method
Ease.in_out
Ease.in_out(t) -> fixed
Returns the smooth 3t^2 - 2t^3 S-curve: slow at both ends, fastest in the middle. Use it for a polished there-and-back or point-to-point move that neither jerks off the mark nor slams into the target.
Example
program Demo {
handler Step phase Update {
let a = Math.lerp(0.0, 1.0, Ease.in_out(progress))
}
}