Initial creation of j3d-examples sources in CVS repository

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diff --git a/src/GearTest/SpurGear.java b/src/GearTest/SpurGear.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.lang.Math.*;
+import javax.media.j3d.*;
+import javax.vecmath.*;
+
+public class SpurGear extends Gear {
+    
+    float toothTopAngleIncrement;
+    float toothDeclineAngleIncrement;
+
+    float rootRadius;
+    float outsideRadius;
+
+    //The angle subtended by the ascending or descending portion of a tooth
+    float circularToothEdgeAngle;
+    // The angle subtended by a flat (either a tooth top or a valley
+    // between teeth
+    float circularToothFlatAngle;
+
+    /**
+     * internal constructor for SpurGear, used by subclasses to establish
+     * SpurGear's required state
+     * @return a new spur gear that contains sufficient information to
+     * continue building
+     * @param toothCount number of teeth
+     * @param pitchCircleRadius radius at center of teeth
+     * @param addendum distance from pitch circle to top of teeth
+     * @param dedendum distance from pitch circle to root of teeth
+     * @param toothToValleyAngleRatio the ratio of the angle subtended by the
+     * tooth to the angle subtended by the valley (must be <= .25) 
+     */
+    SpurGear(int toothCount, float pitchCircleRadius,
+	     float addendum, float dedendum, float toothToValleyAngleRatio) {
+	
+	super(toothCount);
+	
+	// The angle about Z subtended by one tooth and its associated valley
+	circularPitchAngle = (float)(2.0 * Math.PI / (double)toothCount);
+
+	// The angle subtended by a flat (either a tooth top or a valley
+	// between teeth
+	circularToothFlatAngle = circularPitchAngle * toothToValleyAngleRatio;
+
+	//The angle subtended by the ascending or descending portion of a tooth
+	circularToothEdgeAngle = circularPitchAngle/2.0f -
+	    circularToothFlatAngle;
+
+	// Increment angles
+	toothTopAngleIncrement = circularToothEdgeAngle;
+	toothDeclineAngleIncrement
+	    = toothTopAngleIncrement + circularToothFlatAngle;
+	toothValleyAngleIncrement
+	    = toothDeclineAngleIncrement + circularToothEdgeAngle;
+
+	// Differential angles for offsetting to the center of tooth's top
+	// and valley
+	toothTopCenterAngle
+	    = toothTopAngleIncrement + circularToothFlatAngle/2.0f;
+	valleyCenterAngle
+	    = toothValleyAngleIncrement +  circularToothFlatAngle/2.0f;
+
+	// Gear start differential angle. All gears are constructed with the
+	// center of a tooth at Z-axis angle = 0.
+	gearStartAngle = -1.0 * toothTopCenterAngle;
+
+	// The radial distance to the root and top of the teeth, respectively
+	rootRadius = pitchCircleRadius - dedendum;
+	outsideRadius = pitchCircleRadius + addendum;
+    
+	// Allow this object to spin. etc.
+	this.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
+    }
+
+    /**
+     * Construct a SpurGear;
+     * @return a new spur gear that conforms to the input paramters
+     * @param toothCount number of teeth
+     * @param pitchCircleRadius radius at center of teeth
+     * @param shaftRadius radius of hole at center
+     * @param addendum distance from pitch circle to top of teeth
+     * @param dedendum distance from pitch circle to root of teeth
+     * @param gearThickness  thickness of the gear
+     */
+    public SpurGear(int toothCount, float pitchCircleRadius, float shaftRadius,
+		    float addendum, float dedendum, float gearThickness) {
+	this(toothCount, pitchCircleRadius, shaftRadius, addendum, dedendum,
