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jacobwilliams / Fortran-Astrodynamics-Toolkit

A Modern Fortran Library for Astrodynamics 🚀
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Recommendation - ODE solvers moved to a separate package/module/class #7

Closed cbcoutinho closed 8 years ago

cbcoutinho commented 8 years ago

Howdy @jacobwilliams,

I'm really learning a lot from how you design your Fortran projects, and thinking about porting my projects to be more inline with this modern modular Fortran approach to programming.

You've done a bunch of work on including ode solvers into your code - I think this could be hugely beneficial to others that need an ode solver, but don't necessarily want to clone your astrodynamics toolkit to use them.

After a quick search, the only open-source options I know of that are currently available are either older (77 and/or 90), or are for teaching purposes and don't have the kind of safeguards in place for rigorous use - I am probably missing some great libraries, but the two I found that are otherwise de facto standards are:

Codes available from FSU (John Burkardt): https://people.sc.fsu.edu/~jburkardt/f_src/rkf45/rkf45.html

ODEPACK available from netlib: http://www.netlib.org/odepack/

What do you think? Is there something tailored for modern fortran that meets this demand that I may have missed?

cbcoutinho commented 8 years ago

A bit more of searching came up with Fortran-FOSS-Programmers/FOODIE - it looks like they are trying to work on exactly what I'm looking for.

You can close this issue if you want

szaghi commented 8 years ago

@cbcoutinho Dear Chris, FOODIE adopts an Abstract Calculus Pattern while the Jacob approach is more concrete. Depending on your needs, one approach could be more suited than the other. I like to suggest you to study both, in particular I find very helpful study the code of Jacob, and then give a try to the one you feel is more suited for you. At the end, If you need help to modularize the Jacob's solvers we can try to help.

Do you like to join our Fortran FOSS group here on github? You are more than welcome.

My best regards.

jacobwilliams commented 8 years ago

Note: There's also DDEABM and DOP853 which are separate projects.