From ce4cfb6670eaba20e27f8c5f499980be59bf0853 Mon Sep 17 00:00:00 2001
From: Steve <steveb9@u.washington.edu>
Date: Tue, 15 Mar 2011 22:16:17 +0000
Subject: Added blimp model Remove gravity for the blimp in World line 224

---
 src/tesseract/objects/blimp/BlimpFin.java | 111 ++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 src/tesseract/objects/blimp/BlimpFin.java

(limited to 'src/tesseract/objects/blimp/BlimpFin.java')

diff --git a/src/tesseract/objects/blimp/BlimpFin.java b/src/tesseract/objects/blimp/BlimpFin.java
new file mode 100644
index 0000000..f5883cd
--- /dev/null
+++ b/src/tesseract/objects/blimp/BlimpFin.java
@@ -0,0 +1,111 @@
+package tesseract.objects.blimp;
+
+/*
+ * Class PlanarPolygon
+ * TCSS 491 Computational Worlds
+ * Steve Bradshaw
+ */
+
+
+import javax.media.j3d.Appearance;
+import javax.media.j3d.Geometry;
+import javax.media.j3d.ImageComponent2D;
+import javax.media.j3d.Material;
+import javax.media.j3d.Node;
+import javax.media.j3d.PolygonAttributes;
+import javax.media.j3d.Shape3D;
+import javax.media.j3d.Texture;
+import javax.media.j3d.Texture2D;
+import javax.media.j3d.Transform3D;
+import javax.media.j3d.TransformGroup;
+import javax.media.j3d.TriangleFanArray;
+import javax.vecmath.Color3f;
+import javax.vecmath.Point3f;
+import javax.vecmath.TexCoord2f;
+import javax.vecmath.Vector3f;
+
+import tesseract.objects.PhysicalObject;
+
+import com.sun.j3d.utils.geometry.GeometryInfo;
+import com.sun.j3d.utils.geometry.NormalGenerator;
+import com.sun.j3d.utils.image.TextureLoader;
+
+/**
+ * This class creates an planar polygon using Mathew Aldens design
+ * of a circle, but this adds lava texture and lower divisions
+ * 
+ * @author Steve Bradshaw & Mathew Alden
+ * @version 8 Feb 2011
+ */
+public class BlimpFin extends PhysicalObject {
+	
+	/**
+	 * Number of divisions in the sphere.
+	 */
+	public static final int DEFAULT_DIVISIONS = 4;
+	
+	/**
+	 * The appearance of this fin
+	 */
+	private Appearance my_appearance;
+	
+	/**
+	 * Create a new Ellipsoid.
+	 * 
+	 * @param position Initial position.
+	 * @param mass Initial mass.
+	 * @param radius the radius of the base sphere.
+	 * @param divisions an in for the shape divisions.
+	 */
+	public BlimpFin( final float mass, final Vector3f position,
+			final float radius, final Appearance appearance) {
+		super(position, mass);
+		
+		my_appearance = appearance;
+		
+		setShape(createShape(radius, DEFAULT_DIVISIONS));
+		
+		if (inverseMass != 0) {
+			inverseInertiaTensor.m00 = 1f / 4 / inverseMass * radius * radius;
+			inverseInertiaTensor.m11 = 2 * inverseInertiaTensor.m00;
+			inverseInertiaTensor.m22 = inverseInertiaTensor.m00;
+			inverseInertiaTensor.invert();
+		}
+		updateTransformGroup();
+	}
+
+	/**
+	 * This method creates a planar polygon shape with lava texture.
+	 * 
+	 * @param radius a float for the size of the base polygon.
+	 * @param divisions an int for the number of divisons.
+	 * @param appearance an Appearance object.
+	 * @return Node a polygon.
+	 */
+	private Node createShape(final float radius, final int divisions) {
+		TriangleFanArray geometry = new TriangleFanArray(divisions,
+				TriangleFanArray.COORDINATES | TriangleFanArray.TEXTURE_COORDINATE_2, new int[] {divisions});
+		for (int i = 0; i < divisions; i++) {
+			float baseX = (float)Math.cos(2 * Math.PI * i / divisions);
+			float baseZ = -(float)Math.sin(2 * Math.PI * i / divisions);
+			geometry.setCoordinate(i, new Point3f(radius * baseX, 0, radius * baseZ));
+			geometry.setTextureCoordinate(0, i, new TexCoord2f((baseX + 1) / 2, (-baseZ + 1) / 2));
+		}
+
+		GeometryInfo gInfo = new GeometryInfo(geometry);
+		new NormalGenerator().generateNormals(gInfo);
+		gInfo.convertToIndexedTriangles();
+		Shape3D fin = new Shape3D(gInfo.getGeometryArray());
+
+		PolygonAttributes polyAttr = new PolygonAttributes(PolygonAttributes.POLYGON_FILL, PolygonAttributes.CULL_NONE, 0);
+		my_appearance.setPolygonAttributes(polyAttr);		
+		geometry.setCapability(Geometry.ALLOW_INTERSECT);
+		fin =  new Shape3D(geometry, my_appearance);
+		Transform3D rotate = new Transform3D();
+		rotate.rotY(Math.PI / 4);
+		TransformGroup tg = new TransformGroup(rotate);
+		tg.addChild(fin);
+		return tg;
+	}
+}
+
-- 
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