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diff --git a/src/PureImmediate/PureImmediateStereo.java b/src/PureImmediate/PureImmediateStereo.java
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+/*
+ * $RCSfile$
+ *
+ * Copyright (c) 2004 Sun Microsystems, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistribution in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * This software is provided "AS IS," without a warranty of any
+ * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
+ * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
+ * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
+ * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
+ * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
+ * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
+ * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
+ * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
+ * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ *
+ * You acknowledge that this software is not designed, licensed or
+ * intended for use in the design, construction, operation or
+ * maintenance of any nuclear facility.
+ *
+ * $Revision$
+ * $Date$
+ * $State$
+ */
+
+import java.applet.Applet;
+import java.awt.*;
+import java.util.*;
+import java.awt.event.*;
+import com.sun.j3d.utils.applet.MainFrame;
+import com.sun.j3d.utils.universe.*;
+import com.sun.j3d.utils.geometry.*;
+import javax.media.j3d.*;
+import javax.vecmath.*;
+
+/**
+ * Pure immediate mode stereo example program for stereo. In pure 
+ * immediate mode, the renderer must be stopped on the Canvas being 
+ * rendered into. In our example, this is done immediately after the 
+ * canvas is created. A separate thread is started up to do the 
+ * immediate mode rendering.
+ */
+public class PureImmediateStereo extends Applet implements Runnable {
+
+    // Set this to true when the graphics card use shared z buffer 
+    // in stereo mode.
+    public static String defaultSharedStereoZbuffer = Boolean.TRUE.toString();
+
+    private boolean sharedStereoZbuffer;
+    private boolean stereoSupport;    
+    private Canvas3D canvas;
+    private GraphicsContext3D gc;
+    private Shape3D leftConeBody, rightConeBody;
+    private Shape3D leftConeCap, rightConeCap;
+    private Transform3D cmt = new Transform3D();
+    private Vector3f leftTrans, rightTrans;
+
+    // One rotation (2*PI radians) every 6 seconds
+    private Alpha rotAlpha = new Alpha(-1, 6000);
+    private SimpleUniverse u = null;
+    private double angle;
+
+    // Compute data which is common for both
+    // left and right eye
+    void computeSharedData() {
+	// Compute angle of rotation based on alpha value
+	angle = rotAlpha.value() * 2.0*Math.PI;
+	cmt.rotY(angle);	
+    }
+
+    // Render the geometry in right eye
+    void renderLeft() {
+ 	cmt.setTranslation(leftTrans);
+	gc.setModelTransform(cmt);
+
+	if (sharedStereoZbuffer) {
+	    // Graphics card shared same z buffer in stereo mode,
+	    // in this case we have to explicitly clearing both
+	    // frame buffers.
+	    gc.clear(); 	    
+	}
+	gc.draw(leftConeBody);
+	gc.draw(leftConeCap);
+    }
+
+    // Render the geometry for right eye
+     void renderRight() {
+	cmt.setTranslation(rightTrans);
+	gc.setModelTransform(cmt);
+
+	if (sharedStereoZbuffer) {
+	    // Graphics card shared same z buffer in stereo mode,
+	    // in this case we have to explicitly clearing both
+	    // frame buffers.
+	    gc.clear(); 	    
+	}
+	gc.draw(rightConeBody);
+	gc.draw(rightConeCap);
+    }
+
+    //
+    // Run method for our immediate mode rendering thread.
