UpwindOperator from DiffEqOperators.jl

I have been playing around with DifferentialEquations.jl, mainly for solving reaction diffusion PDE’s. I now wish to add an advection term to my model. For this purpose I discovered DiffEqOperators.jl. UpwindOperator sounds like the class I am looking for. However, I can not figure out what is the directions argument, that should be a BitArray.

@ChrisRackauckas could you enlighten me? :grin:

It needs work before this is automatic and the BCs are fixed. Sorry!

Alright, I will do my small cuisine then ! Thanks :slightly_smiling_face: