ImageDivergence
VTKExamples/Cxx/Images/ImageDivergence
Code¶
ImageDivergence.cxx
#include <vtkSmartPointer.h> #include <vtkImageCast.h> #include <vtkImageData.h> #include <vtkImageMapper3D.h> #include <vtkImageCanvasSource2D.h> #include <vtkImageDivergence.h> #include <vtkImageGradient.h> #include <vtkImageCanvasSource2D.h> #include <vtkImageCorrelation.h> #include <vtkInteractorStyleImage.h> #include <vtkImageActor.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkImageMandelbrotSource.h> int main(int, char *[]) { // Create an image vtkSmartPointer<vtkImageMandelbrotSource> source = vtkSmartPointer<vtkImageMandelbrotSource>::New(); source->Update(); vtkSmartPointer<vtkImageCast> originalCastFilter = vtkSmartPointer<vtkImageCast>::New(); originalCastFilter->SetInputConnection(source->GetOutputPort()); originalCastFilter->SetOutputScalarTypeToFloat(); originalCastFilter->Update(); // Compute the gradient (to produce a vector field) vtkSmartPointer<vtkImageGradient> gradientFilter = vtkSmartPointer<vtkImageGradient>::New(); gradientFilter->SetInputConnection(source->GetOutputPort()); gradientFilter->Update(); vtkSmartPointer<vtkImageDivergence> divergenceFilter = vtkSmartPointer<vtkImageDivergence>::New(); divergenceFilter->SetInputConnection(gradientFilter->GetOutputPort()); divergenceFilter->Update(); vtkSmartPointer<vtkImageCast> divergenceCastFilter = vtkSmartPointer<vtkImageCast>::New(); divergenceCastFilter->SetInputConnection(divergenceFilter->GetOutputPort()); divergenceCastFilter->SetOutputScalarTypeToFloat(); divergenceCastFilter->Update(); // Create actors vtkSmartPointer<vtkImageActor> originalActor = vtkSmartPointer<vtkImageActor>::New(); originalActor->GetMapper()->SetInputConnection( originalCastFilter->GetOutputPort()); vtkSmartPointer<vtkImageActor> divergenceActor = vtkSmartPointer<vtkImageActor>::New(); divergenceActor->GetMapper()->SetInputConnection( divergenceCastFilter->GetOutputPort()); // Define viewport ranges // (xmin, ymin, xmax, ymax) double leftViewport[4] = {0.0, 0.0, 0.5, 1.0}; double rightViewport[4] = {0.5, 0.0, 1.0, 1.0}; // Setup renderers vtkSmartPointer<vtkRenderer> originalRenderer = vtkSmartPointer<vtkRenderer>::New(); originalRenderer->SetViewport(leftViewport); originalRenderer->AddActor(originalActor); originalRenderer->ResetCamera(); vtkSmartPointer<vtkRenderer> divergenceRenderer = vtkSmartPointer<vtkRenderer>::New(); divergenceRenderer->SetViewport(rightViewport); divergenceRenderer->AddActor(divergenceActor); divergenceRenderer->ResetCamera(); // Setup render window vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->SetSize(600,300); renderWindow->AddRenderer(originalRenderer); renderWindow->AddRenderer(divergenceRenderer); // Setup render window interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); vtkSmartPointer<vtkInteractorStyleImage> style = vtkSmartPointer<vtkInteractorStyleImage>::New(); renderWindowInteractor->SetInteractorStyle(style); // Render and start interaction renderWindowInteractor->SetRenderWindow(renderWindow); renderWindowInteractor->Initialize(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(ImageDivergence) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(ImageDivergence MACOSX_BUNDLE ImageDivergence.cxx) target_link_libraries(ImageDivergence ${VTK_LIBRARIES})
Download and Build ImageDivergence¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download ImageDivergence and its CMakeLists.txt file. Once the tarball ImageDivergence.tar has been downloaded and extracted,
cd ImageDivergence/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./ImageDivergence
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.