Method isQuadrilateralOverLap

src/openlayers/overlay/Label.js:908–944

* @function Label.prototype.isQuadrilateralOverLap * @description 判断两个四边形是否有压盖。 * @param {Array. } quadrilateral - 四边形节点数组。例如：[{"x":1,"y":1},{"x":3,"y":1},{"x":6,"y":4},{"x":2,"y":10},{"x":1,"y":1}]。 * @param {Array. } quadrilateral2 - 第二个四边形节点数组。 * @returns {boolea

(quadrilateral, quadrilateral2)

     * @returns {boolean} 是否压盖，true 表示压盖。
     */
    isQuadrilateralOverLap(quadrilateral, quadrilateral2) {
        var quadLen = quadrilateral.length,
            quad2Len = quadrilateral2.length;
        if (quadLen !== 5 || quad2Len !== 5) {
            return null;
        } //不是四边形

        var OverLap = false;
        //如果两四边形互不包含对方的节点，则两个四边形不相交
        for (let i = 0; i < quadLen; i++) {
            if (this.isPointInPoly(quadrilateral[i], quadrilateral2)) {
                OverLap = true;
                break;
            }
        }
        for (let i = 0; i < quad2Len; i++) {
            if (this.isPointInPoly(quadrilateral2[i], quadrilateral)) {
                OverLap = true;
                break;
            }
        }
        //加上两矩形十字相交的情况
        for (let i = 0; i < quadLen - 1; i++) {
            if (OverLap) {
                break;
            }
            for (var j = 0; j < quad2Len - 1; j++) {
                var isLineIn = CommonUtil.lineIntersection(quadrilateral[i], quadrilateral[i + 1], quadrilateral2[j], quadrilateral2[j + 1]);
                if (isLineIn.CLASS_NAME === "SuperMap.Geometry.Point") {
                    OverLap = true;
                    break;
                }
            }
        }

        return OverLap;
    }

    /**
     * @function Label.prototype.isPointInPoly