Not drawing rain drops

[KIgor86]

Good day! My name is Igor. I'm trying to use your librain plugin from latest commit on master. I placed it in C:\X-Plane 11\Resources\plugins\librain.plugin\win_x64. Shaders are in the following folder C:\X-Plane 11\Resources\plugins\librain.plugin\shaders. Here C:\X-Plane 11\Aircraft\Laminar Research\Cessna 172SP\plugins I added my plugin for initialization of librain. I attached the source code. I use one glass from here C:\X-Plane 11\Aircraft\Laminar Research\Cessna 172SP\objects\glass_out.obj. My Xplane version is 11.55.
But I don't see any drops of rain on the glass. I added some additional debug output to your code and build librain. When I start Xplane I see in Log.txt that functions for drawing are in work. I have no idea what to do :(

Help, please! Thank u in advance!

dllmain_cpp.zip

P.S. And would you be so kind to make new release (build) of your library.

[KIgor86]

May be I use wrong glass?