Animation
VTKExamples/Cxx/Utilities/Animation
Description¶
This example demonstrates how to create a simple animation. A timer is used to move a sphere across a scene.
Code¶
Animation.cxx
#include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkCommand.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> class vtkTimerCallback2 : public vtkCommand { public: static vtkTimerCallback2 *New() { vtkTimerCallback2 *cb = new vtkTimerCallback2; cb->TimerCount = 0; return cb; } virtual void Execute(vtkObject *caller, unsigned long eventId, void * vtkNotUsed(callData)) { if (vtkCommand::TimerEvent == eventId) { ++this->TimerCount; } std::cout << this->TimerCount << std::endl; actor->SetPosition(this->TimerCount, this->TimerCount,0); vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::SafeDownCast(caller); iren->GetRenderWindow()->Render(); } private: int TimerCount; public: vtkActor* actor; }; int main(int, char* []) { // Create a sphere vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetCenter(0.0, 0.0, 0.0); sphereSource->SetRadius(5.0); sphereSource->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actor to the scene renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white // Render and interact renderWindow->Render(); // Initialize must be called prior to creating timer events. renderWindowInteractor->Initialize(); // Sign up to receive TimerEvent vtkSmartPointer<vtkTimerCallback2> cb = vtkSmartPointer<vtkTimerCallback2>::New(); cb->actor = actor; renderWindowInteractor->AddObserver(vtkCommand::TimerEvent, cb); int timerId = renderWindowInteractor->CreateRepeatingTimer(100); std::cout << "timerId: " << timerId << std::endl; // Start the interaction and timer renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(Animation) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(Animation MACOSX_BUNDLE Animation.cxx) target_link_libraries(Animation ${VTK_LIBRARIES})
Download and Build Animation¶
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 Animation and its CMakeLists.txt file. Once the tarball Animation.tar has been downloaded and extracted,
cd Animation/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:
./Animation
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.