Summary:
We already reimplement the spring computation, we were only using rebound for the tension/friction conversion. Turns out that it is quite small so we can just embed it. I'm doing this as I'm preparing for doing a web version of the feature and I'm trying to minimize the number of dependencies.
https://github.com/facebook/rebound-js/blob/master/rebound.js#L932
Summary:
Animated.spring is not guarantee to stabilize at exactly toValue (determined by restDisplacementThreshold). It is a bit annoying that the last value is not toValue, it makes the logs harder to read and also prevents you from writing code like value === toValue. Instead you need to track it down somewhere else.
Christopher Chedeau
Rui Chen
Spencer Ahrens