From dd13032d4bd776f3f2ed4a0858f48a6db634c045 Mon Sep 17 00:00:00 2001
From: Steve <steveb9@u.washington.edu>
Date: Wed, 2 Feb 2011 11:44:40 +0000
Subject: Added package tesseract.tests Added Ellipsoid class to
 tesseract.objects Added EggTest to tesseract.tests

---
 src/tesseract/objects/Ellipsoid.java | 103 +++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/tesseract/objects/Ellipsoid.java

(limited to 'src/tesseract/objects')

diff --git a/src/tesseract/objects/Ellipsoid.java b/src/tesseract/objects/Ellipsoid.java
new file mode 100644
index 0000000..e44d5ea
--- /dev/null
+++ b/src/tesseract/objects/Ellipsoid.java
@@ -0,0 +1,103 @@
+/*
+ * TCSS 491 Computational Worlds
+ * Author Steve Bradshaw
+ */
+package tesseract.objects;
+
+import javax.media.j3d.Appearance;
+import javax.media.j3d.Group;
+import javax.media.j3d.Transform3D;
+import javax.media.j3d.TransformGroup;
+import javax.vecmath.Matrix3f;
+
+import com.sun.j3d.utils.geometry.Sphere;
+
+/**
+ * This class creates an ellipsoid using the formula 
+ * (x/a)^2  +  (y/b)^2  +  (z/c)^2 = 1 using a matrix3f transformation
+ * on a basic Sphere.  This class sets 'a' to a constant 1.0 and allows
+ * 'b' and 'c'  to alter the ellipsoid's shape along with the radius field 
+ * Sphere.  Since this is a sphere, the normals are already calculated.
+ * 
+ * @author Steve Bradshaw
+ * @version 1 Feb 2011
+ */
+public class Ellipsoid extends Sphere {
+	
+	/**
+	 *  The b in the formula (x/a)^2 + (y/b)^2 + (z/c)^2 = 1.
+	 */
+	private float my_b;
+	
+	/**
+	 *  The c in the formula (x/a)^2 + (y/b)^2 + (z/c)^2 = 1.
+	 */
+	private float my_c;
+	
+	/**
+	 *  The Group containing the new ellipsoid.
+	 */
+	private TransformGroup my_ellipsoidTG;
+	
+	/**
+	 * Constructor similar to sphere but with the additions of b and c to change
+	 * the shape.
+	 * This constructor does not have the Appearance as an argument.
+	 * 
+	 * @param radius the radius of the ellipsoid if in sphere form
+	 * @param primflags an int
+	 * @param divisions an int 
+	 * @param b to change the shape of the ellipsoid in the y direction
+	 * @param c to change the shape of the ellipsoid in the z direction
+	 */
+	public Ellipsoid(final float radius, final int primflags,
+			final int divisions, final float b, final float c) {
+		super(radius, primflags, divisions);
+		
+		my_b = b;
+		my_c = c;
+		my_ellipsoidTG = new TransformGroup();
+		createGeometry();
+	}
+	
+	/**
+	 * Constructor similar to sphere but with the additions of b and c to change
+	 * the shape. This constructor adds Appearance as an argument.
+	 * 
+	 * @param radius the radius of the ellipsoid if in sphere form
+	 * @param primflags an int
+	 * @param divisions an int
+	 * @param appearance brings an Appearance object for material, color etc.
+	 * @param b to change the shape of the ellipsoid in the y direction
+	 * @param c to change the shape of the ellipsoid in the z direction
+	 */
+	public Ellipsoid(final float radius, final int primflags,
+			final int divisions, final Appearance appearance,
+			final float b, final float c) {
+		super(radius, primflags, divisions, appearance);
+		
+		my_b = b;
+		my_c = c;
+		my_ellipsoidTG = new TransformGroup();
+		createGeometry();
+	}
+	
+	/*
+	 * This private method transforms a sphere using a 3D Matrix
+	 */
+	private void createGeometry() {
+		Transform3D tmp = new Transform3D();
+		tmp.set(new Matrix3f(1.0f, 0.0f, 0.0f, 0.0f, my_b, 0.0f, 0.0f, 0.0f, my_c));
+		my_ellipsoidTG.setTransform(tmp);
+		my_ellipsoidTG.addChild(this);
+	}
+	
+	/**
+	 * This method is the getter to get custom ellipsoid
+	 * 
+	 * @return Group containing the transformation of the sphere
+	 */
+	public Group getEllipsoid() {
+		return my_ellipsoidTG;
+	}
+}
-- 
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