+	     gearThickness, gearThickness, 0.25f, null);
+    }
+
+    /**
+     * Construct a SpurGear;
+     * @return a new spur gear that conforms to the input paramters
+     * @param toothCount number of teeth
+     * @param pitchCircleRadius radius at center of teeth
+     * @param shaftRadius radius of hole at center
+     * @param addendum distance from pitch circle to top of teeth
+     * @param dedendum distance from pitch circle to root of teeth
+     * @param gearThickness  thickness of the gear
+     * @param look the gear's appearance
+     */
+    public SpurGear(int toothCount, float pitchCircleRadius, float shaftRadius,
+		    float addendum, float dedendum, float gearThickness,
+		    Appearance look) {
+	this(toothCount, pitchCircleRadius, shaftRadius, addendum, dedendum,
+	     gearThickness, gearThickness, 0.25f, look);
+    }
+
+    /**
+     * Construct a SpurGear;
+     * @return a new spur gear that conforms to the input paramters
+     * @param toothCount number of teeth
+     * @param pitchCircleRadius radius at center of teeth
+     * @param shaftRadius radius of hole at center
+     * @param addendum distance from pitch circle to top of teeth
+     * @param dedendum distance from pitch circle to root of teeth
+     * @param gearThickness thickness of the gear
+     * @param toothTipThickness thickness of the tip of the tooth
+     * @param look the gear's appearance
+     */
+    public SpurGear(int toothCount, float pitchCircleRadius, float shaftRadius,
+		    float addendum, float dedendum, float gearThickness,
+		    float toothTipThickness, Appearance look) {
+	this(toothCount, pitchCircleRadius, shaftRadius, addendum, dedendum,
+	     gearThickness, toothTipThickness, 0.25f, look);
+	}
+
+    /**
+     * Construct a SpurGear;
+     * @return a new spur gear that conforms to the input paramters
+     * @param toothCount number of teeth
+     * @param pitchCircleRadius radius at center of teeth
+     * @param shaftRadius radius of hole at center
+     * @param addendum distance from pitch circle to top of teeth
+     * @param dedendum distance from pitch circle to root of teeth
+     * @param gearThickness thickness of the gear
+     * @param toothTipThickness thickness of the tip of the tooth
+     * @param toothToValleyAngleRatio the ratio of the angle subtended by the
+     * tooth to the angle subtended by the valley (must be <= .25) 
+     * @param look the gear's appearance object
+     */
+    public SpurGear(int toothCount, float pitchCircleRadius, float shaftRadius,
+		    float addendum, float dedendum, float gearThickness,
+		    float toothTipThickness, float toothToValleyAngleRatio,
+		    Appearance look) {
+
+    this(toothCount, pitchCircleRadius, addendum, dedendum,
+	 toothToValleyAngleRatio);
+
+	// Generate the gear's body disks
+	addBodyDisks(shaftRadius, rootRadius, gearThickness, look);
+	
+	// Generate the gear's interior shaft
+	addCylinderSkins(shaftRadius, gearThickness, InwardNormals, look);
+
+	// Generate the gear's teeth
+	addTeeth(pitchCircleRadius, rootRadius,
+		 outsideRadius, gearThickness, toothTipThickness,
+		 toothToValleyAngleRatio, look);
+    }
+
+    /**
+     * Construct a SpurGear's teeth by adding the teeth shape nodes
+     * @param pitchCircleRadius radius at center of teeth
+     * @param rootRadius distance from pitch circle to top of teeth
+     * @param outsideRadius distance from pitch circle to root of teeth
+     * @param gearThickness thickness of the gear
