38 lines
653 B
JavaScript
38 lines
653 B
JavaScript
var overshoot = 1.70158;
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export var backIn = (function custom(s) {
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s = +s;
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function backIn(t) {
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return t * t * ((s + 1) * t - s);
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}
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backIn.overshoot = custom;
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return backIn;
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})(overshoot);
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export var backOut = (function custom(s) {
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s = +s;
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function backOut(t) {
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return --t * t * ((s + 1) * t + s) + 1;
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}
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backOut.overshoot = custom;
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return backOut;
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})(overshoot);
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export var backInOut = (function custom(s) {
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s = +s;
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function backInOut(t) {
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return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
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}
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backInOut.overshoot = custom;
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return backInOut;
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})(overshoot);
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