Physical constraints

[dZh0]

Hey there,

I’m not 100% sure if that is what you are looking for but take a look at this brilliant post by @Everynone:

Make a Ground Rail with Spline

On the most fundamental level: [image] check the inclination of the spline with dot product accumulate this value - that’s the speed use speed to progress through a spline You’ll need to add friction as this preserves energy as perfectly as frame time allows it. And input. And a gazillion other things that makes it a game.