1 | "use strict";
|
2 |
|
3 | Object.defineProperty(exports, "__esModule", {
|
4 | value: true
|
5 | });
|
6 | exports.basis = basis;
|
7 | exports.default = _default;
|
8 |
|
9 | function basis(t1, v0, v1, v2, v3) {
|
10 | var t2 = t1 * t1,
|
11 | t3 = t2 * t1;
|
12 | return ((1 - 3 * t1 + 3 * t2 - t3) * v0 + (4 - 6 * t2 + 3 * t3) * v1 + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2 + t3 * v3) / 6;
|
13 | }
|
14 |
|
15 | function _default(values) {
|
16 | var n = values.length - 1;
|
17 | return function (t) {
|
18 | var i = t <= 0 ? t = 0 : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
|
19 | v1 = values[i],
|
20 | v2 = values[i + 1],
|
21 | v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
|
22 | v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
|
23 | return basis((t - i / n) * n, v0, v1, v2, v3);
|
24 | };
|
25 | } |
\ | No newline at end of file |