1 files changed, 55 insertions, 0 deletions
diff --git a/src/tesseract/objects/Circle.java b/src/tesseract/objects/Circle.java
new file mode 100644
index 0000000..3019a2b
--- /dev/null
+++ b/src/tesseract/objects/Circle.java
@@ -0,0 +1,55 @@
+package tesseract.objects;
+import com.sun.j3d.utils.image.*;
+import javax.media.j3d.*;
+import javax.vecmath.*;
+
+public class Circle extends Polygon {
+	public Circle(float radius, Vector3f position, Vector3f normal) {
+		this(1, radius, position, normal);
+	}
+
+	public Circle(float mass, float radius, Vector3f position, Vector3f normal) {
+		super(mass, position, normal);
+		setShape(createShape(radius, 22));
+		if (inverseMass != 0) {
+			inverseInertiaTensor.m00 = 1f / 4 / inverseMass * radius * radius;
+			inverseInertiaTensor.m11 = 2 * inverseInertiaTensor.m00;
+			inverseInertiaTensor.m22 = inverseInertiaTensor.m00;
+			inverseInertiaTensor.invert();
+		}
+		updateTransformGroup();
+	}
+	
+	protected Node createShape(float radius, 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));
+		}
+
+		TextureLoader tl = new TextureLoader("wood.jpg", null);
+		ImageComponent2D image = tl.getImage();
+		int width = image.getWidth();
+		int height = image.getHeight();
+		Texture2D texture = new Texture2D(Texture.MULTI_LEVEL_MIPMAP, Texture.RGB, width, height);
+		
+		int imageLevel = 0;
+		texture.setImage(imageLevel, image);
+		while (width > 1 || height > 1) {
+			imageLevel++;
+			if (width > 1) width /= 2;
+			if (height > 1) height /= 2;
+			texture.setImage(imageLevel, tl.getScaledImage(width, height));
+		}
+		texture.setMagFilter(Texture2D.NICEST);
+		texture.setMinFilter(Texture2D.NICEST);
+
+		Appearance appearance = new Appearance();
+		appearance.setTexture(texture);
+		PolygonAttributes polyAttr = new PolygonAttributes(PolygonAttributes.POLYGON_FILL, PolygonAttributes.CULL_NONE, 0);
+		appearance.setPolygonAttributes(polyAttr);		
+		return new Shape3D(geometry, appearance);
+	}
+}