Create easingpackage.js

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MeowcaTheoRange 2022-08-08 11:51:40 -05:00 committed by GitHub
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export var easings = { // Easings taken from https://easings.net/
linear: (x) => {
return x;
},
easeInSine: (x) => {
return 1 - Math.cos((x * Math.PI) / 2);
},
easeOutSine: (x) => {
return Math.sin((x * Math.PI) / 2);
},
easeInOutSine: (x) => {
return -(Math.cos(Math.PI * x) - 1) / 2;
},
easeInQuad: (x) => {
return x * x;
},
easeOutQuad: (x) => {
return 1 - (1 - x) * (1 - x);
},
easeInOutQuad: (x) => {
return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
},
easeInCubic: (x) => {
return x * x * x;
},
easeOutCubic: (x) => {
return 1 - Math.pow(1 - x, 3);
},
easeInOutCubic: (x) => {
return x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
},
easeInQuart: (x) => {
return x * x * x * x;
},
easeOutQuart: (x) => {
return 1 - Math.pow(1 - x, 4);
},
easeInOutQuart: (x) => {
return x < 0.5 ? 8 * x * x * x * x : 1 - Math.pow(-2 * x + 2, 4) / 2;
},
easeInQuint: (x) => {
return x * x * x * x * x;
},
easeOutQuint: (x) => {
return 1 - Math.pow(1 - x, 5);
},
easeInOutQuint: (x) => {
return x < 0.5 ? 16 * x * x * x * x * x : 1 - Math.pow(-2 * x + 2, 5) / 2;
},
easeInExpo: (x) => {
return x === 0 ? 0 : Math.pow(2, 10 * x - 10);
},
easeOutExpo: (x) => {
return x === 1 ? 1 : 1 - Math.pow(2, -10 * x);
},
easeInOutExpo: (x) => {
return x === 0
? 0
: x === 1
? 1
: x < 0.5 ? Math.pow(2, 20 * x - 10) / 2
: (2 - Math.pow(2, -20 * x + 10)) / 2;
},
easeInCirc: (x) => {
return 1 - Math.sqrt(1 - Math.pow(x, 2));
},
easeOutCirc: (x) => {
return Math.sqrt(1 - Math.pow(x - 1, 2));
},
easeInOutCirc: (x) => {
return x < 0.5
? (1 - Math.sqrt(1 - Math.pow(2 * x, 2))) / 2
: (Math.sqrt(1 - Math.pow(-2 * x + 2, 2)) + 1) / 2;
},
easeInBack: (x) => {
const c1 = 1.70158;
const c3 = c1 + 1;
return c3 * x * x * x - c1 * x * x;
},
easeOutBack: (x) => {
const c1 = 1.70158;
const c3 = c1 + 1;
return 1 + c3 * Math.pow(x - 1, 3) + c1 * Math.pow(x - 1, 2);
},
easeInOutBack: (x) => {
const c1 = 1.70158;
const c2 = c1 * 1.525;
return x < 0.5
? (Math.pow(2 * x, 2) * ((c2 + 1) * 2 * x - c2)) / 2
: (Math.pow(2 * x - 2, 2) * ((c2 + 1) * (x * 2 - 2) + c2) + 2) / 2;
},
easeInBounce: (x) => {
return 1 - easings.easeOutBounce(1 - x);
},
easeOutBounce: (x) => {
const n1 = 7.5625;
const d1 = 2.75;
if (x < 1 / d1) {
return n1 * x * x;
} else if (x < 2 / d1) {
return n1 * (x -= 1.5 / d1) * x + 0.75;
} else if (x < 2.5 / d1) {
return n1 * (x -= 2.25 / d1) * x + 0.9375;
} else {
return n1 * (x -= 2.625 / d1) * x + 0.984375;
}
},
easeInOutBounce: (x) => {
return x < 0.5
? (1 - easings.easeOutBounce(1 - 2 * x)) / 2
: (1 + easings.easeOutBounce(2 * x - 1)) / 2;
}
};