TrackballCamera
VTKExamples/Cxx/Interaction/TrackballCamera
Description¶
This example demonstrates the trackball camera mode. When the mouse is clicked and dragged from anywhere in the window, the camera is modified.
Contrast this with TrackballActor.
Code¶
TrackballCamera.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 <vtkInteractorStyleTrackballCamera.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 an image (lights and cameras are created automatically) renderWindow->SetWindowName("Trackball Camera"); renderWindow->Render(); vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New(); //like paraview renderWindowInteractor->SetInteractorStyle( style ); // Begin mouse interaction renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(TrackballCamera) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(TrackballCamera MACOSX_BUNDLE TrackballCamera.cxx) target_link_libraries(TrackballCamera ${VTK_LIBRARIES})
Download and Build TrackballCamera¶
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 TrackballCamera and its CMakeLists.txt file. Once the tarball TrackballCamera.tar has been downloaded and extracted,
cd TrackballCamera/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:
./TrackballCamera
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.