bool AABB::rayTest(const float3 &pos, const float3 &tan) const{

   float in = 0.f, out = 1.f;

   for(unsigned char i = 0; i < 3; ++i){

      if(tan[i] == 0){

         if(pos[i] < min[i] || pos[i] > max[i]) return(false);

      }else{

         const float r    = 1.f / tan[i];
         float       minD = (min[i] - pos[i]) * r;
         float       maxD = (max[i] - pos[i]) * r;

         if(minD > maxD) swap(minD, maxD);

         if(minD > in) in = minD;
         if(maxD < out) out = maxD;

         if(in > out) return(false);
      }
   }

   return(true);
}