Cast
VTKExamples/Cxx/Images/Cast
Description¶
Cast an image to a different type.
Code¶
Cast.cxx
#include <vtkImageData.h> #include <vtkSmartPointer.h> #include <vtkImageCast.h> #include <vtkImageMapper3D.h> #include <vtkImageActor.h> #include <vtkImageMandelbrotSource.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkInteractorStyleImage.h> int main(int, char *[]) { // Create a float image vtkSmartPointer<vtkImageMandelbrotSource> source = vtkSmartPointer<vtkImageMandelbrotSource>::New(); source->Update(); std::cout << source->GetOutput()->GetScalarTypeAsString() << std::endl; vtkSmartPointer<vtkImageCast> castFilter = vtkSmartPointer<vtkImageCast>::New(); castFilter->SetInputConnection(source->GetOutputPort()); castFilter->SetOutputScalarTypeToUnsignedChar(); castFilter->Update(); // Create an actor vtkSmartPointer<vtkImageActor> actor = vtkSmartPointer<vtkImageActor>::New(); actor->GetMapper()->SetInputConnection(castFilter->GetOutputPort()); // Setup renderer vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddActor(actor); renderer->ResetCamera(); // Setup render window vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); // 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(Cast) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(Cast MACOSX_BUNDLE Cast.cxx) target_link_libraries(Cast ${VTK_LIBRARIES})
Download and Build Cast¶
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 Some tarballs may be missing or out-of-date.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 Cast and its CMakeLists.txt file. Once the tarball Cast.tar has been downloaded and extracted,
cd Cast/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:
./Cast
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.