@osbjs/osbjs/dist/Math/Easing.js

a minimalist osu! storyboarding framework

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.easeInOutBounce = exports.easeOutBounce = exports.easeInBounce = exports.easeInOutBack = exports.easeOutBack = exports.easeInBack = exports.easeInOutExpo = exports.easeOutExpo = exports.easeInExpo = exports.easeInOutQuart = exports.easeOutQuart = exports.easeInQuart = exports.easeInOutQuad = exports.easeOutQuad = exports.easeInQuad = exports.easeInOutElastic = exports.easeOutElastic = exports.easeInElastic = exports.easeInOutCirc = exports.easeOutCirc = exports.easeInCirc = exports.easeInOutQuint = exports.easeOutQuint = exports.easeInQuint = exports.easeInOutCubic = exports.easeOutCubic = exports.easeInCubic = exports.easeInOutSine = exports.easeOutSine = exports.easeInSine = void 0;
const PI = Math.PI;
function easeInSine(x) {
    return 1 - Math.cos((x * PI) / 2);
}
exports.easeInSine = easeInSine;
function easeOutSine(x) {
    return Math.sin((x * PI) / 2);
}
exports.easeOutSine = easeOutSine;
function easeInOutSine(x) {
    return -(Math.cos(PI * x) - 1) / 2;
}
exports.easeInOutSine = easeInOutSine;
function easeInCubic(x) {
    return x * x * x;
}
exports.easeInCubic = easeInCubic;
function easeOutCubic(x) {
    return 1 - Math.pow(1 - x, 3);
}
exports.easeOutCubic = easeOutCubic;
function easeInOutCubic(x) {
    return x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
}
exports.easeInOutCubic = easeInOutCubic;
function easeInQuint(x) {
    return x * x * x * x * x;
}
exports.easeInQuint = easeInQuint;
function easeOutQuint(x) {
    return 1 - Math.pow(1 - x, 5);
}
exports.easeOutQuint = easeOutQuint;
function easeInOutQuint(x) {
    return x < 0.5 ? 16 * x * x * x * x * x : 1 - Math.pow(-2 * x + 2, 5) / 2;
}
exports.easeInOutQuint = easeInOutQuint;
function easeInCirc(x) {
    return 1 - Math.sqrt(1 - Math.pow(x, 2));
}
exports.easeInCirc = easeInCirc;
function easeOutCirc(x) {
    return Math.sqrt(1 - Math.pow(x - 1, 2));
}
exports.easeOutCirc = easeOutCirc;
function 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;
}
exports.easeInOutCirc = easeInOutCirc;
function easeInElastic(x) {
    const c4 = (2 * Math.PI) / 3;
    return x === 0 ? 0 : x === 1 ? 1 : -Math.pow(2, 10 * x - 10) * Math.sin((x * 10 - 10.75) * c4);
}
exports.easeInElastic = easeInElastic;
function easeOutElastic(x) {
    const c4 = (2 * Math.PI) / 3;
    return x === 0 ? 0 : x === 1 ? 1 : Math.pow(2, -10 * x) * Math.sin((x * 10 - 0.75) * c4) + 1;
}
exports.easeOutElastic = easeOutElastic;
function easeInOutElastic(x) {
    const c5 = (2 * Math.PI) / 4.5;
    return x === 0
        ? 0
        : x === 1
            ? 1
            : x < 0.5
                ? -(Math.pow(2, 20 * x - 10) * Math.sin((20 * x - 11.125) * c5)) / 2
                : (Math.pow(2, -20 * x + 10) * Math.sin((20 * x - 11.125) * c5)) / 2 + 1;
}
exports.easeInOutElastic = easeInOutElastic;
function easeInQuad(x) {
    return x * x;
}
exports.easeInQuad = easeInQuad;
function easeOutQuad(x) {
    return 1 - (1 - x) * (1 - x);
}
exports.easeOutQuad = easeOutQuad;
function easeInOutQuad(x) {
    return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
}
exports.easeInOutQuad = easeInOutQuad;
function easeInQuart(x) {
    return x * x * x * x;
}
exports.easeInQuart = easeInQuart;
function easeOutQuart(x) {
    return 1 - Math.pow(1 - x, 4);
}
exports.easeOutQuart = easeOutQuart;
function easeInOutQuart(x) {
    return x < 0.5 ? 8 * x * x * x * x : 1 - Math.pow(-2 * x + 2, 4) / 2;
}
exports.easeInOutQuart = easeInOutQuart;
function easeInExpo(x) {
    return x === 0 ? 0 : Math.pow(2, 10 * x - 10);
}
exports.easeInExpo = easeInExpo;
function easeOutExpo(x) {
    return x === 1 ? 1 : 1 - Math.pow(2, -10 * x);
}
exports.easeOutExpo = easeOutExpo;
function 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;
}
exports.easeInOutExpo = easeInOutExpo;
function easeInBack(x) {
    const c1 = 1.70158;
    const c3 = c1 + 1;
    return c3 * x * x * x - c1 * x * x;
}
exports.easeInBack = easeInBack;
function easeOutBack(x) {
    const c1 = 1.70158;
    const c3 = c1 + 1;
    return 1 + c3 * Math.pow(x - 1, 3) + c1 * Math.pow(x - 1, 2);
}
exports.easeOutBack = easeOutBack;
function 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;
}
exports.easeInOutBack = easeInOutBack;
function easeInBounce(x) {
    return 1 - easeOutBounce(1 - x);
}
exports.easeInBounce = easeInBounce;
function 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;
    }
}
exports.easeOutBounce = easeOutBounce;
function easeInOutBounce(x) {
    return x < 0.5 ? (1 - easeOutBounce(1 - 2 * x)) / 2 : (1 + easeOutBounce(2 * x - 1)) / 2;
}
exports.easeInOutBounce = easeInOutBounce;