Crash if preconditioner is set to PcNone in 3d

[alexus37]

I am trying to use the solvePressure function without a Preconditioner (PcNone or 0).

solvePressure(
                    flags=flags,
                    vel=velocity,
                    pressure=pressure,
                    cgAccuracy=1e-6,
                    cgMaxIterFac=6000 / self.opt.res,
                    retRhs=rhs,
                    preconditioner=0,
                )

I think the error is in source/plugin/pressure.cpp#L407. I would make a PR to fix it, but only if this repo is active and someone is going to look at it :D

[sebbas]

Yes, the assert in setICPreconditioner() cannot handle PC_None. This should be fixed in the develop branch first (not on Github) which then could be merged back into this repositories master branch.

[alexus37]

okay, I guess then my hands are tied.

[sebbas]

Bug reports are still welcome! If you already have a patch you could attach it to this report. It could still be committed on your behalf, just not as a Github PR.