[ITK-dev] Different 3D view for reading

[Marco Dev]

Hi dears,
why we have different 3D view from reading .mhd file or reading dicom files
through FixedPointVolumeRayCastMapperCT


for example :
dicom reader -->  vtkDICOMImageReader *dicomReader = vtkDICOMImageReader::
New();

    dicomReader->SetDirectoryName(dirname);

    dicomReader->Update();

    input=dicomReader->GetOutput();

    reader=dicomReader;


.

.

..

      colorFun->AddRGBPoint( -3024, 0, 0, 0, 0.5, 0.0 );

      colorFun->AddRGBPoint( -1000, .62, .36, .18, 0.5, 0.0 );

      colorFun->AddRGBPoint( -500, .88, .60, .29, 0.33, 0.45 );

      colorFun->AddRGBPoint( 3071, .83, .66, 1, 0.5, 0.0 );


      opacityFun->AddPoint(-3024, 0, 0.5, 0.0 );

      opacityFun->AddPoint(-1000, 0, 0.5, 0.0 );

      opacityFun->AddPoint(-500, 1.0, 0.33, 0.45 );

      opacityFun->AddPoint(3071, 1.0, 0.5, 0.0);


      mapper->SetBlendModeToComposite();

      property->ShadeOn();

      property->SetAmbient(0.1);

      property->SetDiffuse(0.9);

      property->SetSpecular(0.2);

      property->SetSpecularPower(10.0);

      property->SetScalarOpacityUnitDistance(0.8919);



===========================================================


mhd reader -- >

    vtkMetaImageReader *metaReader = vtkMetaImageReader::New();

    metaReader->SetFileName(fileName);

    metaReader->Update();

    input=metaReader->GetOutput();

    reader=metaReader;

.

.

.

.

.


    colorFun->AddRGBPoint( -3024, 0, 0, 0, 0.5, 0.0 );

      colorFun->AddRGBPoint( -1000, .62, .36, .18, 0.5, 0.0 );

      colorFun->AddRGBPoint( -500, .88, .60, .29, 0.33, 0.45 );

      colorFun->AddRGBPoint( 3071, .83, .66, 1, 0.5, 0.0 );


      opacityFun->AddPoint(-3024, 0, 0.5, 0.0 );

      opacityFun->AddPoint(-1000, 0, 0.5, 0.0 );

      opacityFun->AddPoint(-500, 1.0, 0.33, 0.45 );

      opacityFun->AddPoint(3071, 1.0, 0.5, 0.0);


      mapper->SetBlendModeToComposite();

      property->ShadeOn();

      property->SetAmbient(0.1);

      property->SetDiffuse(0.9);

      property->SetSpecular(0.2);

      property->SetSpecularPower(10.0);

      property->SetScalarOpacityUnitDistance(0.8919);
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