Spline interior filling?

I would like to make an array of objects based on points and pretensions of the splines.
Could someone give me a direction of the nods to be used for this?

I made an assembly in the image example.
Would you like to do something like this?

Help, please!

You can follow the below tutorials

  1. Advanced Procedural Foliage Spawner I - UE4 Tutorials #327 - YouTube
  2. Advanced Procedural Foliage Spawner II - UE4 Tutorials #328 - YouTube
  3. Advanced Procedural Foliage Spawner III - Points Inside a polygon - UE4 Tutorials #329 - YouTube

This is perfect, thank you !!!