Math.js

var PI = Math.PI; export { PI }; export var TAU = PI * 2; export var bin = function bin(value) { "worklet"; return value ? 1 : 0; }; export var mix = function mix(value, x, y) { "worklet"; return x * (1 - value) + y * value; }; export var approximates = function approximates(value, target) { "worklet"; var epsilon = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0.001; return Math.abs(value - target) < epsilon; }; export var normalizeRad = function normalizeRad(value) { "worklet"; var rest = value % TAU; return rest > 0 ? rest : TAU + rest; }; export var toDeg = function toDeg(rad) { "worklet"; return rad * 180 / Math.PI; }; export var toRad = function toRad(deg) { "worklet"; return deg * Math.PI / 180; }; export var avg = function avg(values) { "worklet"; return values.reduce(function (a, v) { return a + v; }, 0) / values.length; }; export var between = function between(value, lowerBound, upperBound) { "worklet"; var inclusive = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true; if (inclusive) { return value >= lowerBound && value <= upperBound; } return value > lowerBound && value < upperBound; }; export var clamp = function clamp(value, lowerBound, upperBound) { "worklet"; return Math.min(Math.max(lowerBound, value), upperBound); }; export var cubicBezier = function cubicBezier(t, from, c1, c2, to) { "worklet"; var term = 1 - t; var a = 1 * Math.pow(term, 3) * Math.pow(t, 0) * from; var b = 3 * Math.pow(term, 2) * Math.pow(t, 1) * c1; var c = 3 * Math.pow(term, 1) * Math.pow(t, 2) * c2; var d = 1 * Math.pow(term, 0) * Math.pow(t, 3) * to; return a + b + c + d; }; export var round = function round(value) { "worklet"; var precision = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0; var p = Math.pow(10, precision); return Math.round(value * p) / p; }; var cuberoot = function cuberoot(x) { "worklet"; var y = Math.pow(Math.abs(x), 1 / 3); return x < 0 ? -y : y; }; var solveCubic = function solveCubic(a, b, c, d) { "worklet"; if (Math.abs(a) < 1e-8) { a = b; b = c; c = d; if (Math.abs(a) < 1e-8) { a = b; b = c; if (Math.abs(a) < 1e-8) { return []; } return [-b / a]; } var D = b * b - 4 * a * c; if (Math.abs(D) < 1e-8) { return [-b / (2 * a)]; } else if (D > 0) { return [(-b + Math.sqrt(D)) / (2 * a), (-b - Math.sqrt(D)) / (2 * a)]; } return []; } var p = (3 * a * c - b * b) / (3 * a * a); var q = (2 * b * b * b - 9 * a * b * c + 27 * a * a * d) / (27 * a * a * a); var roots; if (Math.abs(p) < 1e-8) { roots = [cuberoot(-q)]; } else if (Math.abs(q) < 1e-8) { roots = [0].concat(p < 0 ? [Math.sqrt(-p), -Math.sqrt(-p)] : []); } else { var _D = q * q / 4 + p * p * p / 27; if (Math.abs(_D) < 1e-8) { roots = [-1.5 * q / p, 3 * q / p]; } else if (_D > 0) { var u = cuberoot(-q / 2 - Math.sqrt(_D)); roots = [u - p / (3 * u)]; } else { var _u = 2 * Math.sqrt(-p / 3); var t = Math.acos(3 * q / p / _u) / 3; var k = 2 * Math.PI / 3; roots = [_u * Math.cos(t), _u * Math.cos(t - k), _u * Math.cos(t - 2 * k)]; } } for (var i = 0; i < roots.length; i++) { roots[i] -= b / (3 * a); } return roots; }; export var cubicBezierYForX = function cubicBezierYForX(x, a, b, c, d) { "worklet"; var precision = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 2; var pa = -a.x + 3 * b.x - 3 * c.x + d.x; var pb = 3 * a.x - 6 * b.x + 3 * c.x; var pc = -3 * a.x + 3 * b.x; var pd = a.x - x; var t = solveCubic(pa, pb, pc, pd).map(function (root) { return round(root, precision); }).filter(function (root) { return root >= 0 && root <= 1; })[0]; return cubicBezier(t, a.y, b.y, c.y, d.y); };