[vtkusers] VTK6.0 label size problem of vtkScalarBarActor

[Bill Lorensen]

Sorry. It won't compile without the include's. If you provide a cut/past
compilable example, folks will help quicker.



On Tue, Jun 25, 2013 at 3:56 PM, chasank <chasank at gmail.com> wrote:

> It's not small enough but it will illustrate the problem;
>
> int main(int argc, char **argv)
> {
>     vtkSmartPointer< vtkImageData > imageData = vtkSmartPointer <
> vtkImageData > :: New();
>
>     itk::Image< signed short, 3 > ImageType3D;
>
>     try
>     {
>         itk::ImageFileReader< ImageType3D >::Pointer reader =
> itk::ImageFileReader< ImageType3D >::New();
>         itk::NiftiImageIO::Pointer niftiIO = itk::NiftiImageIO::New();
>         reader->SetFileName("C:\\niftis\\ch2better.nii.gz");
>         reader->SetImageIO(niftiIO);
>         reader->UpdateLargestPossibleRegion();
>         reader->Update();
>
>         itk::ImageToVTKImageFilter< ImageType3D >::Pointer connector =
> itk::ImageToVTKImageFilter< ImageType3D >::New();
>         connector->SetInput(reader->GetOutput());
>         connector->Update();
>
>         imageData->DeepCopy(connector->GetOutput());
>
>     }
>     catch ( itk::ExceptionObject & excp )
>     {
>         std::cerr << excp << std::endl;
>     }
>
>     vtkSmartPointer< vtkLookupTable > table = vtkSmartPointer<
> vtkLookupTable >::New();
>     table->SetNumberOfTableValues(256);
>     table->SetTableRange(range[0], range[1]);
>     table->SetRampToLinear();
>     table->SetScaleToLinear();
>     table->GlobalWarningDisplayOff();
>     table->Build();
>
>     LookupTableReader *lutReader = new
> LookupTableReader("..\\luts\\grayscale");
>     unsigned char *r = lutReader->GetRed();
>     unsigned char *g = lutReader->GetGreen();
>     unsigned char *b = lutReader->GetBlue();
>
>     for (int i = 0; i <= 255; i++)
>     {
>         if ( i < 5 )
>         {
>             table->SetTableValue(i, *(r + i)/255.0, *(g + i)/255.0, *(b +
> i)/255.0, 0.0);
>         }
>         else if ( i > 250)
>         {
>             table->SetTableValue(i, *(r + i)/255.0, *(g + i)/255.0, *(b +
> i)/255.0, 1.0);
>         }
>         else
>         {
>             table->SetTableValue(i, *(r + i)/255.0, *(g + i)/255.0, *(b +
> i)/255.0, i/255.0);
>         }
>     }
>
>     vtkSmartPointer< vtkScalarBarActor > colorBar = vtkSmartPointer<
> vtkScalarBarActor >::New();
>     colorBar->SetMaximumNumberOfColors(256);
>     colorBar->SetLookupTable(table);
>     colorBar->SetHeight(0.12);
>     colorBar->SetWidth(0.90);
>     colorBar->SetPosition(0.04, 0.02);
>     colorBar->SetPosition2(0.90, 0.20);
>     colorBar->SetOrientationToHorizontal();
>     colorBar->SetNumberOfLabels(3);
>     colorBar->SetLabelFormat("%.4g");
>     colorBar->VisibilityOn();
>
>     vtkSmartPointer< vtkRenderer > renderer = vtkSmartPointer< vtkRenderer
> >::New();
>     vtkSmartPointer< vtkRenderWindow > renderWindow = vtkSmartPointer<
> vtkRenderWindow >::New();
>     vtkSmartPointer< vtkRenderWindowInteractor > iren = vtkSmartPointer<
> vtkRenderWindowInteractor >::New();
>     vtkSmartPointer< vtkInteractorStyleImage > interactorStyle =
> vtkSmartPointer< vtkInteractorStyleImage >::New();
>
>     double xViewRightVector[3] = {0, 1, 0};
>     double xViewUpVector[3] = {0, 0, 1};
>
>     double yViewRightVector[3] = {1, 0, 0};
