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
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.