VTK/Examples/Cxx/Utilities/DataAnimationSubclass

From KitwarePublic
< VTK‎ | Examples‎ | Cxx
Jump to navigationJump to search
VTK Examples Baseline Utilities TestDataAnimationSubclass.png

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;
}

Please try the new VTKExamples website.

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)

if(VTK_LIBRARIES)
  target_link_libraries(DataAnimationSubclass ${VTK_LIBRARIES})
else()
  target_link_libraries(DataAnimationSubclass vtkHybrid vtkWidgets)
endif()

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.