Hexagon.java

@Override
	public Optional<Vector3> pick(Properties properties, Matrix4 world, Ray ray) {
		// Translate to local space
		Ray localRay = ray.cpy().mul(world.cpy().inv());

		// Result vector and dot product
		Vector3 result = null;
		float resultDot = Float.POSITIVE_INFINITY;

		// Intersect with all planes
		Vector3 potential = new Vector3();
		next: for (Plane a : HEX_SIDES)
			if (Intersector.intersectRayPlane(localRay, a, potential)) {
				// Check if point is in front of another plane, then it is not a
				// valid intersection
				for (Plane b : HEX_SIDES)
					if (a != b && PlaneSide.Front.equals(b.testPoint(potential)))
						continue next;

				//
				float dot = Tools.rayDot(localRay, potential);

				if (dot < resultDot) {
					result = potential.cpy();
					resultDot = dot;
				}
			}

		// If there has been no result, return absent
		if (result == null)
			return Optional.absent();

		return Optional.of(result.mul(world));
	}