Method render_block

tutorials/verify/verify.cpp:5977–6051

    }

    void render_block(size_t i, size_t dn)
    {
      RTCRayQueryContext context;
      rtcInitRayQueryContext(&context);

      RTCIntersectArguments args;
      rtcInitIntersectArguments(&args);
      args.context = &context;
      args.flags = ((ivariant & VARIANT_COHERENT_INCOHERENT_MASK) == VARIANT_COHERENT) ? RTC_RAY_QUERY_FLAG_COHERENT :  RTC_RAY_QUERY_FLAG_INCOHERENT;

      RandomSampler sampler;
      RandomSampler_init(sampler, (int)i);

      switch (imode) 
      {
      case MODE_INTERSECT1: 
      {
        for (size_t j=0; j<dn; j++) {
          RTCRayHit ray; 
          fastMakeRay(ray,zero,sampler);
          switch (ivariant & VARIANT_INTERSECT_OCCLUDED_MASK) {
          case VARIANT_INTERSECT: rtcIntersect1(*scene,&ray,&args); break;
          case VARIANT_OCCLUDED : rtcOccluded1 (*scene,(RTCRay*)&ray,(RTCOccludedArguments*)&args); break;
          }
        }
        break;
      }
      case MODE_INTERSECT4: 
      {
        for (size_t j=0; j<dn; j+=4) {
          RTCRayHit4 ray4;
          for (size_t k=0; k<4; k++) {
            setRay(ray4,k,fastMakeRay(zero,sampler));
          }
          __aligned(16) int valid4[4] = { -1,-1,-1,-1 };
          switch (ivariant & VARIANT_INTERSECT_OCCLUDED_MASK) {
          case VARIANT_INTERSECT: rtcIntersect4(valid4,*scene,&ray4,&args); break;
          case VARIANT_OCCLUDED : rtcOccluded4 (valid4,*scene,(RTCRay4*)&ray4,(RTCOccludedArguments*)&args); break;
          }
        }
        break;
      }
      case MODE_INTERSECT8: 
      {
        for (size_t j=0; j<dn; j+=8) {
          RTCRayHit8 ray8;
          for (size_t k=0; k<8; k++) {
            setRay(ray8,k,fastMakeRay(zero,sampler));
          }
          __aligned(32) int valid8[8] = { -1,-1,-1,-1,-1,-1,-1,-1 };
          switch (ivariant & VARIANT_INTERSECT_OCCLUDED_MASK) {
          case VARIANT_INTERSECT: rtcIntersect8(valid8,*scene,&ray8,&args); break;
          case VARIANT_OCCLUDED : rtcOccluded8 (valid8,*scene,(RTCRay8*)&ray8,(RTCOccludedArguments*)&args); break;
          }
        }
        break;
      }
      case MODE_INTERSECT16: