# CylinderRenderingProperties

VTKExamples/Cxx/Rendering/CylinderRenderingProperties

This example creates a minimal visualization program, demonstrating VTK's basic rendering and pipeline creation. See also the Java, Python and Tcl versions of this example.

### Code

CylinderRenderingProperties.cxx

    #include "vtkCylinderSource.h"
    #include "vtkPolyDataMapper.h"
    #include "vtkActor.h"
    #include "vtkRenderer.h"
    #include "vtkRenderWindow.h"
    #include "vtkRenderWindowInteractor.h"
    #include "vtkProperty.h"
    #include "vtkCamera.h"
    #include "vtkSmartPointer.h"

    int main(int, char *[])
    {
      // This creates a polygonal cylinder model with eight circumferential facets
      // (i.e, in practice an octagonal prism).
      vtkSmartPointer<vtkCylinderSource> cylinder =
        vtkSmartPointer<vtkCylinderSource>::New();
      cylinder->SetResolution(8);

      // The mapper is responsible for pushing the geometry into the graphics library.
      // It may also do color mapping, if scalars or other attributes are defined.
      vtkSmartPointer<vtkPolyDataMapper> cylinderMapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
      cylinderMapper->SetInputConnection(cylinder->GetOutputPort());

      // The actor is a grouping mechanism: besides the geometry (mapper), it
      // also has a property, transformation matrix, and/or texture map.
      // Here we set its color and rotate it around the X and Y axes.
      vtkSmartPointer<vtkActor> cylinderActor =
        vtkSmartPointer<vtkActor>::New();
      cylinderActor->SetMapper(cylinderMapper);
      cylinderActor->GetProperty()->SetColor(1.0000, 0.3882, 0.2784);
      cylinderActor->RotateX(30.0);
      cylinderActor->RotateY(-45.0);

      // The renderer generates the image
      // which is then displayed on the render window.
      // It can be thought of as a scene to which the actor is added
      vtkSmartPointer<vtkRenderer> renderer =
        vtkSmartPointer<vtkRenderer>::New();
      renderer->AddActor(cylinderActor);
      renderer->SetBackground(0.1, 0.2, 0.4);
      // Zoom in a little by accessing the camera and invoking its "Zoom" method.
      renderer->ResetCamera();
      renderer->GetActiveCamera()->Zoom(1.5);

      // The render window is the actual GUI window
      // that appears on the computer screen
      vtkSmartPointer<vtkRenderWindow> renderWindow =
        vtkSmartPointer<vtkRenderWindow>::New();
      renderWindow->SetSize(200, 200);
      renderWindow->AddRenderer(renderer);

      // The render window interactor captures mouse events
      // and will perform appropriate camera or actor manipulation
      // depending on the nature of the events.
      vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
        vtkSmartPointer<vtkRenderWindowInteractor>::New();
      renderWindowInteractor->SetRenderWindow(renderWindow);

      // This starts the event loop and as a side effect causes an initial render.
      renderWindowInteractor->Start();

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(CylinderRenderingProperties)

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

    add_executable(CylinderRenderingProperties MACOSX_BUNDLE CylinderRenderingProperties.cxx)

    target_link_libraries(CylinderRenderingProperties ${VTK_LIBRARIES})

### Download and Build CylinderRenderingProperties

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

    cd CylinderRenderingProperties/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:

    ./CylinderRenderingProperties

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.