Function intersectNodeRobust

kernels/bvh/node_intersector1.h:540–554

    template<int N>
      __forceinline size_t intersectNodeRobust(const typename BVHN<N>::AABBNode* node, const TravRay<N,true>& ray, vfloat<N>& dist)
    {
      const vfloat<N> tNearX = (vfloat<N>::load((float*)((const char*)&node->lower_x+ray.nearX)) - ray.org.x) * ray.rdir_near.x;
      const vfloat<N> tNearY = (vfloat<N>::load((float*)((const char*)&node->lower_x+ray.nearY)) - ray.org.y) * ray.rdir_near.y;
      const vfloat<N> tNearZ = (vfloat<N>::load((float*)((const char*)&node->lower_x+ray.nearZ)) - ray.org.z) * ray.rdir_near.z;
      const vfloat<N> tFarX  = (vfloat<N>::load((float*)((const char*)&node->lower_x+ray.farX )) - ray.org.x) * ray.rdir_far.x;
      const vfloat<N> tFarY  = (vfloat<N>::load((float*)((const char*)&node->lower_x+ray.farY )) - ray.org.y) * ray.rdir_far.y;
      const vfloat<N> tFarZ  = (vfloat<N>::load((float*)((const char*)&node->lower_x+ray.farZ )) - ray.org.z) * ray.rdir_far.z;
      const vfloat<N> tNear = max(tNearX,tNearY,tNearZ,ray.tnear);
      const vfloat<N> tFar  = min(tFarX ,tFarY ,tFarZ ,ray.tfar);
      const vbool<N> vmask = tNear <= tFar;
      const size_t mask = movemask(vmask);
      dist = tNear;
      return mask;
    }

    //////////////////////////////////////////////////////////////////////////////////////
    // Fast AABBNodeMB intersection