message: add some comment notes to ospray_util.h
diff: @@ -83,15 +83,17 @@ OSPRAY_INTERFACE void ospSetVec4f(OSPObject, const char *n, float x, float y, fl
  OSPRAY_INTERFACE void ospSetVec2i(OSPObject, const char *n, int x, int y);
  OSPRAY_INTERFACE void ospSetVec3i(OSPObject, const char *n, int x, int y, int z);
  OSPRAY_INTERFACE void ospSetVec4i(OSPObject, const char *n, int x, int y, int z, int w);
  -// clang-format on
  -OSPRAY_INTERFACE void ospSetObjectAsData(OSPObject,
  +// Take 'obj' and put it in an opaque OSPData array with given element type, then set on 'target'
  +OSPRAY_INTERFACE void ospSetObjectAsData(OSPObject target,
  const char *n,
  OSPDataType type,
  OSPObject obj);
  +// clang-format on
  // Rendering helpers //////////////////////////////////////////////////////////
  +// Start a frame task and immediately wait on it, return frame buffer varaince
  OSPRAY_INTERFACE float ospRenderFrameBlocking(OSPFrameBuffer,
  OSPRenderer,
  OSPCamera,
  