Is it possible to spawn particles from a material opacity mask using Material Function nodes ?

Hello, I’m totally new in Niagara and I’m trying to spawn particles by using a material with an opacity mask.
However, I’ve got some Material Function in my material and I can’t figure out how I could put these nodes in my Niagara Module Script (script which will be put in a Niagara Fountain Emitter)
Is it even possible to do this ?

My material opacity mask :

And the result of the opacity mask put on my mesh (it’s supposed to move from left to right) :

Thanks in advance for your reply.