//===========================================================================//=-------------------------------------------------------------------------=//= References:                                                             =//= [FUNK2003], Funkhouser, Thomas.  Min, Patrick. Kazhdan, Michael. Chen,  =//=     Joyce. Halderman, Alex. Dobkin, David. Jacobs, David. "A Search     =//=     Engine for 3D Models", ACM Transactions on Graphics, Vol 22. No1.   =//=     January 2003. Pp. 83-105                                            =//===========================================================================// JOGL classesimport javax.media.opengl.GL;import javax.media.opengl.GLCapabilities;import javax.media.opengl.GLAutoDrawable;import javax.media.opengl.GLEventListener;import javax.media.opengl.GLPbuffer;import javax.media.opengl.GLDrawableFactory;public class JoglOfflineRenderer implements GLEventListener {    private GLPbuffer  pbuffer;    private boolean ready;    private JoglProjectedViewRenderer renderer;    private boolean pbufferSupported;    public JoglOfflineRenderer(int imageWidth, int imageHeight, JoglProjectedViewRenderer renderer) {        this.renderer = renderer;        ready = false;        // Create a GLCapabilities object for the pbuffer        GLCapabilities pbCaps = new GLCapabilities();        pbCaps.setDoubleBuffered(false);        if ( !GLDrawableFactory.getFactory().canCreateGLPbuffer() ) {              pbufferSupported = false;              return;        }        try {            pbuffer = GLDrawableFactory.getFactory().createGLPbuffer(pbCaps, null, imageWidth, imageHeight, null);            pbufferSupported = true;            pbuffer.addGLEventListener(this);          }          catch ( Exception e ) {              System.err.println("Error creating OpenGL Pbuffer. This program requires a 3D accelerator card.");              pbuffer = null;              pbufferSupported = false;              return;        }    }    public boolean isPbufferSupported()    {        return pbufferSupported;    }    public void waitForMe()    {        if ( pbuffer == null ) {            return;        }        while ( !ready ) {            System.out.print("*");            try {                Thread.sleep(100);            }            catch ( Exception e ) {                ;            }        }    }    public void display(GLAutoDrawable drawable) {        GL gl = drawable.getGL();        renderer.draw(gl);        ready = true;    }    public void execute()    {        ready = false;        if ( pbuffer == null ) return;        pbuffer.display();    }    public void displayChanged(GLAutoDrawable gLDrawable, boolean modeChanged, boolean deviceChanged) {    }    public void init( GLAutoDrawable drawable ) {    }      public void reshape( GLAutoDrawable drawable, int x, int y, int width, int height )     {        GL gl = drawable.getGL();        gl.glViewport(0, 0, width, height);    }}//===========================================================================//= EOF                                                                     =//===========================================================================