Broke the grabbing code but added Alden's collision code. Not sure if its working yet since my Mac doesn't like it.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/alden/HalfSpace.java b/src/alden/HalfSpace.java
new file mode 100644
index 0000000..efab5ea
--- /dev/null
+++ b/src/alden/HalfSpace.java
@@ -0,0 +1,28 @@
+package alden;

+import javax.media.j3d.*;

+import javax.vecmath.*;

+

+@SuppressWarnings("restriction")

+public class HalfSpace extends CollidableObject {

+	protected Vector3f normal;

+	// Right-hand side of the plane equation: Ax + By + Cz = D

+	protected float intercept;

+

+	public HalfSpace(Vector3f position, Vector3f normal) {

+		super(Float.POSITIVE_INFINITY);

+		this.position.set(position);

+		this.normal = new Vector3f(normal);

+		this.normal.normalize();

+		intercept = this.normal.dot(position);

+	}

+

+/*	public CollisionInfo calculateCollision(Particle particle) {

+		if (Math.signum(normal.dot(particle.getPosition()) - intercept) == Math.signum(normal.dot(particle.getPreviousPosition()) - intercept))

+			return null;

+		

+		Vector3f projection = new Vector3f();

+		projection.scaleAdd(-1, position, particle.getPosition());

+		float penetration = -projection.dot(normal);

+		return new CollisionInfo(normal, penetration);

+	}*/

+}