[vtkusers] VTK6.0 label size problem of vtkScalarBarActor

[Bill Lorensen]

Also, do not read a file no one can read. You are better off creating an
image in the code.
See for example:
http://itk.org/Wiki/VTK/Examples/Cxx/Images/ImageRFFT
or
http://itk.org/Wiki/VTK/Examples/Cxx/Images/ImageShiftScale



On Tue, Jun 25, 2013 at 4:09 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> 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>
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://vtk.1045678.n5.nabble.com/VTK6-0-label-size-problem-of-vtkScalarBarActor-tp5721585p5721597.html
>> Sent from the VTK - Users mailing list archive at Nabble.com.
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>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com
>



-- 
Unpaid intern in BillsBasement at noware dot com
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