# ProteinRibbons

VTKExamples/Java/Visualization/ProteinRibbons

### Description

vtkProteinRibbonFilter object is a polydata algorithm that generates protein ribbons. vtkPDBReader is a source object that reads Molecule files.

Other Languages

See (Cxx)

### Code

ProteinRibbons.java

    import vtk.vtkActor;
    import vtk.vtkNamedColors;
    import vtk.vtkNativeLibrary;
    import vtk.vtkRenderWindow;
    import vtk.vtkRenderWindowInteractor;
    import vtk.vtkRenderer;
    import vtk.vtkProteinRibbonFilter;
    import vtk.vtkPDBReader;
    import vtk.vtkInteractorStyleSwitch;
    import vtk.vtkPolyDataMapper;

    public class ProteinRibbons
    {
      // -----------------------------------------------------------------
      // Load VTK library and print which library was not properly loaded
      static
      {
        if (!vtkNativeLibrary.LoadAllNativeLibraries())
        {
          for (vtkNativeLibrary lib : vtkNativeLibrary.values())
          {
            if (!lib.IsLoaded())
            {
              System.out.println(lib.GetLibraryName() + " not loaded");
            }
          }
        }
        vtkNativeLibrary.DisableOutputWindow(null);
      }
      // -----------------------------------------------------------------

      public static void main(String args[])
      {

        //parse command line arguments
        if (args.length != 1)
        {
          System.err.println("Usage: java -classpath ... Filename(.pdb) e.g 2j6g.pdb");
          return;
        }
        String Filename = args[0];

        vtkNamedColors colors = new vtkNamedColors();

        //Renderer Background Color
        double Bgcolor[] = new double[4];

        colors.GetColor("Silver", Bgcolor);

        // read protein from pdb
        vtkPDBReader reader = new vtkPDBReader();
        reader.SetFileName(Filename);

        // setup ribbon filter
        vtkProteinRibbonFilter ribbonFilter = new vtkProteinRibbonFilter();
        ribbonFilter.SetInputConnection(reader.GetOutputPort());

        // setup poly data mapper
        vtkPolyDataMapper polyDataMapper = new vtkPolyDataMapper();
        polyDataMapper.SetInputConnection(ribbonFilter.GetOutputPort());

        // setup actor
        vtkActor actor = new vtkActor();
        actor.SetMapper(polyDataMapper);
        actor.GetProperty().SetDiffuse(.7);
        actor.GetProperty().SetSpecular(.5);
        actor.GetProperty().SetSpecularPower(80.0);

        // Create the renderer, render window and interactor.
        vtkRenderer ren = new vtkRenderer();
        vtkRenderWindow renWin = new vtkRenderWindow();
        renWin.AddRenderer(ren);
        vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
        iren.SetRenderWindow(renWin);

        vtkInteractorStyleSwitch style = new vtkInteractorStyleSwitch();
        style.SetCurrentStyleToTrackballCamera();

        // Visualise
        ren.AddActor(actor);
        ren.ResetCameraClippingRange();
        ren.SetBackground(Bgcolor);

        renWin.SetSize(300, 300);
        renWin.SetMultiSamples(0);
        renWin.Render();

        iren.Initialize();
        iren.Start();
      }
    }