+     * @param toothTipThickness thickness of the tip of the tooth
+     * @param toothToValleyAngleRatio the ratio of the angle subtended by the
+     * tooth to the angle subtended by the valley (must be <= .25) 
+     * @param look the gear's appearance object
+     */
+    void addTeeth(float pitchCircleRadius, float rootRadius,
+		  float outsideRadius, float gearThickness,
+		  float toothTipThickness, float toothToValleyAngleRatio,
+		  Appearance look) {
+	int index;
+	Shape3D newShape;
+	
+	// Temporaries that store start angle for each portion of tooth facet
+	double toothStartAngle, toothTopStartAngle,
+	    toothDeclineStartAngle, toothValleyStartAngle,
+	    nextToothStartAngle;
+
+	// The x and y coordinates at each point of a facet and at each
+	// point on the gear: at the shaft, the root of the teeth, and
+	// the outer point of the teeth
+	float xRoot0, yRoot0;
+	float xOuter1, yOuter1;
+	float xOuter2, yOuter2;
+	float xRoot3, yRoot3;
+	float xRoot4, yRoot4;
+
+	// The z coordinates for the gear
+	final float frontZ = -0.5f * gearThickness;
+	final float rearZ = 0.5f * gearThickness;
+
+	// The z coordinates for the tooth tip of the gear
+	final float toothTipFrontZ = -0.5f * toothTipThickness;
+	final float toothTipRearZ = 0.5f * toothTipThickness;
+
+	int toothFacetVertexCount;		// #(vertices) per tooth facet
+	int toothFacetCount;			// #(facets) per tooth
+	int toothFaceTotalVertexCount;          // #(vertices) in all teeth
+	int toothFaceStripCount[] = new int[toothCount];
+						// per tooth vertex count
+	int topVertexCount;			// #(vertices) for teeth tops
+	int topStripCount[] = new int[1];	// #(vertices) in strip/strip
+
+	// Front and rear facing normals for the teeth faces
+	Vector3f frontToothNormal = new Vector3f(0.0f, 0.0f, -1.0f);
+	Vector3f rearToothNormal = new Vector3f(0.0f, 0.0f, 1.0f);
+
+	// Normals for teeth tops up incline, tooth top, and down incline
+	Vector3f leftNormal = new Vector3f(-1.0f, 0.0f, 0.0f);
+	Vector3f rightNormal = new Vector3f(1.0f, 0.0f, 0.0f);
+	Vector3f outNormal = new Vector3f(1.0f, 0.0f, 0.0f);
+	Vector3f inNormal = new Vector3f(-1.0f, 0.0f, 0.0f);
+
+	// Temporary variables for storing coordinates and vectors 
+	Point3f coordinate = new Point3f(0.0f, 0.0f, 0.0f);
+	Point3f tempCoordinate1 = new Point3f(0.0f, 0.0f, 0.0f);
+	Point3f tempCoordinate2 = new Point3f(0.0f, 0.0f, 0.0f);
+	Point3f tempCoordinate3 = new Point3f(0.0f, 0.0f, 0.0f);
+	Vector3f tempVector1 = new Vector3f(0.0f, 0.0f, 0.0f);
+	Vector3f tempVector2 = new Vector3f(0.0f, 0.0f, 0.0f);
+
+	/* Construct the gear's front facing teeth facets
+	 *	   0______2
+	 *         /     /\
+	 *        /   /    \
+	 *       /  /       \
+	 *      //___________\
+	 *     1              3
+	 */
+	toothFacetVertexCount = 4;
+	toothFaceTotalVertexCount = toothFacetVertexCount * toothCount;
+	for(int i = 0; i < toothCount; i++)
+	    toothFaceStripCount[i] = toothFacetVertexCount;
+
+	TriangleStripArray frontGearTeeth
+	    = new TriangleStripArray(toothFaceTotalVertexCount,
+				     GeometryArray.COORDINATES
+				     | GeometryArray.NORMALS,
+				     toothFaceStripCount);
+
+	for(int count = 0; count < toothCount; count++) {
+	    index = count * toothFacetVertexCount;
+
+	    toothStartAngle
+		= gearStartAngle + circularPitchAngle * (double)count;
+	    toothTopStartAngle = toothStartAngle + toothTopAngleIncrement;
+	    toothDeclineStartAngle
+		= toothStartAngle + toothDeclineAngleIncrement;
+	    toothValleyStartAngle
+		= toothStartAngle + toothValleyAngleIncrement;
+
