[vtkusers] Fw: What's wrong with the code?

[cly]

Hi, Lorenson,
Thank you very much! it works now.

Best Regards,

Changli, Yao

----- Original Message ----- 
From: "Lorensen, William E (CRD)" <lorensen at crd.ge.com>
To: "'cly'" <clyao at cugb.edu.cn>; <vtkusers at public.kitware.com>
Sent: Friday, March 29, 2002 8:30 PM
Subject: RE: [vtkusers] Fw: What's wrong with the code?


> I'm guessing you are running on an Intel processor.
>  
> Try changing
> v16->SwapBytesOn();
> to
> v16->SetDataByteOrderToLittleEndian();
>  
> This will make the reader decide whether or not to swap the bytes.
>  
> Bill
> 
> -----Original Message-----
> From: cly [mailto:clyao at cugb.edu.cn]
> Sent: Friday, March 29, 2002 4:53 AM
> To: vtkusers at public.kitware.com
> Subject: [vtkusers] Fw: What's wrong with the code?
> 
> 
>  
> ----- Original Message ----- 
> From: cly <mailto:clyao at cugb.edu.cn>  
> To: vtkusers at public.kitware.com <mailto:vtkusers at public.kitware.com>  
> Sent: Friday, March 29, 2002 5:50 PM
> Subject: What's wrong with the code?
> 
> 
> Hi,
> 
> The following codes was the exact example in the vtk book(1998), but I got different results, which I
> think it were wrong, and have attatched as a series pictures. (I failed twice as a whole picture for
> its size.)
> I changed with many values of isosurfaces, tried to find a smooth 'real' skin of the head, but failed
> at last.
> 
> Someone can help.
> Many thanks in advance,
> 
> Changli, Yao
> 
> 
> /* the program in the book ia as these:*/
> 
> file://include <file://include>  class definitions
> #include "vtkRenderer.h"
> #include "vtkRenderWindow.h"
> #include "vtkRenderWindowInteractor.h"
> #include "vtkVolume16Reader.h"
> #include "vtkPolyDataMapper.h"
> #include "vtkActor.h"
> #include "vtkOutlineFilter.h"
> #include "vtkCamera.h"
> #include "../patented/vtkMarchingCubes.h"
> void main(void)
> {
> file://create <file://create>  the renderer stuff
>  vtkRenderer *aRenderer = vtkRenderer::New();
>  vtkRenderWindow *renWin = vtkRenderWindow::New();
>  renWin->AddRenderer(aRenderer);
>  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
>  iren->SetRenderWindow(renWin);
>   file://read <file://read>  the volume
>  vtkVolume16Reader *v16 = vtkVolume16Reader::New();
>  v16->SetDataDimensions(64,64);
>  v16->SwapBytesOn();
>  v16->SetFilePrefix("headsq/quarter");
>  v16->SetImageRange(1, 93);
>  v16->SetDataSpacing(3.2,3.2,1.5);
>   file://extract <file://extract>  the skin
>  vtkMarchingCubes *skinExtractor = vtkMarchingCubes::New();
>  skinExtractor->SetInput(v16->GetOutput());
>  skinExtractor->SetValue(0, 500);//or (0, 5000),(0, 10000),(0, 40000),(0, 50000),(0,60000)
>  vtkPolyDataMapper* skinMapper = vtkPolyDataMapper::New();
>  skinMapper->SetInput(skinExtractor->GetOutput());
>  skinMapper->ScalarVisibilityOff();
>  vtkActor *skin = vtkActor::New();
>  skin->SetMapper(skinMapper);
>   file://get <file://get>  an outline
>  vtkOutlineFilter *outLineData = vtkOutlineFilter::New();
>  outLineData->SetInput(v16->GetOutput());
>  vtkPolyDataMapper* mapOutline = vtkPolyDataMapper::New();
>  mapOutline->SetInput(outLineData->GetOutput());
>  vtkActor *outline = vtkActor::New();
>  outline->SetMapper(mapOutline);
>  outline->GetProperty()->SetColor(0,0,0);
>   file://create <file://create>  a camera with the correct view up
>  vtkCamera * aCamera = vtkCamera::New();
>  aCamera->SetViewUp(0,0,-1);
>  aCamera->SetPosition(0,1,0);
>  aCamera->SetFocalPoint(0,0,0);
>  aCamera->ComputeViewPlaneNormal();
>   file://tell <file://tell>  the renderer our camera and actors
>  aRenderer->AddActor(outline);
>  aRenderer->AddActor(skin);
>  aRenderer->SetActiveCamera(aCamera);
>  aRenderer->ResetCamera();
>  aRenderer->SetBackground(1,1,1);
>   file://interact <file://interact>  with data
>  renWin->Render();
>  iren->Start();
> }
> 
> 
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