mod_fem_viewer/FemViewer/inc/Ray.h

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/*
 * Ray.h
 *
 *  Created on: 28 sty 2014
 *      Author: Paweł Macioł
 */

#ifndef _Ray_h__
#define _Ray_h__

#include "MathHelper.h"
#include <stdint.h> //uint64_t

namespace FemViewer {

using namespace fvmath;

template<typename T>
class IsectInfo
{
  public:
    IsectInfo() {}
    CVec3<T> P, N;
    CVec3<T> dPdu, dPdv;
    T s, t;
    CVec3<T> worldToLocal(const Vec3<T> &v) {
        CVec3<T> sn(dPdu);
        (void)Normalize(sn);
        CVec3<T> tn = N * sn;
        return CVec3<T>(Dot(v, sn), Dot(v, tn), Dot(v, N));
    }
};

template<typename T>
class Ray {
  public:
    bool debug;
    mutable Vec3f color;
    CVec3<T> orig, dir;     
    mutable T tmin, tmax;   
    unsigned triangleId;    
    CVec3<T> invdir;        
    int sign[3];            
    uint64_t id;            
    Ray(Vec3<T> orig, Vec3<T> dir, T near = T(0), T far = std::numeric_limits<T>::max());
    CVec3<T> operator () (const T &t) const { return orig + dir * t; }
};

}// end namespace


#endif /* _Ray_h__ */

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