Method determineQuadrant

src/common/commontypes/Bounds.js:571–580

* @function Bounds.prototype.determineQuadrant * @description 判断传入坐标是否在 bounds 范围内的象限。以 bounds 中心点为坐标原点。 * @example * var bounds = new Bounds(-180,-90,100,80); * //str = "tr"; * var str = bounds.determineQuadrant( * new LonLat(20,20) * ); * @param {LonLa

(lonlat)

     * @returns {string} 传入坐标所在的象限（"br" "tr" "tl" "bl" 分别对应"右下"，"右上"，"左上" "左下"）。
     */
    determineQuadrant(lonlat) {

        var quadrant = "";
        var center = this.getCenterLonLat();

        quadrant += (lonlat.lat < center.lat) ? "b" : "t";
        quadrant += (lonlat.lon < center.lon) ? "l" : "r";

        return quadrant;
    }

    /**
     * @function Bounds.prototype.wrapDateLine