Spring physics-based animations

[neelkarma]

Describe the feature

Adding a new spring keyword, similar to the bezier keyword, that can define physics-based springs and be used in place of bezier curves for animations. Parameters would include stiffness and damping values (optionally mass, although equivalent effects can be achieved by modifying stiffness and damping)

Why would it be beneficial

Mainly because touchpad swipe gestures would feel a lot nicer, since the animation would inherit the swipe velocity rather than abruptly shifting to the bezier curve velocity upon release. Also, an interesting side effect is that the animation can briefly overshoot if you swipe quickly, and not if you swipe slowly, which simply feels amazing in my opinion (kinda similar to how iPhones switch between open apps when swiping along the bottom bar).