Function single_pass

tutorials/next_hit/next_hit_device.cpp:146–195

gathers hits in a single pass */

/* gathers hits in a single pass */
void single_pass(const TutorialData& data, const Ray& ray_i, HitList& hits_o, RandomSampler& sampler, RayStats& stats, const RTCFeatureFlags feature_mask)
{
  /* trace ray to gather all hits */
  Ray ray = ray_i;
  RayQueryContext context(data,hits_o);
  rtcInitRayQueryContext(&context.context);
  RTCIntersectArguments args;
  rtcInitIntersectArguments(&args);
  args.context = &context.context;
  args.filter = gather_all_hits;
  args.feature_mask = feature_mask;
  args.flags = RTC_RAY_QUERY_FLAG_INVOKE_ARGUMENT_FILTER; // invoke filter for each geometry
  rtcTraversableIntersect1(data.traversable,RTCRayHit_(ray),&args);
  RayStats_addRay(stats);

  /* sort hits by extended order */
  //std::sort(&context.hits.hits[context.hits.begin],&context.hits.hits[context.hits.end]);
  insertionsort_ascending(&context.hits.hits[context.hits.begin], context.hits.size());

  /* ignore duplicated hits that can occur for tessellated primitives */
  if (hits_o.size())
  {
    unsigned int i=0, j=1;
    for (; j<hits_o.size(); j++) {
      if (hits_o.hits[i] == hits_o.hits[j]) continue;
      hits_o.hits[++i] = hits_o.hits[j];
    }
    hits_o.end = i+1;
  }

  /* drop hits in case we found too many */
  hits_o.end = std::min(hits_o.end, data.max_total_hits);

  /* shade all hits */
  if (data.enable_opacity)
  {
    for (unsigned int i=context.hits.begin; i<context.hits.end; i++)
    {
      /* roussion roulette ray termination */
      bool opaque = context.hits.hits[i].opaque;
      if (RandomSampler_get1D(sampler) < data.curve_opacity)
	opaque = true;
      
      if (opaque) {
	hits_o.end = i+1;
	return;
      }
    }
  }
}

/* Filter callback function that gathers first N hits up to the first opaque surface */
RTC_SYCL_INDIRECTLY_CALLABLE void gather_next_hits(const RTCFilterFunctionNArguments* args)