import { cubicAt, cubicRootAt } from '../core/curve.js';
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import { trim } from '../core/util.js';
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var regexp = /cubic-bezier\(([0-9,\.e ]+)\)/;
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export function createCubicEasingFunc(cubicEasingStr) {
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var cubic = cubicEasingStr && regexp.exec(cubicEasingStr);
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if (cubic) {
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var points = cubic[1].split(',');
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var a_1 = +trim(points[0]);
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var b_1 = +trim(points[1]);
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var c_1 = +trim(points[2]);
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var d_1 = +trim(points[3]);
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if (isNaN(a_1 + b_1 + c_1 + d_1)) {
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return;
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}
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var roots_1 = [];
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return function (p) {
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return p <= 0
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? 0 : p >= 1
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? 1
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: cubicRootAt(0, a_1, c_1, 1, p, roots_1) && cubicAt(0, b_1, d_1, 1, roots_1[0]);
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};
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}
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}
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