TrackballActor
VTKExamples/Cxx/Interaction/TrackballActor
Description¶
This example shows how to visualize data in "trackball" mode. That is, click and drag actors is the way to interact.
Contrast this with TrackballCamera.
Code¶
TrackballActor.cxx
#include <vtkSmartPointer.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyData.h> #include <vtkSphereSource.h> #include <vtkConeSource.h> #include <vtkInteractorStyleTrackballActor.h> int main (int, char *[]) { // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(1.0, 0.0, 0.0); sphereSource->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> sphereMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); sphereMapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> sphereActor = vtkSmartPointer<vtkActor>::New(); sphereActor->SetMapper(sphereMapper); // Create a cone vtkSmartPointer<vtkConeSource> coneSource = vtkSmartPointer<vtkConeSource>::New(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> coneMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); coneMapper->SetInputConnection(coneSource->GetOutputPort()); vtkSmartPointer<vtkActor> coneActor = vtkSmartPointer<vtkActor>::New(); coneActor->SetMapper(coneMapper); // 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(sphereActor); renderer->AddActor(coneActor); renderer->SetBackground(.1, .2, .3); // Background color dark blue // Render renderWindow->SetWindowName("Trackball Actor"); renderWindow->Render(); vtkSmartPointer<vtkInteractorStyleTrackballActor> style = vtkSmartPointer<vtkInteractorStyleTrackballActor>::New(); renderWindowInteractor->SetInteractorStyle( style ); // Begin mouse interaction renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(TrackballActor) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(TrackballActor MACOSX_BUNDLE TrackballActor.cxx) target_link_libraries(TrackballActor ${VTK_LIBRARIES})
Download and Build TrackballActor¶
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 TrackballActor and its CMakeLists.txt file. Once the tarball TrackballActor.tar has been downloaded and extracted,
cd TrackballActor/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:
./TrackballActor
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.