Class AbstractIntersection

java.lang.Object
  Intersection
      AbstractIntersection

public abstract class AbstractIntersection
extends Intersection

Partial implementation of Intersection interface.

Field Summary

Fields inherited from class Intersection

NONE

Constructor Summary

AbstractIntersection(Ray incident, double distance)

Method Summary

double	getDistance() Returns the distance along the ray to the intersection; ie, how many times the direction vector should be added to the point to reach the surface.
Point	getHitPoint() Returns the point on the surface where the ray hit.
Ray	getIncidentRay()
abstract Vector	getNormal() Returns a vector normal to the surface at the point where the ray hit, in the direction of the surface's exterior.

Methods inherited from class Intersection

getMaterial

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractIntersection

public AbstractIntersection(Ray incident,
                            double distance)

Method Detail

getDistance

public double getDistance()

Description copied from class: Intersection

Returns the distance along the ray to the intersection; ie, how many times the direction vector should be added to the point to reach the surface. This number should always be at least 1.0.

Specified by:

getDistance in class Intersection

getIncidentRay

public Ray getIncidentRay()

getHitPoint

public Point getHitPoint()

Description copied from class: Intersection

Returns the point on the surface where the ray hit.

Specified by:

getHitPoint in class Intersection

getNormal

public abstract Vector getNormal()

Description copied from class: Intersection

Returns a vector normal to the surface at the point where the ray hit, in the direction of the surface's exterior.

Specified by:

getNormal in class Intersection