Using JOGL in a Java applet

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You can use JOGL in a [http://download.oracle.com/javase/6/docs/technotes/guides/javaws/ Java applet, which lets you run Java programs embedded in a web page. This page shows an example of how to do this. The example program just draws one triangle that fills a fixed-size frame in a web page.

Base class

We'll use the same triangle-drawing base class for this example that we did in the Java Web Start example. Copy the code to a file called OneTriangle.java.

Applet class

Now we need a simple class that extends java.applet.Applet to form the top level of our program. Copy this code to a file called OneTriangleAWTApplet.java. 

package name.wadewalker.jogl2tests.onetriangle;

import java.applet.*;
import java.awt.*;

import javax.media.opengl.GLAnimatorControl;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;

import com.jogamp.opengl.util.FPSAnimator;

/**
 * A minimal applet that draws with JOGL in a browser window.
 *
 * @author Wade Walker
 */
@SuppressWarnings("serial")
public class OneTriangleAWTApplet extends Applet {

    private GLAnimatorControl glanimatorcontrol;

    public void init() {
        GLProfile.initSingleton( false );
        setLayout( new BorderLayout() );

        final GLCanvas glcanvas = new GLCanvas();
        glcanvas.addGLEventListener( new GLEventListener() {
            
            @Override
            public void reshape( GLAutoDrawable glautodrawable, int x, int y, int width, int height ) {
                OneTriangle.setup( glautodrawable.getGL().getGL2(), width, height );
            }
            
            @Override
            public void init( GLAutoDrawable glautodrawable ) {
            }
            
            @Override
            public void dispose( GLAutoDrawable glautodrawable ) {
            }
            
            @Override
            public void display( GLAutoDrawable glautodrawable ) {
                OneTriangle.render( glautodrawable.getGL().getGL2(), glautodrawable.getWidth(), glautodrawable.getHeight() );
            }
        });
    
        glcanvas.setSize( getSize() );
        add( glcanvas, BorderLayout.CENTER );
        glanimatorcontrol = new FPSAnimator( glcanvas, 30 );
    }

    public void start() {
        glanimatorcontrol.start();
    }
    
    public void stop() {
        glanimatorcontrol.stop();
    }
    
    public void destroy() {
    }
}

Applet web page

Finally, the applet needs a web page to display in. Note that this file sets the fixed size of the applet window. Copy this code to a file called OneTriangleApplet.html. 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>OneTriangle Applet Test</title>
</head>
<body>

<P>
Test of OneTriangle as an applet.
</P>

<P>

<applet code="org.jdesktop.applet.util.JNLPAppletLauncher"
      width=600
      height=400
      archive="applet-launcher.jar,
               newt.all.jar,
               nativewindow.all.jar,
               jogl.all.jar,
               gluegen-rt.jar,
               onetriangle.jar">
   <param name="codebase_lookup" value="false">
   <param name="subapplet.classname" value="name.wadewalker.jogl2tests.onetriangle.OneTriangleAWTApplet">
   <param name="subapplet.displayname" value="OneTriangle Applet">
   <param name="noddraw.check" value="true">
   <param name="progressbar" value="true">
   <param name="jnlpNumExtensions" value="1">
   <param name="jnlpExtension1" value="JOGL.jnlp">
   <param name="jnlp_href" value="OneTriangleApplet.jnlp">
</applet>

</P>

<P>
The applet should be above this.
</P>

</body>
</html>

Setting up the applet directory

  • Create a directory to hold your applet.
  • Put your OneTriangleApplet.html file in that new directory.
  • Create a subdirectory name/wadewalker/jogl2tests/onetriangle inside your applet directory. Or if you changed the packages of the files above, create a subdirectory that matches your package names.
  • Put your OneTriangle.java and OneTriangleAWT.java files inside the subdirectory.
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