/** Intersection of ray with object in scene
 * (should not compute point and normal here, slow, fix later)
 * @author: Phil Gage
 */
class Intersection {

    /** Intersection count for statistics,
        every object's intersect method must increment this */
//    static long intersectionCount = 0;  //temp, should be per camera?

    Intersection () {
        this.point = new Point ();
        this.normal = new Vector3 ();
        this.incident = new Vector3 ();
    }

    /** Object intersected */
    public AbstractObject obj;

    /** Intersection point on object */
    public Point point; //?

    /** Surface normal at intersection point */
    Vector3 normal; //?

    /** Incident ray direction at intersection point */
    Vector3 incident;

    // (could add ray and distance...?)
    // (could add distances for CSG...?)
//    double far;

    /** Copy fields from another Intersection object */
    void set (Intersection from) {
        obj = from.obj;
        point.set(from.point);
        normal.set(from.normal);
        incident.set(from.incident);
    }

}