DataAnimationSubclass
VTKExamples/Cxx/Utilities/DataAnimationSubclass
Code
DataAnimationSubclass.cxx
#include <vtkSmartPointer.h>
#include <vtkObjectFactory.h>
#include <vtkSphereSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkProgrammableFilter.h>
#include <vtkCommand.h>
class CommandSubclass : public vtkCommand
{
public:
vtkTypeMacro(CommandSubclass, vtkCommand);
static CommandSubclass *New()
{
return new CommandSubclass;
}
void Execute(vtkObject *caller, unsigned long vtkNotUsed(eventId),
void *vtkNotUsed(callData))
{
std::cout << "timer callback" << std::endl;
vtkRenderWindowInteractor *iren =
static_cast<vtkRenderWindowInteractor*>(caller);
this->ProgrammableFilter->Modified();
iren->Render();
}
vtkSmartPointer<vtkProgrammableFilter> ProgrammableFilter;
};
unsigned int counter; //global
void AdjustPoints(void* arguments)
{
std::cout << "AdjustPoints" << std::endl;
vtkProgrammableFilter* programmableFilter =
static_cast<vtkProgrammableFilter*>(arguments);
vtkPoints* inPts = programmableFilter->GetPolyDataInput()->GetPoints();
vtkIdType numPts = inPts->GetNumberOfPoints();
vtkSmartPointer<vtkPoints> newPts =
vtkSmartPointer<vtkPoints>::New();
newPts->SetNumberOfPoints(numPts);
for(vtkIdType i = 0; i < numPts; i++)
{
double p[3];
inPts->GetPoint(i, p);
newPts->SetPoint(i, p);
}
double p0[3];
inPts->GetPoint(0, p0);
p0[2] = p0[2] + counter * 0.1;
newPts->SetPoint(0, p0);
programmableFilter->GetPolyDataOutput()->CopyStructure(programmableFilter->GetPolyDataInput());
programmableFilter->GetPolyDataOutput()->SetPoints(newPts);
counter++;
}
int main(int, char *[])
{
// Create a sphere
vtkSmartPointer<vtkSphereSource> sphereSource =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource->Update();
vtkSmartPointer<vtkProgrammableFilter> programmableFilter =
vtkSmartPointer<vtkProgrammableFilter>::New();
programmableFilter->SetInputConnection(sphereSource->GetOutputPort());
programmableFilter->SetExecuteMethod(AdjustPoints, programmableFilter);
// Create a mapper and actor
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(programmableFilter->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);
// Initialize must be called prior to creating timer events.
renderWindowInteractor->Initialize();
renderWindowInteractor->CreateRepeatingTimer(500);
vtkSmartPointer<CommandSubclass> timerCallback =
vtkSmartPointer<CommandSubclass>::New();
timerCallback->ProgrammableFilter = programmableFilter;
renderWindowInteractor->AddObserver ( vtkCommand::TimerEvent, timerCallback );
// Add the actor to the scene
renderer->AddActor(actor);
renderer->SetBackground(1,1,1); // Background color white
// Render and interact
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(DataAnimationSubclass)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(DataAnimationSubclass MACOSX_BUNDLE DataAnimationSubclass.cxx)
target_link_libraries(DataAnimationSubclass ${VTK_LIBRARIES})
Download and Build DataAnimationSubclass
Click here to download DataAnimationSubclass and its CMakeLists.txt file. Once the tarball DataAnimationSubclass.tar has been downloaded and extracted,
cd DataAnimationSubclass/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:
./DataAnimationSubclass
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.