Method accels_build

kernels/common/acceln.cpp:152–193

  }
  
  void AccelN::accels_build () 
  {
    /* reduce memory consumption */
    accels.shrink_to_fit();
    
    /* build all acceleration structures in parallel */
    parallel_for (accels.size(), [&] (size_t i) { 
        accels[i]->build();
      });

    /* create list of non-empty acceleration structures */
    bool valid1 = true;
    bool valid4 = true;
    bool valid8 = true;
    bool valid16 = true;
    for (size_t i=0; i<accels.size(); i++) {
      valid1 &= (bool) accels[i]->intersectors.intersector1;
      valid4 &= (bool) accels[i]->intersectors.intersector4;
      valid8 &= (bool) accels[i]->intersectors.intersector8;
      valid16 &= (bool) accels[i]->intersectors.intersector16;
    }

    if (accels.size() == 1) {
      type = accels[0]->type; // FIXME: should just assign entire Accel
      bounds = accels[0]->bounds;
      intersectors = accels[0]->intersectors;
    }
    else 
    {
      type = AccelData::TY_ACCELN;
      intersectors.ptr = this;
      intersectors.intersector1  = Intersector1(&intersect,&occluded,&pointQuery,valid1 ? "AccelN::intersector1": nullptr);
      intersectors.intersector4  = Intersector4(&intersect4,&occluded4,valid4 ? "AccelN::intersector4" : nullptr);
      intersectors.intersector8  = Intersector8(&intersect8,&occluded8,valid8 ? "AccelN::intersector8" : nullptr);
      intersectors.intersector16 = Intersector16(&intersect16,&occluded16,valid16 ? "AccelN::intersector16": nullptr);

      /*! calculate bounds */
      bounds = empty;
      for (size_t i=0; i<accels.size(); i++) 
        bounds.extend(accels[i]->bounds);
    }
  }

  void AccelN::accels_select(bool filter)
  {