Best practice for controllers slowing down/speeding up along the spline

[_Aka_]

Hi
I see few ways of doing it:

1. The one you suggested, using custom events: These events are implemented using regular Unity. I can't try it for now yo be sure (I am on vacation), but try making a public method that takes an AnimationCurve, and see if the event can call it)
   
2. Automatic speed variation based on the tangent variation: Change the speed of the controller based on the curvature of the track. You can compute it by computing the delta between the spline tangent at a specific point vs at a point slightly before.
   
3. Using MetaData. Scene 01_MetaData shows how a controller has a height variation using meta data. You can do something similar to modify the speed.
   I hope this helped. Have a nice day