should iterate_affected_nodes be used ?

[lvZic]

I just want to get each frame's result, should i use iterate_affected_nodes? in my opinion, the easiest way is get tree's all child node's position? is it?

[TheComet]

You can do it either way. This function ignores chains that weren't manipulated by the solver, for example, if you set eff->weight=0.0 on one of the effectors then that whole branch doesn't change.