Obtain a raytraced body part for a minecraft entity

BodyPart.java

public enum BodyPart {

    RIGHT_LEG,
    LEFT_LEG,
    HEAD,
    BODY;

    public static BodyPart rayTrace(RayTraceResult result) {
        Entity entity = result.getHitEntity();

        if (entity == null)
            return null;

        Vector hitPosition = result.getHitPosition();
        Vector entityPosition = entity.getLocation().toVector();

        Vector difference = hitPosition.subtract(entityPosition);

        // rotate the difference vector to the entity's rotation
        difference = difference.rotateAroundY(entity.getLocation().getYaw());

        if (difference.getY() < 1) {
            return difference.getX() < 0 ? LEFT_LEG : RIGHT_LEG;
        }

        double height = Math.abs(difference.getY());

        if (height > 1.5) {
            return HEAD;
        }

        // apparently arms are not included in the raytrace
        return BODY;

    }
}