* @function LabelThemeLayer.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)
| 819 | * @returns {Object} 避让的信息。 |
| 820 | */ |
| 821 | getAvoidInfo(bounds, quadrilateral) { |
| 822 | if (quadrilateral.length !== 5) { |
| 823 | return null; |
| 824 | } //不是四边形 |
| 825 | |
| 826 | //将bound序列化为点数组形式 |
| 827 | var bounddQuad = [{ |
| 828 | "x": bounds.left, |
| 829 | "y": bounds.top |
| 830 | }, |
| 831 | { |
| 832 | "x": bounds.right, |
| 833 | "y": bounds.top |
| 834 | }, |
| 835 | { |
| 836 | "x": bounds.right, |
| 837 | "y": bounds.bottom |
| 838 | }, |
| 839 | { |
| 840 | "x": bounds.left, |
| 841 | "y": bounds.bottom |
| 842 | }, |
| 843 | { |
| 844 | "x": bounds.left, |
| 845 | "y": bounds.top |
| 846 | } |
| 847 | ]; |
| 848 | |
| 849 | var isIntersection = false, |
| 850 | bqLen = bounddQuad.length, |
| 851 | quadLen = quadrilateral.length; |
| 852 | |
| 853 | var offsetX = 0, |
| 854 | offsetY = 0, |
| 855 | aspectH = "", |
| 856 | aspectW = ""; |
| 857 | for (var i = 0; i < bqLen - 1; i++) { |
| 858 | for (var j = 0; j < quadLen - 1; j++) { |
| 859 | var isLineIn = Util.lineIntersection(bounddQuad[i], bounddQuad[i + 1], quadrilateral[j], quadrilateral[j + 1]); |
| 860 | if (isLineIn.CLASS_NAME === "SuperMap.Geometry.Point") { |
| 861 | //设置避让信息 |
| 862 | setInfo(quadrilateral[j]); |
| 863 | setInfo(quadrilateral[j + 1]); |
| 864 | isIntersection = true; |
| 865 | } |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | if (isIntersection) { |
| 870 | //组织避让操作所需的信息 |
| 871 | return { |
| 872 | "aspectW": aspectW, |
| 873 | "aspectH": aspectH, |
| 874 | "offsetX": offsetX, |
| 875 | "offsetY": offsetY |
| 876 | }; |
| 877 | } else { |
| 878 | return null; |
no test coverage detected