+	    xRoot0 = rootRadius * (float)Math.cos(toothStartAngle);
+	    yRoot0 = rootRadius * (float)Math.sin(toothStartAngle);
+	    xOuter1 = outsideRadius * (float)Math.cos(toothTopStartAngle);
+	    yOuter1 = outsideRadius * (float)Math.sin(toothTopStartAngle);
+	    xOuter2 = outsideRadius * (float)Math.cos(toothDeclineStartAngle);
+	    yOuter2 = outsideRadius * (float)Math.sin(toothDeclineStartAngle);
+	    xRoot3 = rootRadius * (float)Math.cos(toothValleyStartAngle);
+	    yRoot3 = rootRadius * (float)Math.sin(toothValleyStartAngle);
+	
+	    tempCoordinate1.set(xRoot0, yRoot0, frontZ);
+	    tempCoordinate2.set(xRoot3, yRoot3, frontZ);
+	    tempVector1.sub(tempCoordinate2, tempCoordinate1);
+
+	    tempCoordinate2.set(xOuter1, yOuter1, toothTipFrontZ);
+	    tempVector2.sub(tempCoordinate2, tempCoordinate1);
+
+	    frontToothNormal.cross(tempVector1, tempVector2);
+	    frontToothNormal.normalize();
+
+	    coordinate.set(xOuter1, yOuter1, toothTipFrontZ);
+	    frontGearTeeth.setCoordinate(index, coordinate);
+	    frontGearTeeth.setNormal(index, frontToothNormal);
+
+	    coordinate.set(xRoot0, yRoot0, frontZ);
+	    frontGearTeeth.setCoordinate(index + 1, coordinate);
+	    frontGearTeeth.setNormal(index + 1, frontToothNormal);
+
+	    coordinate.set(xOuter2, yOuter2, toothTipFrontZ);
+	    frontGearTeeth.setCoordinate(index + 2, coordinate);
+	    frontGearTeeth.setNormal(index + 2, frontToothNormal);
+
+	    coordinate.set(xRoot3, yRoot3, frontZ);
+	    frontGearTeeth.setCoordinate(index + 3, coordinate);
+	    frontGearTeeth.setNormal(index + 3, frontToothNormal);
+	}
+	newShape = new Shape3D(frontGearTeeth, look);
+	this.addChild(newShape);
+
+	/* Construct the gear's rear facing teeth facets (Using Quads)
+	 *	   1______2
+	 *         /      \
+	 *        /        \
+	 *       /          \
+	 *      /____________\
+	 *     0              3
+	 */
+	toothFacetVertexCount = 4;
+	toothFaceTotalVertexCount = toothFacetVertexCount * toothCount;
+
+	QuadArray rearGearTeeth
+	    = new QuadArray(toothCount * toothFacetVertexCount,
+			    GeometryArray.COORDINATES
+			    | GeometryArray.NORMALS);
+
+	for(int count = 0; count < toothCount; count++) {
+
+	    index = count * toothFacetVertexCount;
+	    toothStartAngle =
+		gearStartAngle + circularPitchAngle * (double)count;
+	    toothTopStartAngle = toothStartAngle + toothTopAngleIncrement;
+	    toothDeclineStartAngle
+		= toothStartAngle + toothDeclineAngleIncrement;
+	    toothValleyStartAngle = toothStartAngle + toothValleyAngleIncrement;
+	    
+	    xRoot0 = rootRadius * (float)Math.cos(toothStartAngle);
+	    yRoot0 = rootRadius * (float)Math.sin(toothStartAngle);
+	    xOuter1 = outsideRadius * (float)Math.cos(toothTopStartAngle);
+	    yOuter1 = outsideRadius * (float)Math.sin(toothTopStartAngle);
+	    xOuter2 = outsideRadius * (float)Math.cos(toothDeclineStartAngle);
+	    yOuter2 = outsideRadius * (float)Math.sin(toothDeclineStartAngle);
+	    xRoot3 = rootRadius * (float)Math.cos(toothValleyStartAngle);
+	    yRoot3 = rootRadius * (float)Math.sin(toothValleyStartAngle);
+
+	    tempCoordinate1.set(xRoot0, yRoot0, rearZ);
+	    tempCoordinate2.set(xRoot3, yRoot3, rearZ);
+	    tempVector1.sub(tempCoordinate2, tempCoordinate1);
+	    tempCoordinate2.set(xOuter1, yOuter1, toothTipRearZ);
+	    tempVector2.sub(tempCoordinate2, tempCoordinate1);
+	    rearToothNormal.cross(tempVector2, tempVector1);
+	    rearToothNormal.normalize();
+
+	    coordinate.set(xRoot0, yRoot0, rearZ);
+	    rearGearTeeth.setCoordinate(index, coordinate);
