{"action":"opened","issue":{"url":"https://api.github.com/repos/jacobwilliams/Fortran-Astrodynamics-Toolkit/issues/7","repository_url":"https://api.github.com/repos/jacobwilliams/Fortran-Astrodynamics-Toolkit","labels_url":"https://api.github.com/repos/jacobwilliams/Fortran-Astrodynamics-Toolkit/issues/7/labels{/name}","comments_url":"https://api.github.com/repos/jacobwilliams/Fortran-Astrodynamics-Toolkit/issues/7/comments","events_url":"https://api.github.com/repos/jacobwilliams/Fortran-Astrodynamics-Toolkit/issues/7/events","html_url":"https://github.com/jacobwilliams/Fortran-Astrodynamics-Toolkit/issues/7","id":184470156,"number":7,"title":"Recommendation - ODE solvers moved to a separate package/module/class","user":{"login":"cbcoutinho","id":12901868,"avatar_url":"https://avatars.githubusercontent.com/u/12901868?v=3","gravatar_id":"","url":"https://api.github.com/users/cbcoutinho","html_url":"https://github.com/cbcoutinho","followers_url":"https://api.github.com/users/cbcoutinho/followers","following_url":"https://api.github.com/users/cbcoutinho/following{/other_user}","gists_url":"https://api.github.com/users/cbcoutinho/gists{/gist_id}","starred_url":"https://api.github.com/users/cbcoutinho/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cbcoutinho/subscriptions","organizations_url":"https://api.github.com/users/cbcoutinho/orgs","repos_url":"https://api.github.com/users/cbcoutinho/repos","events_url":"https://api.github.com/users/cbcoutinho/events{/privacy}","received_events_url":"https://api.github.com/users/cbcoutinho/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-10-21T12:08:29Z","updated_at":"2016-10-21T12:08:29Z","closed_at":null,"body":"Howdy @jacobwilliams,\r\n\r\nI'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.\r\n\r\nYou'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.\r\n\r\nAfter 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:\r\n\r\nCodes available from FSU (John Burkardt):\r\nhttps://people.sc.fsu.edu/~jburkardt/f_src/rkf45/rkf45.html\r\n\r\nODEPACK available from netlib:\r\nhttp://www.netlib.org/odepack/\r\n\r\nWhat do you think? Is there something tailored for modern fortran that meets this demand that I may have missed?"}}
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