    TempleOS has an advanced algorithm for integrating ordinary differential
    equations suitable for use in video games.  (Not scientific work.)  It also has
    some support for systems of masses and springs, to save you some work.

    See CMathODE and ODEsUpdate for an overview.
    See ODECallDerivative to see what support there is for masses and springs.

    See ::/Demo/Games/Whap.HC, ::/Demo/Games/Rocket.HC, ::/Demo/Games/MassSpring.HC,
    ::/Apps/Span/SpanMain.HC or ::/Apps/X-Caliber/X-Caliber.HC.