+	    rearGearTeeth.setNormal(index, rearToothNormal);
+
+	    coordinate.set(xOuter1, yOuter1, toothTipRearZ);
+	    rearGearTeeth.setCoordinate(index + 1, coordinate);
+	    rearGearTeeth.setNormal(index + 1, rearToothNormal);
+
+	    coordinate.set(xOuter2, yOuter2, toothTipRearZ);
+	    rearGearTeeth.setCoordinate(index + 2, coordinate);
+	    rearGearTeeth.setNormal(index + 2, rearToothNormal);
+
+	    coordinate.set(xRoot3, yRoot3, rearZ);
+	    rearGearTeeth.setCoordinate(index + 3, coordinate);
+	    rearGearTeeth.setNormal(index + 3, rearToothNormal);
+
+	}
+	newShape = new Shape3D(rearGearTeeth, look);
+	this.addChild(newShape);
+
+	/*
+	 * Construct the gear's top teeth faces   (As seen from above)
+	 *    Root0    Outer1    Outer2    Root3    Root4 (RearZ)
+	 *	0_______3 2_______5 4_______7 6_______9
+	 *      |0     3| |4     7| |8    11| |12   15|
+	 *      |       | |       | |       | |       |
+	 *      |       | |       | |       | |       |
+	 *      |1_____2| |5_____6| |9____10| |13___14|
+	 *      1       2 3       4 5       6 7       8
+	 *    Root0    Outer1    Outer2    Root3    Root4 (FrontZ)
+	 *
+	 * Quad 0123 uses a left normal
+	 * Quad 2345 uses an out normal
+	 * Quad 4567 uses a right normal
+	 * Quad 6789 uses an out normal
+	 */
+	topVertexCount = 8 * toothCount + 2;
+	topStripCount[0] = topVertexCount;
+
+	toothFacetVertexCount = 4;
+	toothFacetCount = 4;
+
+	QuadArray topGearTeeth
+	    = new QuadArray(toothCount * toothFacetVertexCount
+			    * toothFacetCount,
+			    GeometryArray.COORDINATES
+			    | GeometryArray.NORMALS);
+
+	for(int count = 0; count < toothCount; count++) {
+	    index = count * toothFacetCount * toothFacetVertexCount;
+	    toothStartAngle = gearStartAngle +
+		circularPitchAngle * (double)count;
+	    toothTopStartAngle = toothStartAngle + toothTopAngleIncrement;
+	    toothDeclineStartAngle
+		= toothStartAngle + toothDeclineAngleIncrement;
+	    toothValleyStartAngle
+		= toothStartAngle + toothValleyAngleIncrement;
+	    nextToothStartAngle = toothStartAngle + circularPitchAngle;
+
+	    xRoot0 = rootRadius * (float)Math.cos(toothStartAngle);
+	    yRoot0 = rootRadius * (float)Math.sin(toothStartAngle);
+	    xOuter1 = outsideRadius * (float)Math.cos(toothTopStartAngle);
+	    yOuter1 = outsideRadius * (float)Math.sin(toothTopStartAngle);
+	    xOuter2 = outsideRadius * (float)Math.cos(toothDeclineStartAngle);
+	    yOuter2 = outsideRadius * (float)Math.sin(toothDeclineStartAngle);
+	    xRoot3 = rootRadius * (float)Math.cos(toothValleyStartAngle);
+	    yRoot3 = rootRadius * (float)Math.sin(toothValleyStartAngle);
+	    xRoot4 = rootRadius * (float)Math.cos(nextToothStartAngle);
+	    yRoot4 = rootRadius * (float)Math.sin(nextToothStartAngle);
+
+	    // Compute normal for quad 1
+	    tempCoordinate1.set(xRoot0, yRoot0, frontZ);
+	    tempCoordinate2.set(xOuter1, yOuter1, toothTipFrontZ);
+	    tempVector1.sub(tempCoordinate2, tempCoordinate1);
+	    leftNormal.cross(frontNormal, tempVector1);
+	    leftNormal.normalize();
+	    
+	    // Coordinate labeled 0 in the quad
+	    coordinate.set(xRoot0, yRoot0, rearZ);
+	    topGearTeeth.setCoordinate(index, coordinate);
+	    topGearTeeth.setNormal(index, leftNormal);
+
+	    // Coordinate labeled 1 in the quad
+	    coordinate.set(tempCoordinate1);
+	    topGearTeeth.setCoordinate(index + 1, coordinate);
+	    topGearTeeth.setNormal(index + 1, leftNormal);
+
+	    // Coordinate labeled 2 in the quad
+	    topGearTeeth.setCoordinate(index + 2, tempCoordinate2);