>     double yViewUpVector[3] = {0, 0, 1};
>
>     double zViewRightVector[3] = { 1, 0, 0 };
>     double ZViewUpVector[3] = {0, 1, 0};
>
>     vtkSmartPointer< CallBack > callBack = vtkSmartPointer< CallBack
> >::New();
>
>     interactorStyle->AddObserver(vtkCommand::MouseWheelForwardEvent,
> callBack);
>     interactorStyle->AddObserver(vtkCommand::MouseWheelBackwardEvent,
> callBack);
>     interactorStyle->AddObserver(vtkCommand::StartWindowLevelEvent,
> callBack);
>     interactorStyle->AddObserver(vtkCommand::WindowLevelEvent, callBack);
>     interactorStyle->AddObserver(vtkCommand::ResetWindowLevelEvent,
> callBack);
>     interactorStyle->SetInteractionModeToImage3D();
>     interactorStyle->SetXViewRightVector(xViewRightVector);
>     interactorStyle->SetXViewUpVector(xViewUpVector);
>     interactorStyle->SetYViewRightVector(yViewRightVector);
>     interactorStyle->SetYViewUpVector(yViewUpVector);
>     interactorStyle->SetZViewRightVector(zViewRightVector);
>     interactorStyle->SetZViewUpVector(ZViewUpVector);
>     interactorStyle->SetImageOrientation(xViewRightVector, xViewUpVector);
>
>     renderWindow->AddRenderer(renderer);
>     iren->SetInteractorStyle(interactorStyle);
>     iren->SetRenderWindow(renderWindow);
>
>     vtkSmartPointer< vtkImageResliceMapper > mapper = vtkSmartPointer<
> vtkImageResliceMapper >::New();
>     mapper->SetInputDataObject(imageData);
>     mapper->SliceFacesCameraOn();
>     mapper->SliceAtFocalPointOn();
>     mapper->SetImageSampleFactor(2);
>     mapper->BorderOn();
>
>     double level = 0.5 * (range[0] + range[1]);
>     double window = range[1] - range[0];
>
>     vtkSmartPointer< vtkImageProperty > property = vtkSmartPointer<
> vtkImageProperty >::New();
>     property->SetColorLevel(level);
>     property->SetColorWindow(window);
>     property->SetInterpolationTypeToLinear();
>     property->SetLookupTable(table);
>     property->SetAmbient(1.0);
>     property->SetDiffuse(1.0);
>     property->SetOpacity(1.0);
>
>     double *center = imageData->GetCenter();
>
>     vtkSmartPointer< vtkMatrix4x4 > matrix = vtkSmartPointer< vtkMatrix4x4
> >::New();
>     matrix->Identity();
>     matrix->SetElement(0, 3, center[0]);
>     matrix->SetElement(1, 3, center[1]);
>     matrix->SetElement(2, 3, center[2]);
>     matrix->Modified();
>
>     vtkSmartPointer< vtkImageSlice > slice = vtkSmartPointer< vtkImageSlice
> >::New();
>     slice->SetMapper(mapper);
>     slice->SetProperty(property);
>     slice->SetUserMatrix(matrix);
>
>     renderer->AddViewProp(slice);
>     renderer->AddActor2D(colorBar);
>
>     vtkSmartPointer< vtkCamera > camera = renderer->GetActiveCamera();
>     camera->ParallelProjectionOn();
>     camera->SetFocalPoint(0.0, 0.0, 0.0);
>     camera->SetPosition(1.0, 0.0, 0.0);
>     camera->SetViewUp(0.0, 0.0, 1.0);
>
>     renderer->ResetCamera();
>
>     iren->Initialize();
>     iren->Start();
>     renderWindow->Render();
>
>     return 0;
> }
>
> Sample output is below;
> <http://vtk.1045678.n5.nabble.com/file/n5721597/colorBar_problem.png>
>
>
>
>
> --
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> Sent from the VTK - Users mailing list archive at Nabble.com.
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-- 
Unpaid intern in BillsBasement at noware dot com
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