bywin-design/lib/mapUtils/index.js

bywin design

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = exports.containsPointInPolygonByXY = void 0;

/**
 * 判断一个点是否在多边形中
 * @param {*} points 多边形的点 [[x,y],[x1,y2]]
 * @param {*} point 需要判断的点 [x,y]
 */
var containsPointInPolygonByXY = function containsPointInPolygonByXY(points, point) {
  try {
    var length = points.length;
    var c = false;

    for (var i = 0, j = length - 1; i < length;) {
      if (points[i][1] > point[1] !== points[j][1] > point[1] && point[0] < (points[j][0] - points[i][0]) * (point[1] - points[i][1]) / (points[j][1] - points[i][1]) + points[i][0]) {
        c = !c;
      }

      j = i;
      i += 1;
    }

    return c;
  } catch (error) {
    console.error('判断点是否在多边形内报错', error);
    return null;
  }
};

exports.containsPointInPolygonByXY = containsPointInPolygonByXY;
var _default = {
  containsPointInPolygonByXY: containsPointInPolygonByXY
};
exports.default = _default;