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| import { min as v2Min, max as v2Max, scale as v2Scale, distance as v2Distance, add as v2Add, clone as v2Clone, sub as v2Sub } from '../../core/vector.js';
| export default function smoothBezier(points, smooth, isLoop, constraint) {
| var cps = [];
| var v = [];
| var v1 = [];
| var v2 = [];
| var prevPoint;
| var nextPoint;
| var min;
| var max;
| if (constraint) {
| min = [Infinity, Infinity];
| max = [-Infinity, -Infinity];
| for (var i = 0, len = points.length; i < len; i++) {
| v2Min(min, min, points[i]);
| v2Max(max, max, points[i]);
| }
| v2Min(min, min, constraint[0]);
| v2Max(max, max, constraint[1]);
| }
| for (var i = 0, len = points.length; i < len; i++) {
| var point = points[i];
| if (isLoop) {
| prevPoint = points[i ? i - 1 : len - 1];
| nextPoint = points[(i + 1) % len];
| }
| else {
| if (i === 0 || i === len - 1) {
| cps.push(v2Clone(points[i]));
| continue;
| }
| else {
| prevPoint = points[i - 1];
| nextPoint = points[i + 1];
| }
| }
| v2Sub(v, nextPoint, prevPoint);
| v2Scale(v, v, smooth);
| var d0 = v2Distance(point, prevPoint);
| var d1 = v2Distance(point, nextPoint);
| var sum = d0 + d1;
| if (sum !== 0) {
| d0 /= sum;
| d1 /= sum;
| }
| v2Scale(v1, v, -d0);
| v2Scale(v2, v, d1);
| var cp0 = v2Add([], point, v1);
| var cp1 = v2Add([], point, v2);
| if (constraint) {
| v2Max(cp0, cp0, min);
| v2Min(cp0, cp0, max);
| v2Max(cp1, cp1, min);
| v2Min(cp1, cp1, max);
| }
| cps.push(cp0);
| cps.push(cp1);
| }
| if (isLoop) {
| cps.push(cps.shift());
| }
| return cps;
| }
|
|
