Ring.h

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#ifndef Ring_h
#define Ring_h

#include "Vector.h"
#include "Primitive.h"
class HitRecord;
class Point;
class RenderContext;

class Ring : public Primitive {
 public:
    Ring(Material* material, const Point &center, const Vector& n, const double r1, const double r2 = 0.0);
    virtual ~Ring();

    virtual void getBounds(BoundingBox& bbox) const;
    virtual void intersect(HitRecord& hit, const RenderContext& context, const Ray& ray) const;
    virtual void normal(Vector& normal, const RenderContext& context,
                        const Point & hitpos, const Ray& ray, const HitRecord& hit) const;

 private:
    Ring(const Ring&);
    Ring& operator=(const Ring&);

    Point center;
    Vector norm;
    double r1Sq;
    double r2Sq;
    double radius1;
    double radius2;

    double d;
};

#endif

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