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1  Java Game APIs & Engines / JOGL Development / Re: (GL)JPanel w/o GLEventListener on: 2008-10-20 13:45:11
Following test-code doesnt work:

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import java.awt.Dimension;
import javax.media.opengl.*;
import javax.swing.*;
import com.sun.opengl.impl.Java2D;

public final class Window extends JFrame {

   public Window() {
      super("Titel");

      JPanel panel = new JPanel(null);
      panel.setPreferredSize(new Dimension(640, 480));
      panel.setSize(640, 480);
      add(panel);

      Java2D.invokeWithOGLContextCurrent(panel.getGraphics(),
         new Runnable() {

            @Override
            public void run() {
               drawable =
                  GLDrawableFactory.getFactory().createExternalGLDrawable();

               context =
                  GLDrawableFactory.getFactory().createExternalGLContext();
            }

      });

      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      pack(); setResizable(false); setVisible(true);

      try {
         context.makeCurrent();
      } catch (Exception e) {
         e.printStackTrace();
      }

      GL gl = context.getGL();

      gl.glMatrixMode(GL.GL_PROJECTION); gl.glLoadIdentity();
      gl.glOrtho(-4d / 3d, 4d / 3d, -1d, 1d, 0d, 1d);

      gl.glMatrixMode(GL.GL_MODELVIEW); gl.glLoadIdentity();
      gl.glViewport(0, 0, 640, 480);

      gl.glClear(GL.GL_COLOR_BUFFER_BIT);
      gl.glRectf(-.8f, -.8f, .8f, .8f);

      gl.glFinish();

      drawable.swapBuffers(); // ?
     panel.repaint(); // ?

      context.release();
   }

   private GLDrawable drawable;
   private GLContext context;

   private static final long serialVersionUID = 0l;

   /**
    * Startet die Anwendung.
    * @param args Nicht verwendet
    */

   public static void main(String[] args) {
      java.awt.EventQueue.invokeLater(new Runnable() {
         @Override public void run() {new Window();}
      });
   }

}


Any ideas? Cheers, Chris
2  Java Game APIs & Engines / JOGL Development / (GL)JPanel w/o GLEventListener on: 2008-10-19 11:53:22
Hello Javagaming-People,

is there a simple solution to connect OpenGL-Renderings to the JPanel Buffer? I dont want to use the GLEventListener/single-thread. I think of single-buffered OGL to double-buffered JPanel (if ogl to jpanel-(front/back)buffer-switch goes fast) or double-buffer OGL to single-buffered JPanel (if there are some advantages). Does anyone have experience with this.

I have read the sources (GLJPanel.java) but there seem to be many graca-vendor spec. "hacks" (sorry). So, before i do longtime-experiments, i ask here for some solutions (should be small & simple).

Eventually, the best aprroach is the combination of JPanel/BufferStrategy/direct OGL to JPanel-Buffer rendering?!

Thanks for your ideas! Cheers, Chris

PS: Sorry for my english...
3  Java Game APIs & Engines / JOGL Development / (Solved) Output disappears after 1 second on: 2008-10-02 10:21:42
I have disabled the visual effects of the OS (Ubuntu 8.04). Thereafter it works.

Cheers, Chris
4  Java Game APIs & Engines / JOGL Development / Output disappears after 1 second on: 2008-10-01 13:37:12
Hello Javagaming-People,

i have some problem with Jogl on my new Ubuntu 8.04 machine. If i start the App (Jogl, JFrame, GLEventListener) the output ist for a half second the correct picture and then it disappears and only a grey window is visible. If i toggle between maximize and normal window, the output is for a very short time shown and disappears again. Under Windows the same sourcecode acts as expected.

Thanks for your help!

Cheers, Chris

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import javax.media.opengl.*;
import javax.swing.JFrame;

public final class Main extends JFrame implements GLEventListener {

   public Main() {
      GLCanvas canvas = new GLCanvas();
      canvas.setSize(640, 480);
      canvas.addGLEventListener(this);
      add(canvas);

      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      pack();
      setVisible(true);
   }

   @Override
   public void init(GLAutoDrawable drawable) {
      GL gl = drawable.getGL();

      gl.glMatrixMode(GL.GL_PROJECTION);
      gl.glLoadIdentity();
      gl.glOrtho(-4d / 3d, 4d / 3d, -1d, 1d, 0d, 2d);

      gl.glMatrixMode(GL.GL_MODELVIEW);
      gl.glLoadIdentity();
   }

   @Override
   public void display(GLAutoDrawable drawable) {
      GL gl = drawable.getGL();

      gl.glClear(GL.GL_COLOR_BUFFER_BIT);

      gl.glRectf(-.8f, -.8f, .8f, .8f);
   }

   @Override
   public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
      boolean deviceChanged) {}

   @Override
   public void reshape(GLAutoDrawable drawable, int x, int y, int width,
      int height) {}

   private static final long serialVersionUID = 0l;

   /**
    * Startet die Anwendung.
    * @param args Nicht verwendet
    */

   public static void main(String[] args) {
      new Main();
   }

}
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