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/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527 */
/* without consent of either the College of William & Mary or */
/* Pieter Peers. */
/******************************************************************/
#ifndef _RAY_H_
#define _RAY_H_
#include <ostream>
#include "vec3d.h"
#include "transformation3d.h"
class ray {
public:
//////////////////
// Constructors //
//////////////////
ray(const vec3d& origin = vec3d(), const vec3d& direction = vec3d());
ray(const ray& src);
////////////////
// Inspectors //
////////////////
const vec3d& origin(void) const { return _origin; }
const vec3d& direction(void) const { return _direction; }
///////////////
// Operators //
///////////////
ray& operator=(const ray& r);
vec3d operator()(float t) const;
float operator()(const vec3d& point) const;
//////////////
// Mutators //
//////////////
ray& transform(const transformation3d& t);
ray& inverseTransform(const transformation3d& t);
/////////////
// Friends //
/////////////
friend void swap(ray& a, ray& b) { a._swap(b); }
friend ray transform(const ray& r, const transformation3d& t) { return ray(r).transform(t); }
friend ray inverseTransform(const ray& r, const transformation3d& t) { return ray(r).inverseTransform(t); }
friend std::ostream& operator<<(std::ostream& s, const ray& r)
{
s << r.origin() << "->" << r.direction();
return s;
}
private:
/////////////////////
// Private Methods //
/////////////////////
void _swap(ray& r);
void _assign(const ray& r);
//////////////////
// Data Members //
//////////////////
vec3d _origin;
vec3d _direction;
};
#endif /* _RAY_H_ */
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