main.cpp
Film(uint32_t _width, uint32_t _height, Real _width_length = 0.025,
       Real _height_length = 0.025)
      : width(_width),
        height(_height),
        width_length(_width_length),
        height_length(_height_length) {
    pixels = new Vec3[width * height];
  }
// an array contains RGB at each pixel
an array contains RGB at each pixel
an array contains RGB at each pixel
Film(uint32_t _width, uint32_t _height, Real _width_length = 0.025,
       Real _height_length = 0.025)
      : width(_width),
        height(_height),
        width_length(_width_length),
        height_length(_height_length) {
    pixels = new Vec3[width * height];
  }
Film ( uint32_t _width , uint32_t _height , Real _width_length = 0.025 , Real _height_length = 0.025 ) : width ( _width ) , height ( _height ) , width_length ( _width_length ) , height_length ( _height_length ) { pixels = new Vec3 [ width * height ] ; }
an array contains RGB at each pixel
an array contains RGB at each pixel