Gravitas

Gravitas is a collection of equations for making UI elements move in response to touch gestures.

There are also implementations for Java and JavaScript (which has some interactive examples).

lib.rs:

Gravitas is a collection of equations for making UI elements move in response to touch gestures.

There are also implementations for Java and JavaScript (which has some interactive examples).

Each simulation models a single value and generally has a setup function that takes the initial position and velocity. Normally you would compute these in response to a touch gesture ending. All of the simulations are parametric over time and have been algebraically integrated (rather than using a numerical integration method at runtime). The advantage of algebraic integration is lower CPU overhead, and no odd behavior if frames are dropped.