Opacity
VTKExamples/Cxx/Visualization/Opacity
Code¶
Opacity.cxx
#include <vtkSmartPointer.h> #include <vtkCubeSource.h> #include <vtkSphereSource.h> #include <vtkPolyDataMapper.h> #include <vtkProperty.h> #include <vtkActor.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> int main(int, char *[]) { // Cube vtkSmartPointer<vtkCubeSource> cubeSource = vtkSmartPointer<vtkCubeSource>::New(); vtkSmartPointer<vtkPolyDataMapper> cubeMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); cubeMapper->SetInputConnection(cubeSource->GetOutputPort()); vtkSmartPointer<vtkActor> cubeActor = vtkSmartPointer<vtkActor>::New(); cubeActor->GetProperty()->SetOpacity(0.5); cubeActor->SetMapper(cubeMapper); // Sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); vtkSmartPointer<vtkPolyDataMapper> sphereMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); sphereMapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> sphereActor = vtkSmartPointer<vtkActor>::New(); sphereActor->GetProperty()->SetColor(0.5,1,0.5); sphereActor->GetProperty()->SetOpacity(0.5); sphereActor->SetMapper(sphereMapper); // Create renderers and add actors of plane and cube vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); renderer->AddActor(cubeActor); renderer->AddActor(sphereActor); // Add renderer to renderwindow and render vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); interactor->SetRenderWindow(renderWindow); renderer->SetBackground(0,0,0); renderWindow->Render(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(Opacity) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(Opacity MACOSX_BUNDLE Opacity.cxx) target_link_libraries(Opacity ${VTK_LIBRARIES})
Download and Build Opacity¶
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 Some tarballs may be missing or out-of-date.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 Opacity and its CMakeLists.txt file. Once the tarball Opacity.tar has been downloaded and extracted,
cd Opacity/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:
./Opacity
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.