From d79a1c6abbf5ce378208dd1fb7ed594ca64c595c Mon Sep 17 00:00:00 2001
From: Phillip <pacardon@u.washington.edu>
Date: Wed, 9 Mar 2011 00:01:30 +0000
Subject:

---
 src/tesseract/objects/Cannon.java | 74 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 src/tesseract/objects/Cannon.java

diff --git a/src/tesseract/objects/Cannon.java b/src/tesseract/objects/Cannon.java
new file mode 100644
index 0000000..c1ddce6
--- /dev/null
+++ b/src/tesseract/objects/Cannon.java
@@ -0,0 +1,74 @@
+package tesseract.objects;
+
+import javax.media.j3d.IndexedQuadArray;
+import javax.media.j3d.PointArray;
+import javax.media.j3d.Transform3D;
+import javax.vecmath.Point3f;
+import javax.vecmath.Vector3f;
+
+public class Cannon extends PhysicalObject{
+
+	public Cannon(Vector3f thePosition, float mass) {
+		super(thePosition, mass);
+		// TODO Auto-generated constructor stub
+		buildShape(14, 7f, 2f, 2f);
+	}
+	
+	private void buildShape(final int theDivisions, final float length,
+			final float breechRadius, final float gunThickness) {
+		Point3f[] coordinates = new Point3f[theDivisions * 4];
+		final float barrelRadius = breechRadius + gunThickness;
+		final float arcAngle = (float) (Math.PI * 2.0);
+		final float gunDivAngle = 2 * (float) Math.PI / theDivisions;
+		Transform3D center = new Transform3D();
+		
+		for (int i = 0; i < theDivisions; i++) {
+			coordinates[i] = new Point3f(breechRadius
+					* (float) Math.cos(i * gunDivAngle), 0f, breechRadius 
+					* (float) Math.sin(i * gunDivAngle));
+		}
+		
+		for (int i = theDivisions; i < theDivisions * 2; i++) {
+			coordinates[i] = new Point3f(breechRadius
+					* (float) Math.cos(i * gunDivAngle), length, breechRadius 
+					* (float) Math.sin(i * gunDivAngle));
+		}
+		
+		for (int i = theDivisions * 2; i < theDivisions * 3; i++) {
+			coordinates[i] = new Point3f(barrelRadius
+					* (float) Math.cos(i * gunDivAngle), 0f, barrelRadius 
+					* (float) Math.sin(i * gunDivAngle));
+		}
+		
+		for (int i = theDivisions * 3; i < theDivisions * 4; i++) {
+			coordinates[i] = new Point3f(barrelRadius
+					* (float) Math.cos(i * gunDivAngle), length, barrelRadius 
+					* (float) Math.sin(i * gunDivAngle));
+		}
+		
+		IndexedQuadArray geometry = new IndexedQuadArray(theDivisions * 4, PointArray.COORDINATES, 
+				theDivisions * 4);
+		int topInsideStop = 0;
+		int index = 0;
+		for (int i = 0; i < theDivisions; i++) {
+			geometry.setCoordinate(index++, coordinates[i]);
+			geometry.setCoordinate(index++, coordinates[(theDivisions + i) % (2 * theDivisions)]);
+			geometry.setCoordinate(index++, coordinates[(theDivisions + i + 1) % (2 * theDivisions)]);
+			geometry.setCoordinate(index++, coordinates[(i + 1) % theDivisions]);
+		}
+		
+		for (int i = theDivisions * 2; i < theDivisions * 3; i++) {
+			geometry.setCoordinate(index++, coordinates[i]);
+			geometry.setCoordinate(index++, coordinates[(theDivisions + i) % (4 * theDivisions)]);
+			geometry.setCoordinate(index++, coordinates[(theDivisions + i + 1) % (4 * theDivisions)]);
+			geometry.setCoordinate(index++, coordinates[((i + 1) % theDivisions) + theDivisions * 2]);
+		}
+		
+		for (int i = 0; i < theDivisions; i++) {
+			geometry.setCoordinate(index++, coordinates[i]);
+			geometry.setCoordinate(index++, coordinates[i + 3 * theDivisions]);
+			geometry.setCoordinate(index++, coordinates[(1 + i + 3 * theDivisions) % theDivisions]);
+			geometry.setCoordinate(index++, coordinates[(i + 1) % theDivisions]);
+		}
+	}
+}
-- 
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