1 files changed, 90 insertions, 0 deletions
diff --git a/src/TickTockCollision/CollisionDetector.java b/src/TickTockCollision/CollisionDetector.java
new file mode 100644
index 0000000..bf5c17f
--- /dev/null
+++ b/src/TickTockCollision/CollisionDetector.java
@@ -0,0 +1,90 @@
+/*
+ * $RCSfile$
+ *
+ * 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.util.Enumeration;
+import javax.media.j3d.*;
+import javax.vecmath.*;
+
+public class CollisionDetector extends Behavior {
+    private static final Color3f highlightColor =
+	new Color3f(0.0f, 1.0f, 0.0f);
+    private static final ColoringAttributes highlight =
+	new ColoringAttributes(highlightColor,
+			       ColoringAttributes.SHADE_GOURAUD);
+
+    private boolean inCollision = false;
+    private Shape3D shape;
+    private ColoringAttributes shapeColoring;
+    private Appearance shapeAppearance;
+
+    private WakeupOnCollisionEntry wEnter;
+    private WakeupOnCollisionExit wExit;
+
+
+    public CollisionDetector(Shape3D s) {
+	shape = s;
+	shapeAppearance = shape.getAppearance();
+	shapeColoring = shapeAppearance.getColoringAttributes();
+	inCollision = false;
+    }
+
+    public void initialize() {
+	wEnter = new WakeupOnCollisionEntry(shape);
+	wExit = new WakeupOnCollisionExit(shape);
+	wakeupOn(wEnter);
+    }
+
+    public void processStimulus(Enumeration criteria) {
+	inCollision = !inCollision;
+
+	if (inCollision) {
+	    shapeAppearance.setColoringAttributes(highlight);
+	    wakeupOn(wExit);
+	}
+	else {
+	    shapeAppearance.setColoringAttributes(shapeColoring);
+	    wakeupOn(wEnter);
+	}
+    }
+}