source: GTP/trunk/Lib/Vis/Preprocessing/src/SimpleRay.h @ 2116

#ifndef __SIMPLERAY_H__
#define __SIMPLERAY_H__

#include <vector>
using namespace std;
#include "Vector3.h"

namespace GtpVisibilityPreprocessor {

struct SimpleRay
{
  
  Vector3 mOrigin;
  Vector3 mDirection;
  // 6*4 = 24B

  Intersectable *mOriginObject;
  Intersectable *mTerminationObject;
  // 2*4 = 8B

  enum {F_BIDIRECTIONAL = 1};
  unsigned short mFlags;
  unsigned char mType;
  unsigned char mDistribution;
  // 4B

  // generator Id -> relative to the generating distribution!
  int mGeneratorId;
  // 4B

  // TOTAL = 40B


  //float mWeight;
  
  SimpleRay(): mType(Ray::LOCAL_RAY)
  {
  }
  
  SimpleRay(const Vector3 &o,
                        const Vector3 &d,
                        const unsigned char distribution,
                        const float weight,
                        const unsigned char flags = F_BIDIRECTIONAL
                        ):
        mOrigin(o),
        mDirection(d),
        mFlags(flags),
        mType(Ray::LOCAL_RAY),
        mDistribution(distribution)
        //      , mWeight(weight)
  {     
        //      mId = sSimpleRayId++;
  }

  bool IsBidirectional() const { return mFlags & F_BIDIRECTIONAL; }

  void SetBidirectional(const bool b) {
        if (b)
          mFlags |= F_BIDIRECTIONAL;
        else
          mFlags &= ~F_BIDIRECTIONAL;
  }
  
  float GetParam(const int axis) const {
        if (axis < 3)
          return mOrigin[axis];
        else
          return mDirection[axis-3];
  }
  
  Vector3 Extrap(const float t) const {
          return mOrigin + mDirection * t;
  }

  friend ostream &operator<<(ostream &s, const SimpleRay &r)
  {
          return s << "origin=" << r.mOrigin << " dir=" << r.mDirection;
  };
};

class SimpleRayContainer : public vector<SimpleRay>
{
public:
    
  SimpleRayContainer():vector<SimpleRay>() {}
  
#if 0
  void NormalizePdf(float scale = 1.0f) {
        iterator it = begin();
        float sumPdf = 0.0f;
        for (; it != end(); it++)
          sumPdf += (*it).mPdf;
        
        float c = scale/sumPdf;
        
        for (it = begin(); it != end(); it++) {
          (*it).mPdf*=c;
  }
  }
#endif
  
  void AddRay(const SimpleRay &ray) {
        push_back(ray);
  }
};



}

#endif