popmotion
Version:
The animator's toolbox
38 lines • 1.52 kB
JavaScript
import { createExpoIn, reverseEasing, mirrorEasing, createBackIn, createAnticipate, } from "./utils";
var DEFAULT_OVERSHOOT_STRENGTH = 1.525;
var BOUNCE_FIRST_THRESHOLD = 4.0 / 11.0;
var BOUNCE_SECOND_THRESHOLD = 8.0 / 11.0;
var BOUNCE_THIRD_THRESHOLD = 9.0 / 10.0;
export var linear = function (p) { return p; };
export var easeIn = createExpoIn(2);
export var easeOut = reverseEasing(easeIn);
export var easeInOut = mirrorEasing(easeIn);
export var circIn = function (p) { return 1 - Math.sin(Math.acos(p)); };
export var circOut = reverseEasing(circIn);
export var circInOut = mirrorEasing(circOut);
export var backIn = createBackIn(DEFAULT_OVERSHOOT_STRENGTH);
export var backOut = reverseEasing(backIn);
export var backInOut = mirrorEasing(backIn);
export var anticipate = createAnticipate(DEFAULT_OVERSHOOT_STRENGTH);
var ca = 4356.0 / 361.0;
var cb = 35442.0 / 1805.0;
var cc = 16061.0 / 1805.0;
export var bounceOut = function (p) {
if (p === 1 || p === 0)
return p;
var p2 = p * p;
return p < BOUNCE_FIRST_THRESHOLD
? 7.5625 * p2
: p < BOUNCE_SECOND_THRESHOLD
? 9.075 * p2 - 9.9 * p + 3.4
: p < BOUNCE_THIRD_THRESHOLD
? ca * p2 - cb * p + cc
: 10.8 * p * p - 20.52 * p + 10.72;
};
export var bounceIn = reverseEasing(bounceOut);
export var bounceInOut = function (p) {
return p < 0.5
? 0.5 * (1.0 - bounceOut(1.0 - p * 2.0))
: 0.5 * bounceOut(p * 2.0 - 1.0) + 0.5;
};
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