Fixes to RunR for the arbitrary grid

[shkodm]

Mostly added getters and setters.

Also fixed a compilation error for the phase field, when compiling with >= c++17 .

Should be noted that for instance for scalar quantities, arbitrary grid returns 1D arrays with respect to the geometry,
whereas cartesian returns 3D arrays. For complex setup one can just use Solver$GEOMETRY$BOUNDARY and
Solver$Geometry$X(or Y, Z) arrays, instead of assuming certain mesh structure.

Tested by:

• Running interactive RunR session for cartesian and arbitrary grid
• Initialising droplet inside a periodic domain using RunR

[llaniewski]

This is good to merge, but I would like the setFlags for completeness.

[llaniewski]

Please add setFlags analogous to getFlags.

[shkodm]

@llaniewski I did not implement it, because this would allow overwriting the Wall markers on nodes. Do we really want it for the arbitrary grid? I think it would the user should not try to do it

[llaniewski]

Yeah, the user can overwrite any flags he wants. Not always will it make sense, but no reason to block it.

…

On Wed, 11 Mar 2026, 7:09 am Dmytro Sashko, ***@***.***> wrote: ***@***.**** commented on this pull request. ------------------------------ In src/ArbLattice.cpp <#543 (comment)>: > std::vector<real_t> ArbLattice::getFieldAdj(const Model::Field& f) { throw std::runtime_error{"UNIMPLEMENTED"}; return {}; }; -void ArbLattice::setFlags(const std::vector<big_flag_t>& x) { throw std::runtime_error{"UNIMPLEMENTED"}; return; }; -void ArbLattice::setField(const Model::Field& f, const std::vector<real_t>& x) { throw std::runtime_error{"UNIMPLEMENTED"}; return; }; +void ArbLattice::setFlags(const std::vector<big_flag_t>& x) { throw std::runtime_error{"NOT SUPPORTED FOR ARB LATTICE"}; return; }; @llaniewski <https://github.com/llaniewski> I did not implement it, because this would allow overwriting the Wall markers on nodes. Do we really want it for the arbitrary grid? I think it would the user should not try to do it — Reply to this email directly, view it on GitHub <#543 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAOLE6CSCKT7PDKRXJI4HBT4QD7JFAVCNFSM6AAAAACWLLDCG2VHI2DSMVQWIX3LMV43YUDVNRWFEZLROVSXG5CSMV3GSZLXHMZTSMRXGE4DGMZUGE> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[shkodm]

@llaniewski the failing check is some github action problems (could not check out the repo). I think this is good to merge

[llaniewski]

I've rerun the action and all checks are good.