Enhancement: arbitrary theta grid size with numerical equilibria

[Stephen Biggs-Fox]

For numerical equilibria (well, TRANSP and CHEASE at least), the theta grid size is dictated by that of the equilibrium data file; ntheta in the input file is ignored. It would be better if we could set ntheta in the input file and down-sample / interpolate as required.

[David Dickinson]

I think a more general enhancement is to decouple the number of theta grid points used in the geometry calculations and that used in the rest of the code.

[Stephen Biggs-Fox]

Fair enough. I don’t know enough about how geometry works to comment any further on that. This issue is mainly just a placeholder so that someone remembers to do something at some point.

[David Dickinson]

Mostly resolved in 8.1 with introduction of ntheta_geometry input