)

someone who can help me thank you.....
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