CompassWidget
VTKExamples/Cxx/Geovis/CompassWidget
Description¶
This example creates a compass in the top right corner of the window.
Code¶
CompassWidget.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 <vtkCompassWidget.h> #include <vtkCompassRepresentation.h> #include <vtkInteractorStyleTrackballCamera.h> #include <vtkInteractorStyleTrackball.h> int main (int, char *[]) { //sphere 1 vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(0.0, 0.0, 0.0); sphereSource->SetRadius(4.0); vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // 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); // Create the widget and its representation vtkSmartPointer<vtkCompassRepresentation> compassRepresentation = vtkSmartPointer<vtkCompassRepresentation>::New(); vtkSmartPointer<vtkCompassWidget> compassWidget = vtkSmartPointer<vtkCompassWidget>::New(); compassWidget->SetInteractor(renderWindowInteractor); compassWidget->SetRepresentation(compassRepresentation); // add the actors to the scene renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white renderWindow->Render(); compassWidget->EnabledOn(); vtkSmartPointer<vtkInteractorStyleTrackballCamera> style = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New(); renderWindowInteractor->SetInteractorStyle( style ); // begin interaction renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(CompassWidget) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(CompassWidget MACOSX_BUNDLE CompassWidget.cxx) target_link_libraries(CompassWidget ${VTK_LIBRARIES})
Download and Build CompassWidget¶
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 CompassWidget and its CMakeLists.txt file. Once the tarball CompassWidget.tar has been downloaded and extracted,
cd CompassWidget/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:
./CompassWidget
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.