# CameraBlur

VTKExamples/Cxx/Rendering/CameraBlur

### Code

CameraBlur.cxx

    #include <vtkRenderer.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkSphereSource.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkActor.h>
    #include <vtkCamera.h>
    #include <vtkConeSource.h>
    #include <vtkGlyph3D.h>

    int main( int, char *[] )
    {
      // create the rendering objects
      vtkRenderer *ren1 = vtkRenderer::New();
      vtkRenderWindow *renWin = vtkRenderWindow::New();
        renWin->AddRenderer(ren1);
      vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
        iren->SetRenderWindow(renWin);

      // create the pipline, ball and spikes
      vtkSphereSource *sphere = vtkSphereSource::New();
        sphere->SetPhiResolution(7); sphere->SetThetaResolution(7);
      vtkPolyDataMapper *sphereMapper = vtkPolyDataMapper::New();
        sphereMapper->SetInputConnection(sphere->GetOutputPort());
      vtkActor *sphereActor = vtkActor::New();
        sphereActor->SetMapper(sphereMapper);
      vtkActor *sphereActor2 = vtkActor::New();
        sphereActor2->SetMapper(sphereMapper);

      vtkConeSource *cone = vtkConeSource::New();
        cone->SetResolution(5);
      vtkGlyph3D *glyph = vtkGlyph3D::New();
        glyph->SetInputConnection(sphere->GetOutputPort());
        glyph->SetSourceConnection(cone->GetOutputPort());
        glyph->SetVectorModeToUseNormal();
        glyph->SetScaleModeToScaleByVector();
        glyph->SetScaleFactor(0.25);
      vtkPolyDataMapper *spikeMapper = vtkPolyDataMapper::New();
        spikeMapper->SetInputConnection(glyph->GetOutputPort());
      vtkActor *spikeActor = vtkActor::New();
        spikeActor->SetMapper(spikeMapper);
      vtkActor *spikeActor2 = vtkActor::New();
        spikeActor2->SetMapper(spikeMapper);

      spikeActor->SetPosition(0,0.7,0);
      sphereActor->SetPosition(0,0.7,0);
      spikeActor2->SetPosition(0,-1.0,-10);
      sphereActor2->SetPosition(0,-1.0,-10);
      spikeActor2->SetScale(1.5,1.5,1.5);
      sphereActor2->SetScale(1.5,1.5,1.5);

      ren1->AddActor(sphereActor);
      ren1->AddActor(spikeActor);
      ren1->AddActor(sphereActor2);
      ren1->AddActor(spikeActor2);
      ren1->SetBackground(0.1,0.2,0.4);
      renWin->SetSize(300,300);
      renWin->DoubleBufferOff();

      // do the first render and then zoom in a little
      renWin->Render();
      ren1->GetActiveCamera()->SetFocalPoint(0,0,0.0);
      ren1->GetActiveCamera()->Zoom(1.8);
      ren1->GetActiveCamera()->SetFocalDisk(0.05);

      renWin->Render();

      iren->Start();

      // Clean up allocated memory
      ren1->Delete();
      renWin->Delete();
      iren->Delete();
      sphere->Delete();
      sphereMapper->Delete();
      sphereActor->Delete();
      sphereActor2->Delete();
      cone->Delete();
      glyph->Delete();
      spikeMapper->Delete();
      spikeActor->Delete();
      spikeActor2->Delete();
      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(CameraBlur)

    find_package(VTK REQUIRED)
    include(${VTK_USE_FILE})

    add_executable(CameraBlur MACOSX_BUNDLE CameraBlur.cxx )

    target_link_libraries(CameraBlur ${VTK_LIBRARIES})

### Download and Build CameraBlur

Click here to download CameraBlur and its CMakeLists.txt file. Once the tarball CameraBlur.tar has been downloaded and extracted,

    cd CameraBlur/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:

    ./CameraBlur

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.