MoveCamera
VTKExamples/Cxx/Visualization/MoveCamera
Description
This example creates two spheres. They will move together when the mouse is used to interact with the scene because the camera is actually what is moving causing the view of the spheres to change.
Code
MoveCamera.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 <vtkInteractorStyleTrackballCamera.h>
int main (int, char *[])
{
// Sphere 1
vtkSmartPointer<vtkSphereSource> sphereSource1 =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource1->SetCenter(0.0, 0.0, 0.0);
sphereSource1->SetRadius(4.0);
sphereSource1->Update();
vtkSmartPointer<vtkPolyDataMapper> mapper1 =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper1->SetInputConnection(sphereSource1->GetOutputPort());
vtkSmartPointer<vtkActor> actor1 =
vtkSmartPointer<vtkActor>::New();
actor1->SetMapper(mapper1);
// Sphere 2
vtkSmartPointer<vtkSphereSource> sphereSource2 =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource2->SetCenter(10.0, 0.0, 0.0);
sphereSource2->SetRadius(3.0);
sphereSource2->Update();
// Create a mapper
vtkSmartPointer<vtkPolyDataMapper> mapper2 =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper2->SetInputConnection(sphereSource2->GetOutputPort());
// Create an actor
vtkSmartPointer<vtkActor> actor2 =
vtkSmartPointer<vtkActor>::New();
actor2->SetMapper(mapper2);
// 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(actor1);
renderer->AddActor(actor2);
renderer->SetBackground(1,1,1); // Background color white
// Render an image (lights and cameras are created automatically)
renderWindow->Render();
vtkSmartPointer<vtkInteractorStyleTrackballCamera> style =
vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
renderWindowInteractor->SetInteractorStyle( style );
// Begin mouse interaction
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(MoveCamera)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(MoveCamera MACOSX_BUNDLE MoveCamera.cxx)
target_link_libraries(MoveCamera ${VTK_LIBRARIES})
Download and Build MoveCamera
Click here to download MoveCamera and its CMakeLists.txt file. Once the tarball MoveCamera.tar has been downloaded and extracted,
cd MoveCamera/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:
./MoveCamera
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.