Function renderPixelDebugShader

tutorials/viewer/viewer_device_debug.cpp:214–318

renders a single pixel with eyelight shading */

/* renders a single pixel with eyelight shading */
Vec3fa renderPixelDebugShader(const DebugShaderData& data, float x, float y, const ISPCCamera& camera, RayStats& stats, const RTCFeatureFlags feature_mask)
{
  /* initialize ray */
  Ray ray;
  ray.org = Vec3ff(camera.xfm.p);
  ray.dir = Vec3ff(normalize(x*camera.xfm.l.vx + y*camera.xfm.l.vy + camera.xfm.l.vz));
  ray.tnear() = 0.0f;
  ray.tfar = inf;
  ray.geomID = RTC_INVALID_GEOMETRY_ID;
  ray.primID = RTC_INVALID_GEOMETRY_ID;
  ray.mask = -1;
  ray.time() = data.debug;

  /* intersect ray with scene */
  int64_t c0 = get_tsc();
  if (data.shader == SHADER_OCCLUSION)
  {
    RTCOccludedArguments args;
    rtcInitOccludedArguments(&args);
    args.feature_mask = feature_mask;
    rtcTraversableOccluded1(data.traversable,RTCRay_(ray),&args);
  }
  else
  {
    RTCIntersectArguments args;
    rtcInitIntersectArguments(&args);
    args.feature_mask = feature_mask;
    rtcTraversableIntersect1(data.traversable,RTCRayHit_(ray),&args);
  }

  int64_t c1 = get_tsc();
  RayStats_addRay(stats);

  /* shade pixel */
  switch (data.shader)
  {
  case SHADER_EYELIGHT:
    if (ray.geomID == RTC_INVALID_GEOMETRY_ID)
      return Vec3fa(0.0f);
    else if (dot(ray.dir,ray.Ng) < 0.0f)
      return Vec3fa(0.0f,abs(dot(ray.dir,normalize(ray.Ng))),0.0f);
    else
      return Vec3fa(abs(dot(ray.dir,normalize(ray.Ng))),0.0f,0.0f);

  case SHADER_OCCLUSION:
    if (ray.tfar >= 0.0f) 
      return Vec3fa(0.0f,0.0f,0.0f);
    else 
      return Vec3fa(1.0f,1.0f,1.0f);

  case SHADER_UV:
    if (ray.geomID == RTC_INVALID_GEOMETRY_ID) return Vec3fa(0.0f,0.0f,0.0f);
    else return Vec3fa(ray.u,ray.v,1.0f-ray.u-ray.v);

  case SHADER_TEXCOORDS:
  case SHADER_TEXCOORDS_GRID:

#if !defined(__SYCL_DEVICE_ONLY__)