//package comp557.a5;
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import javax.vecmath.Point3d;
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import javax.vecmath.Vector3d;
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public class Ray
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{
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/** Originating point for the ray */
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public Point3d eyePoint = new Point3d(0, 0, 0);
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/** The direction of the ray */
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public Vector3d viewDirection = new Vector3d(0, 0, -1);
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/**
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* Default constructor. Be careful not to use the ray before
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* setting the eye point and view direction!
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*/
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public Ray()
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{
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// do nothing
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}
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/**
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* Creates a new ray with the given eye point and view direction
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* @param eyePoint
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* @param viewDirection
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*/
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public Ray(Point3d eyePoint, Vector3d viewDirection)
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{
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this.eyePoint.set(eyePoint);
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this.viewDirection.set(viewDirection);
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}
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/**
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* Setup the ray.
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* @param eyePoint
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* @param viewDirection
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*/
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public void set(Point3d eyePoint, Vector3d viewDirection)
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{
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this.eyePoint.set(eyePoint);
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this.viewDirection.set(viewDirection);
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}
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/**
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* Computes the location of a point along the ray using parameter t.
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* @param t
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* @param p
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*/
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public void getPoint(double t, Point3d p) // After the intersection, you will call this method to get the intersection point
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{
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p.scale(t, viewDirection);
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p.add(eyePoint);
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}
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}
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