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Ray.C
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C/C++ Source or Header
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1992-11-17
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1KB
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47 lines
/*
* Ray.C
*
* Copyright (C) 1992, Christoph Streit (streit@iam.unibe.ch)
* University of Berne, Switzerland
* All rights reserved.
*
* This software may be freely copied, modified, and redistributed
* provided that this copyright notice is preserved on all copies.
*
* You may not distribute this software, in whole or in part, as part of
* any commercial product without the express consent of the authors.
*
* There is no warranty or other guarantee of fitness of this software
* for any purpose. It is provided solely "as is".
*
*/
#include "Ray.h"
#include "transform.h"
//___________________________________________________________ Ray
Ray::Ray(const Vector& origin, const Vector& direction)
: orig(origin), dir(direction)
{}
real Ray::transform(const TransMatrix& tmat)
{
orig = orig*tmat;
/*
* apply the transformation to the direction
* (translations has no effect)
*/
dir = vectorTransform(dir, tmat);
/*
* compute the that the ray is stretched due to the transformation
*/
real d = dir.length();
dir.normalize();
return d;
}