[vtkusers] How to construct volume from series of bitmaps

[Suganthi]

Hi,

I am trying to construct a 3d volume from a series of bitmaps (ct- slices)
using the below code, but
the code crashes at " w->Render();"

Whether the following code flow is correct?

what should be the input for vtkVolumeRayCastMapper?

what are the parameters for SetDataExtent method? if you give the parameter
description, it would be helpful.


Please help me......

#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 "vtkProperty.h"
#include "vtkPolyDataNormals.h"
#include "vtkContourFilter.h"
#include "vtkBMPReader.h"
#include "vtkImageData.h"
#include "vtkImageActor.H"
#include "vtkVolumeMapper.h"
#include "vtkVolumeRayCastMapper.h"
#include "vtkDataSetMapper.H"

void main()
{

        vtkRenderWindow *w=vtkRenderWindow::New();
        vtkBMPReader *r=vtkBMPReader::New();
		vtkVolumeRayCastMapper *vtm = vtkVolumeRayCastMapper::New();
		vtkRenderer *ren=vtkRenderer::New();
       // vtkImageActor *a=vtkImageActor::New();
		vtkVolume *a = vtkVolume::New();
		vtkRenderWindowInteractor *i=vtkRenderWindowInteractor::New();
		//vtkVolume16Reader *v=vtkVolume16Reader::New();
       //vtkDataSetMapper *m=vtkDataSetMapper::New();
        i->SetRenderWindow(w);
        r->SetFileDimensionality(2);
        r->SetDataByteOrderToLittleEndian();
            r->SetFilePrefix("new/Slice");
            r->SetFilePattern("%s%d.bmp");
            r->SetDataSpacing(3.0,2.0,3.0);
			//r->SetDataExtent(0, 63, 0, 63,0,2); // 2 slices
			r->SetDataExtent(0, 255, 0, 255,0,2); // 2 slices
           	vtm->SetInput(r->GetOutput());
			a->SetMapper(vtm);
		    w->AddRenderer(ren);
            ren->AddActor(a);
            w->Render();
            i->Start();
}

regards
SoftUsers


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