DataAnimation
VTKExamples/Cxx/Utilities/DataAnimation
Description¶
This causes one point of the sphere to be moved outwards at each iteration.
Question
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Code¶
DataAnimation.cxx
#include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkProgrammableFilter.h> #include <vtkCallbackCommand.h> void TimerCallbackFunction ( vtkObject* caller, long unsigned int eventId, void* clientData, void* callData ); // Globals unsigned int counter2 = 0; void AdjustPoints2(void* arguments) { std::cout << "AdjustPoints2" << 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] + counter2 * 0.1; newPts->SetPoint(0, p0); programmableFilter->GetPolyDataOutput()->CopyStructure(programmableFilter->GetPolyDataInput()); programmableFilter->GetPolyDataOutput()->SetPoints(newPts); } 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(AdjustPoints2, 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<vtkCallbackCommand> timerCallback = vtkSmartPointer<vtkCallbackCommand>::New(); timerCallback->SetCallback ( TimerCallbackFunction ); timerCallback->SetClientData(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; } void TimerCallbackFunction ( vtkObject* caller, long unsigned int vtkNotUsed(eventId), void* clientData, void* vtkNotUsed(callData) ) { cout << "timer callback" << endl; vtkSmartPointer<vtkProgrammableFilter> programmableFilter = static_cast<vtkProgrammableFilter*>(clientData); vtkRenderWindowInteractor *iren = static_cast<vtkRenderWindowInteractor*>(caller); programmableFilter->Modified(); iren->Render(); counter2++; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(DataAnimation) find_package(VTK COMPONENTS vtkCommonCore vtkFiltersProgrammable vtkFiltersSources vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping DataAnimation: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION: ${VTK_VERSION}") if (VTK_VERSION VERSION_LESS "8.90.0") # old system include(${VTK_USE_FILE}) add_executable(DataAnimation MACOSX_BUNDLE DataAnimation.cxx ) target_link_libraries(DataAnimation PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(DataAnimation MACOSX_BUNDLE DataAnimation.cxx ) target_link_libraries(DataAnimation PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS DataAnimation MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build DataAnimation¶
Click here to download DataAnimation and its CMakeLists.txt file. Once the tarball DataAnimation.tar has been downloaded and extracted,
cd DataAnimation/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:
./DataAnimation
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.