@antv/util/lib/path/util/get-rotated-curve.js

> AntV 底层依赖的工具库，不建议在自己业务中使用。

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getRotatedCurve = getRotatedCurve;
var distance_square_root_1 = require("./distance-square-root");
function getRotations(a) {
    var segCount = a.length;
    var pointCount = segCount - 1;
    return a.map(function (f, idx) {
        return a.map(function (p, i) {
            var oldSegIdx = idx + i;
            var seg;
            if (i === 0 || (a[oldSegIdx] && a[oldSegIdx][0] === 'M')) {
                seg = a[oldSegIdx];
                return ['M'].concat(seg.slice(-2));
            }
            if (oldSegIdx >= segCount)
                oldSegIdx -= pointCount;
            return a[oldSegIdx];
        });
    });
}
function getRotatedCurve(a, b) {
    var segCount = a.length - 1;
    var lineLengths = [];
    var computedIndex = 0;
    var sumLensSqrd = 0;
    var rotations = getRotations(a);
    rotations.forEach(function (r, i) {
        a.slice(1).forEach(function (s, j) {
            // @ts-ignore
            sumLensSqrd += (0, distance_square_root_1.distanceSquareRoot)(a[(i + j) % segCount].slice(-2), b[j % segCount].slice(-2));
        });
        lineLengths[i] = sumLensSqrd;
        sumLensSqrd = 0;
    });
    computedIndex = lineLengths.indexOf(Math.min.apply(null, lineLengths));
    return rotations[computedIndex];
}
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