Possible to avoid PointNet?

[FabianSchuetze]

Hi,

thanks for the wonderful work and the nice repo! So far, both the code and the paper have been a pleasure to read.

Is it possible to avoid using PointNet2 for the initial downsampling (the PointnetSAModuleVotes module)? I have problems compiling the code for pointnet, probably because I'm on a newer cuda version. Even if the performance is not exactly identical (just in case somebody cares, each error pertains to a wrong number of arguments to std::tuple), some workaround might be useful.