Function IntersectWithModeInternal

tutorials/verify/rtcore_helpers.h:701–785

  static const size_t numSceneGeomFlags = 32;

  __noinline void IntersectWithModeInternal(IntersectMode mode, IntersectVariant ivariant, RTCScene scene, RTCRayHit* rays, unsigned int N, RTCIntersectArguments* args)
  {
    RTCIntersectArguments _args;
    if (!args)
    {
      rtcInitIntersectArguments(&_args);
      args = &_args;
    }

    RTCRayQueryFlags flags = ((ivariant & VARIANT_COHERENT_INCOHERENT_MASK) == VARIANT_COHERENT) ? RTC_RAY_QUERY_FLAG_COHERENT :  RTC_RAY_QUERY_FLAG_INCOHERENT;
    args->flags = (RTCRayQueryFlags) (args->flags | flags);
    
    switch (mode) 
    {
    case MODE_INTERSECT_NONE: 
      break;
    case MODE_INTERSECT1:
    {
      switch (ivariant & VARIANT_INTERSECT_OCCLUDED_MASK) {
      case VARIANT_INTERSECT: for (size_t i=0; i<N; i++) rtcIntersect1(scene,&rays[i],args); break;
      case VARIANT_OCCLUDED : for (size_t i=0; i<N; i++) rtcOccluded1 (scene,(RTCRay*)&rays[i],(RTCOccludedArguments*)args); break;
      default: assert(false);
      }
      break;
    }

    case MODE_INTERSECT4: 
    {
      for (size_t i=0; i<N; i+=4) 
      {
        size_t M = min(size_t(4),N-i);
        __aligned(16) int valid[4];
        __aligned(16) RTCRayHit4 ray4;
        for (size_t j=0; j<4; j++) valid[j] = (j<M && rays[i+j].ray.tnear <= rays[i+j].ray.tfar) ? -1 : 0;
        for (size_t j=0; j<M; j++) setRay(ray4,j,rays[i+j]);
        for (size_t j=M; j<4; j++) setRay(ray4,j,makeRay(zero,zero,pos_inf,neg_inf));
        switch (ivariant & VARIANT_INTERSECT_OCCLUDED_MASK) {
        case VARIANT_INTERSECT: rtcIntersect4(valid,scene,&ray4,args); break;
        case VARIANT_OCCLUDED : rtcOccluded4 (valid,scene,(RTCRay4*)&ray4,(RTCOccludedArguments*)args); break;
        default: assert(false);
        }
        for (size_t j=0; j<M; j++) rays[i+j] = getRay(ray4,j);
      }
      break;
    }
    case MODE_INTERSECT8: 
    {
      for (size_t i=0; i<N; i+=8) 
      {
        size_t M = min(size_t(8),N-i);
        __aligned(32) int valid[8];
        __aligned(32) RTCRayHit8 ray8;
        for (size_t j=0; j<8; j++) valid[j] = (j<M && rays[i+j].ray.tnear <= rays[i+j].ray.tfar) ? -1 : 0;
        for (size_t j=0; j<M; j++) setRay(ray8,j,rays[i+j]);
        for (size_t j=M; j<8; j++) setRay(ray8,j,makeRay(zero,zero,pos_inf,neg_inf));
        switch (ivariant & VARIANT_INTERSECT_OCCLUDED_MASK) {
        case VARIANT_INTERSECT: rtcIntersect8(valid,scene,&ray8,args); break;
        case VARIANT_OCCLUDED : rtcOccluded8 (valid,scene,(RTCRay8*)&ray8,(RTCOccludedArguments*)args); break;