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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.awt.event.*;
+import java.awt.AWTEvent;
+import javax.media.j3d.*;
+import java.util.Enumeration;
+import javax.vecmath.*;
+
+// Mover behavior class - used to allow viewer to move using arrow keys
+class MoverBehavior extends Behavior
+{
+ WakeupOnAWTEvent w1 = new WakeupOnAWTEvent(KeyEvent.KEY_PRESSED);
+ WakeupCriterion[] w2 = {w1};
+ WakeupCondition w = new WakeupOr(w2);
+ TransformGroup viewTransformGroup;
+ double rotation = 0.0; // holds current rotation radians
+
+ public void initialize() {
+ // Establish initial wakeup criteria
+ wakeupOn(w);
+ }
+
+
+ /**
+ * Override Behavior's stimulus method to handle the event.
+ */
+ public void processStimulus(Enumeration criteria) {
+ WakeupOnAWTEvent ev;
+ WakeupCriterion genericEvt;
+ AWTEvent[] events;
+
+ while (criteria.hasMoreElements()) {
+ genericEvt = (WakeupCriterion) criteria.nextElement();
+ if (genericEvt instanceof WakeupOnAWTEvent) {
+ ev = (WakeupOnAWTEvent) genericEvt;
+ events = ev.getAWTEvent();
+ processManualEvent(events);
+ }
+ }
+ // Set wakeup criteria for next time
+ wakeupOn(w);
+ }
+
+
+ /**
+ * Process a keyboard event to move or rotate the viewer.
+ */
+ void processManualEvent(AWTEvent[] events) {
+
+ for (int i = 0; i < events.length; ++i) {
+ if (events[i] instanceof KeyEvent) {
+ KeyEvent event = (KeyEvent)events[i];
+ if (event.getKeyCode() == KeyEvent.VK_EQUALS) {
+ continue;
+ }
+ Transform3D t = new Transform3D();
+ viewTransformGroup.getTransform(t);
+ Vector3f viewDir = new Vector3f(0f, 0f, -1f);
+ Vector3f translation = new Vector3f();
+ t.get(translation);
+ t.transform(viewDir);
+ if (event.getKeyCode() == KeyEvent.VK_UP) {
+ translation.x += viewDir.x;
+ translation.y += viewDir.y;
+ translation.z += viewDir.z;
+ }
+ else if (event.getKeyCode() == KeyEvent.VK_DOWN) {
+ translation.x -= viewDir.x;
+ translation.y -= viewDir.y;
+ translation.z -= viewDir.z;
+ }
+ else if (event.getKeyCode() == KeyEvent.VK_RIGHT) {
+ rotation += -.1;
+ }
+ else if (event.getKeyCode() == KeyEvent.VK_LEFT) {
+ rotation += .1;
+ }
+ t.rotY(rotation);
+ t.setTranslation(translation);
+ viewTransformGroup.setTransform(t);
+ }
+ }
+ }
+
+
+ /**
+ * Constructor
+ */
+ public MoverBehavior(TransformGroup trans) {
+ viewTransformGroup = trans;
+ Bounds bound = new BoundingSphere(new Point3d(0.0,0.0,0.0),10000.0);
+ this.setSchedulingBounds(bound);
+ }
+}
+
+
+