project: Global illumination pathtracer

Details

A simple pathtracer program, capable of producing renderings of simple bodies. The program computes global illumination, by intersecting scene objects, such as luminaries and solid bodies, with idealised surface properies.

  • last updated: August, 2018
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Screenshots

scene_3smpls.bmp scene_1smpl_dark.bmp scene_30smpls.bmp

src > camera.cpp

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#include "./defines.hpp"
#include "./vec3.hpp"
#include "./camera.hpp"

namespace raytracer{

camera::camera(const vec3& pos, const vec3& upVect, const vec3& lookAt)
{
  this->pos_= pos;
  this->up_vect_= upVect;
  recalc(&pos, &lookAt);
};

void camera::recalc(const vec3* pos, const vec3* lookAt)
{
  if(pos== NULL) return;
  
  pos_= vec3(pos->x, pos->y, pos->z).add(vec3(ACCURACY, 0, ACCURACY));//camera position
  //the accuracy addition insures that the cross product between camdir and Y is non zero
  
  vec3 diff_btw= pos_.add(lookAt->negative());//distance origin-camera

  //camera direction vectors
  this->dir_= diff_btw.negative().normalize();
  this->right_= this->up_vect_.cross(dir_).normalize();//Y is up direction
  this->down_= right_.cross(dir_);
};

}