* @function Label.prototype.getAvoidInfo * @description 获取避让的信息。 * @param {Bounds} bounds - 地图像素范围。 * @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}]。 * @returns {Object} 避让的信息。
(bounds, quadrilateral)
| 792 | * @returns {Object} 避让的信息。 |
| 793 | */ |
| 794 | getAvoidInfo(bounds, quadrilateral) { |
| 795 | if (quadrilateral.length !== 5) { |
| 796 | return null; |
| 797 | } //不是四边形 |
| 798 | |
| 799 | //将bound序列化为点数组形式 |
| 800 | var bounddQuad = [{ |
| 801 | "x": bounds.left, |
| 802 | "y": bounds.top |
| 803 | }, |
| 804 | { |
| 805 | "x": bounds.right, |
| 806 | "y": bounds.top |
| 807 | }, |
| 808 | { |
| 809 | "x": bounds.right, |
| 810 | "y": bounds.bottom |
| 811 | }, |
| 812 | { |
| 813 | "x": bounds.left, |
| 814 | "y": bounds.bottom |
| 815 | }, |
| 816 | { |
| 817 | "x": bounds.left, |
| 818 | "y": bounds.top |
| 819 | } |
| 820 | ]; |
| 821 | |
| 822 | var isIntersection = false, |
| 823 | bqLen = bounddQuad.length, |
| 824 | quadLen = quadrilateral.length; |
| 825 | |
| 826 | var offsetX = 0, |
| 827 | offsetY = 0, |
| 828 | aspectH = "", |
| 829 | aspectW = ""; |
| 830 | for (var i = 0; i < bqLen - 1; i++) { |
| 831 | for (var j = 0; j < quadLen - 1; j++) { |
| 832 | var isLineIn = CommonUtil.lineIntersection(bounddQuad[i], bounddQuad[i + 1], quadrilateral[j], quadrilateral[j + 1]); |
| 833 | if (isLineIn.CLASS_NAME === "SuperMap.Geometry.Point") { |
| 834 | //设置避让信息 |
| 835 | setInfo(quadrilateral[j]); |
| 836 | setInfo(quadrilateral[j + 1]); |
| 837 | isIntersection = true; |
| 838 | } |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | if (isIntersection) { |
| 843 | //组织避让操作所需的信息 |
| 844 | return { |
| 845 | "aspectW": aspectW, |
| 846 | "aspectH": aspectH, |
| 847 | "offsetX": offsetX, |
| 848 | "offsetY": offsetY |
| 849 | }; |
| 850 | } else { |
| 851 | return null; |
no test coverage detected