+	    topGearTeeth.setNormal(index + 2, leftNormal);
+	    topGearTeeth.setCoordinate(index + 5, tempCoordinate2);
+
+	    // Coordinate labeled 3 in the quad
+	    coordinate.set(xOuter1, yOuter1, toothTipRearZ);
+	    topGearTeeth.setCoordinate(index + 3, coordinate);
+	    topGearTeeth.setNormal(index + 3, leftNormal);
+	    topGearTeeth.setCoordinate(index + 4, coordinate);
+
+	    // Compute normal for quad 2
+	    tempCoordinate1.set(xOuter1, yOuter1, toothTipFrontZ);
+	    tempCoordinate2.set(xOuter2, yOuter2, toothTipFrontZ);
+	    tempVector1.sub(tempCoordinate2, tempCoordinate1);
+	    outNormal.cross(frontNormal, tempVector1);
+	    outNormal.normalize();
+
+	    topGearTeeth.setNormal(index + 4, outNormal);
+	    topGearTeeth.setNormal(index + 5, outNormal);
+
+	    // Coordinate labeled 4 in the quad
+	    topGearTeeth.setCoordinate(index + 6, tempCoordinate2);
+	    topGearTeeth.setNormal(index + 6, outNormal);
+	    topGearTeeth.setCoordinate(index + 9, tempCoordinate2);
+
+	    // Coordinate labeled 5 in the quad
+	    coordinate.set(xOuter2, yOuter2, toothTipRearZ);
+	    topGearTeeth.setCoordinate(index + 7, coordinate);
+	    topGearTeeth.setNormal(index + 7, outNormal);
+	    topGearTeeth.setCoordinate(index + 8, coordinate);
+
+	    // Compute normal for quad 3
+	    tempCoordinate1.set(xOuter2, yOuter2, toothTipFrontZ);
+	    tempCoordinate2.set(xRoot3, yRoot3, frontZ);
+	    tempVector1.sub(tempCoordinate2, tempCoordinate1);
+	    rightNormal.cross(frontNormal, tempVector1);
+	    rightNormal.normalize();
+
+	    topGearTeeth.setNormal(index + 8, rightNormal);
+	    topGearTeeth.setNormal(index + 9, rightNormal);
+
+	    // Coordinate labeled 7 in the quad
+	    topGearTeeth.setCoordinate(index + 10, tempCoordinate2);
+	    topGearTeeth.setNormal(index + 10, rightNormal);
+	    topGearTeeth.setCoordinate(index + 13, tempCoordinate2);
+	
+	    // Coordinate labeled 6 in the quad
+	    coordinate.set(xRoot3, yRoot3, rearZ);
+	    topGearTeeth.setCoordinate(index + 11, coordinate);
+	    topGearTeeth.setNormal(index + 11, rightNormal);
+	    topGearTeeth.setCoordinate(index + 12, coordinate);
+
+	    // Compute normal for quad 4
+	    tempCoordinate1.set(xRoot3, yRoot3, frontZ);
+	    tempCoordinate2.set(xRoot4, yRoot4, frontZ);
+	    tempVector1.sub(tempCoordinate2, tempCoordinate1);
+	    outNormal.cross(frontNormal, tempVector1);
+	    outNormal.normalize();
+
+	    topGearTeeth.setNormal(index + 12, outNormal);
+	    topGearTeeth.setNormal(index + 13, outNormal);
+
+	    // Coordinate labeled 9 in the quad
+	    topGearTeeth.setCoordinate(index + 14, tempCoordinate2);
+	    topGearTeeth.setNormal(index + 14, outNormal);
+
+	    // Coordinate labeled 8 in the quad
+	    coordinate.set(xRoot4, yRoot4, rearZ);
+	    topGearTeeth.setCoordinate(index + 15, coordinate);
+	    topGearTeeth.setNormal(index + 15, outNormal);
+
+	    // Prepare for the loop by computing the new normal
+	    toothTopStartAngle
+		= nextToothStartAngle + toothTopAngleIncrement;
+	    xOuter1 = outsideRadius * (float)Math.cos(toothTopStartAngle);
+	    yOuter1 = outsideRadius * (float)Math.sin(toothTopStartAngle);
+
+	    tempCoordinate1.set(xRoot4, yRoot4, toothTipFrontZ);
+	    tempCoordinate2.set(xOuter1, yOuter1, toothTipFrontZ);
+	    tempVector1.sub(tempCoordinate2, tempCoordinate1);
+	    leftNormal.cross(frontNormal, tempVector1);
+	    leftNormal.normalize();
+	}
+	newShape = new Shape3D(topGearTeeth, look);
+	this.addChild(newShape);
+    }
+
+}