+    //
+    public void run() {
+	// Set up Graphics context
+	gc = canvas.getGraphicsContext3D();
+
+	// We always need to set this for PureImmediate 
+	// stereo mode
+        gc.setBufferOverride(true);
+
+	Color3f lightColor = new Color3f(1, 1, 1);
+	Vector3f lightDir = new Vector3f(0, 0, -1);
+	DirectionalLight light = new DirectionalLight(lightColor,
+						      lightDir);
+					  
+	gc.addLight(light);
+
+	Appearance redApp = new Appearance();
+	Appearance greenApp = new Appearance();
+	Color3f ambientColor = new Color3f(0, 0, 0);
+	Color3f emissiveColor = new Color3f(0, 0, 0);	
+	Color3f diffuseColor =  new Color3f(1, 0, 0);	
+	Color3f specularColor =  new Color3f(1, 1, 1);	
+	redApp.setMaterial(new Material(ambientColor, emissiveColor,
+					diffuseColor, specularColor, 5));
+	diffuseColor =  new Color3f(0, 1, 0);	
+
+	greenApp.setMaterial(new Material(ambientColor, emissiveColor,
+					  diffuseColor, specularColor, 5));
+
+	// Set up geometry
+	Cone leftCone = new Cone(0.4f, 0.6f,
+				 Primitive.GENERATE_NORMALS, redApp);
+	Cone rightCone = new Cone(0.4f, 0.6f,
+				  Primitive.GENERATE_NORMALS, greenApp);
+	leftConeBody  = leftCone.getShape(Cone.BODY);
+	leftConeCap   = leftCone.getShape(Cone.CAP);
+
+	rightConeBody = rightCone.getShape(Cone.BODY);
+	rightConeCap  = rightCone.getShape(Cone.CAP);
+	leftTrans = new Vector3f(-0.6f, 0, 0); 
+	rightTrans = new Vector3f(0.6f, 0, 0); 	
+
+
+	while (true) {
+	    // compute data which is can be used
+	    // for both left and right eye
+	    computeSharedData();
+
+	    if (stereoSupport) {	    
+		if (!sharedStereoZbuffer) {
+		    gc.setStereoMode(GraphicsContext3D.STEREO_BOTH);	    
+		    // This clear both left and right buffers, we
+		    // must set STEREO_BOTH before it. Otherwise
+		    // it only clear LEFT or RIGHT buffer unless
+		    // this is invoke twice for each buffer.
+		    gc.clear(); 
+		}
+
+		gc.setStereoMode(GraphicsContext3D.STEREO_LEFT);
+		renderLeft();
+		
+		gc.setStereoMode(GraphicsContext3D.STEREO_RIGHT);
+		renderRight();
+	    } else {
+		gc.clear(); 
+		renderLeft();
+	    }
+
+	    // This swap both left and right buffers so 
+	    // there is no need to set STEREO_BOTH before it
+	    canvas.swap();
+
+	    // Be polite to other threads !
+	    Thread.yield();
+	}
+    }
+
+
+    public PureImmediateStereo() {
+    }
+
+    //
+    // init: create the canvas, stop the renderer,
+    // create the universe, and start the drawing thread.
+    //
+    public void init() {
+	setLayout(new BorderLayout());
+
+	// Preferred to use Stereo 
+	GraphicsConfigTemplate3D gct = new GraphicsConfigTemplate3D();
+        gct.setStereo(GraphicsConfigTemplate3D.PREFERRED);
+
+        GraphicsConfiguration config = 
+	    GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getBestConfiguration(gct);
+
+        canvas = new Canvas3D(config);
+	Map map = canvas.queryProperties();
+
+	stereoSupport = canvas.getStereoAvailable();
+
+	if (stereoSupport) {
+	    System.out.println("This machine support stereo, you should see a red cone on the left and green cone on the right.");
+	    // User can overide the above default behavior using
+	    // java3d property.
+	    String str = System.getProperty("j3d.sharedstereozbuffer",
+					    defaultSharedStereoZbuffer);
+	    sharedStereoZbuffer = (new Boolean(str)).booleanValue();
+	} else {
+	    System.out.println("Stereo is not support, you should only see the left red cone.");
+	}
+	
+	if (!canvas.getDoubleBufferAvailable()) {
+	    System.out.println("Double buffer is not support !");
+	}
+
+	// we must stop the Renderer in PureImmediate mode
+        canvas.stopRenderer();
+	add("Center", canvas);
+
+	// Create the universe and viewing branch
+	u = new SimpleUniverse(canvas);
+
+        // This will move the ViewPlatform back a bit so the
+        // objects in the scene can be viewed.
+        u.getViewingPlatform().setNominalViewingTransform();
+
+	// Start a new thread that will continuously render
+	(new Thread(this)).start();
+    }
+
+    // Cleanup all Java3D threads and memory when this applet exit
+    public void destroy() {
+	u.cleanup();
+    }
+
+    //
+    // The following allows PureImmediateStereo to be run as an application
+    // as well as an applet
+    //
+    public static void main(String[] args) {
+	new MainFrame(new PureImmediateStereo(), 512, 256);
+    }
+}