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# ReadOBJ

VTKEx/Java/IO/ReadOBJ

### Description

This example demonstrates how to read a Wavefront OBJ file. The result is displayed.

Other languages

See (Cxx), (CSharp)

Question

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### Code

ReadOBJ.java

    import vtk.vtkActor;
    import vtk.vtkNamedColors;
    import vtk.vtkNativeLibrary;
    import vtk.vtkPolyDataMapper;
    import vtk.vtkRenderWindow;
    import vtk.vtkRenderWindowInteractor;
    import vtk.vtkRenderer;
    import vtk.vtkOBJReader;

    public class ReadOBJ
    {
      // -----------------------------------------------------------------
      // 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(.obj) e.g trumpet.obj");
          return;
        }
        String inputFilename = args[0];

        vtkNamedColors colors = new vtkNamedColors();

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

        colors.GetColor("HoneyDew", actorColor);
        colors.GetColor("SpringGreen", Bgcolor);

        vtkOBJReader reader = new vtkOBJReader();
        reader.SetFileName(inputFilename);
        reader.Update();

        vtkPolyDataMapper mapper = new vtkPolyDataMapper();
        mapper.SetInputConnection(reader.GetOutputPort());

        vtkActor actor = new vtkActor();
        actor.SetMapper(mapper);
        actor.GetProperty().SetDiffuseColor(actorColor);

        // 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);

        // Visualize
        ren.AddActor(actor);
        ren.SetBackground(Bgcolor);
        ren.ResetCamera();
        ren.GetActiveCamera().Azimuth(30);
        ren.GetActiveCamera().Elevation(30);
        ren.GetActiveCamera().Dolly(1.5);
        ren.ResetCameraClippingRange();

        renWin.SetSize(640, 480);
        renWin.Render();

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