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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. */
/******************************************************************/
#include "ray.h"
//////////////////
// Constructors //
//////////////////
ray::ray(const vec3d& origin, const vec3d& direction)
{
_origin = origin;
_direction = normalize(direction);
}
ray::ray(const ray& r)
{
_origin = r._origin;
_direction = r._direction;
}
///////////////
// Operators //
///////////////
ray& ray::operator=(const ray& r)
{
_assign(r);
return *this;
}
vec3d ray::operator()(float t) const
{
return _origin + t*_direction;
}
float ray::operator()(const vec3d& point) const
{
return _direction.dot(point - _origin);
}
//////////////
// Mutators //
//////////////
ray& ray::transform(const transformation3d& t)
{
_origin = t.transformPoint(_origin);
_direction = t.transformDirection(_direction);
return *this;
}
ray& ray::inverseTransform(const transformation3d& t)
{
_origin = t.inverseTransformPoint(_origin);
_direction = t.inverseTransformDirection(_direction);
return *this;
}
/////////////////////
// Private Methods //
/////////////////////
void ray::_swap(ray& r)
{
swap(_origin, r._origin);
swap(_direction, r._direction);
}
void ray::_assign(const ray& r)
{
_origin = r._origin;
_direction = r._direction;
}
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