OK, so here's a question.
I have a particle system that implements RK4 integration. It works
great. However... for each step, it involves computing the force acting
on a particle several times. That's fine if the force is an invariant
function of the particle's position and/or velocity (and possibly time).
But what do you do if the forces acting on a particle depend on the
positions of the other particles? o_O
--
http://blog.orphi.me.uk/
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