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
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.