# HelloVTKWorld.java

    /*=========================================================================

      Program: GDCM (Grassroots DICOM). A DICOM library
      Module:  $URL$

      Copyright (c) 2006-2010 Mathieu Malaterre
      All rights reserved.
      See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.

         This software is distributed WITHOUT ANY WARRANTY; without even
         the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
         PURPOSE.  See the above copyright notice for more information.

    =========================================================================*/
    // We are required to call the package 'vtk' eventhough I (MM) would have prefered
    // an import statement along the line of:
    // import vtkgdcm.*;
    import vtk.*;

    /*
     * Compilation:
     * $ CLASSPATH=/home/mmalaterre/Projects/gdcm/debug-gcc43/bin/vtkgdcm.jar:/home/mmalaterre/Projects/VTK54-gcc/bin/vtk.jar javac HelloVTKWorld.java
     *
     * Usage:
     * LD_LIBRARY_PATH=/usr/lib/jvm/java-6-sun-1.6.0.07/jre/lib/amd64/xawt/:/home/mmalaterre/Projects/gdcm/debug-gcc43/bin/:/home/mmalaterre/Projects/VTK54-gcc/bin/ CLASSPATH=/home/mmalaterre/Projects/gdcm/debug-gcc43/bin/vtkgdcm.jar:/home/mmalaterre/Projects/VTK54-gcc/bin/vtk.jar:. java HelloVTKWorld ~/Creatis/gdcmData/012345.002.050.dcm out.dcm
     *
     */
    public class HelloVTKWorld
    {
      static {
        System.loadLibrary("vtkCommonJava");
        System.loadLibrary("vtkFilteringJava");
        System.loadLibrary("vtkIOJava");
        System.loadLibrary("vtkImagingJava");
        System.loadLibrary("vtkGraphicsJava");
        System.loadLibrary("vtkRenderingJava");
        System.loadLibrary("vtkgdcmJava");
        try {
          System.loadLibrary("vtkHybridJava");
        } catch (Throwable e) {
          System.out.println("cannot load vtkHybrid, skipping...");
        }
        try {
          System.loadLibrary("vtkVolumeRenderingJava");
        } catch (Throwable e) {
          System.out.println("cannot load vtkVolumeRendering, skipping...");
        }
      }

      public static void main(String[] args)
        {
        String filename = args[0];
        vtkGDCMImageReader reader = new vtkGDCMImageReader();
        reader.SetFileName( filename );
        reader.Update();

        vtkMedicalImageProperties prop = reader.GetMedicalImageProperties();
        System.out.println( prop.GetPatientName() ); //

    //    if( reader.GetImageFormat() == vtkgdcm.vtkgdcm.VTK_LUMINANCE ) // MONOCHROME2
    //      {
    //      System.out.println( "Image is MONOCHROME2" ); //
    //      }

        // Just for fun, invert the direction cosines, output should reflect that:
        vtkMatrix4x4 dircos = reader.GetDirectionCosines();
        dircos.Invert();

        // We need to maintain in sync information stored in vtkMedicalImageProperties:
        double[] cosines = new double[6];
        cosines[0] = dircos.GetElement(0,0);
        cosines[1] = dircos.GetElement(1,0);
        cosines[2] = dircos.GetElement(2,0);
        cosines[3] = dircos.GetElement(0,1);
        cosines[4] = dircos.GetElement(1,1);
        cosines[5] = dircos.GetElement(2,1);
        reader.GetMedicalImageProperties().SetDirectionCosine( cosines );

        String outfilename = args[1];
        vtkGDCMImageWriter writer = new vtkGDCMImageWriter();
        writer.SetMedicalImageProperties( reader.GetMedicalImageProperties() );
        writer.SetDirectionCosines( dircos );
        writer.SetShift( reader.GetShift() );
        writer.SetScale( reader.GetScale() );
        writer.SetImageFormat( reader.GetImageFormat() );
        writer.SetFileName( outfilename );
        //writer.SetInputConnection( reader.GetOutputPort() ); // new
        writer.SetInput( reader.GetOutput() ); // old
        writer.Write();

        System.out.println("Success reading: " + filename );
        }
    }