HideActor
VTKExamples/Cxx/Visualization/HideActor
Description¶
Display two spheres, then hide one, then hide both.
Question
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Code¶
HideActor.cxx
#include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyData.h> #include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkPropCollection.h> #include <vtkInteractorStyleTrackballCamera.h> #include <vtkInteractorStyleTrackball.h> int main (int, char *[]) { // Sphere 1 vtkSmartPointer<vtkSphereSource> sphereSource1 = vtkSmartPointer<vtkSphereSource>::New(); sphereSource1->SetCenter(0.0, 0.0, 0.0); sphereSource1->SetRadius(4.0); sphereSource1->Update(); vtkSmartPointer<vtkPolyDataMapper> mapper1 = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper1->SetInputConnection(sphereSource1->GetOutputPort()); vtkSmartPointer<vtkActor> actor1 = vtkSmartPointer<vtkActor>::New(); actor1->SetMapper(mapper1); // Sphere 2 vtkSmartPointer<vtkSphereSource> sphereSource2 = vtkSmartPointer<vtkSphereSource>::New(); sphereSource2->SetCenter(10.0, 0.0, 0.0); sphereSource2->SetRadius(3.0); sphereSource2->Update(); // Create a mapper vtkSmartPointer<vtkPolyDataMapper> mapper2 = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper2->SetInputConnection(sphereSource2->GetOutputPort()); // Create an actor vtkSmartPointer<vtkActor> actor2 = vtkSmartPointer<vtkActor>::New(); actor2->SetMapper(mapper2); // A renderer and render window vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); // An interactor vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actors to the scene renderer->AddActor(actor1); renderer->AddActor(actor2); renderer->SetBackground(1,1,1); // Background color white // Render an image (lights and cameras are created automatically) renderWindow->Render(); vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New(); //like paraview renderWindowInteractor->SetInteractorStyle( style ); renderWindowInteractor->Start(); // Set the background to red so we know we are done with the original two sphere display renderer->SetBackground(1,0,0); // Hide one actor at a time vtkPropCollection* props = renderer->GetViewProps(); //iterate through and set each visibility to 0 props->InitTraversal(); for(int i = 0; i < props->GetNumberOfItems(); i++) { props->GetNextProp()->VisibilityOff(); renderer->ResetCamera(); renderWindow->Render(); renderWindowInteractor->Start(); } return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(HideActor) find_package(VTK COMPONENTS vtkCommonCore vtkCommonDataModel vtkFiltersSources vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping HideActor: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION: ${VTK_VERSION}") if (VTK_VERSION VERSION_LESS "8.90.0") # old system include(${VTK_USE_FILE}) add_executable(HideActor MACOSX_BUNDLE HideActor.cxx ) target_link_libraries(HideActor PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(HideActor MACOSX_BUNDLE HideActor.cxx ) target_link_libraries(HideActor PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS HideActor MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build HideActor¶
Click here to download HideActor and its CMakeLists.txt file. Once the tarball HideActor.tar has been downloaded and extracted,
cd HideActor/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:
./HideActor
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.