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
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.