fuyuhang
/
Project_yhfu
镜像来自 http://121.37.83.100:3000/sooka_onest/sooka_onest_forestfire_vue2_visualization.git


			
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* Copyright© 2000 - 2021 SuperMap Software Co.Ltd. All rights reserved.
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    function processComplete(serviceResult) {
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        var feas = [];
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            var IHFeas = []; //岛洞多面
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</script>
<script type="text/javascript">
    /*
     * Method: islandHoleHandlerForFeature。
     * 要素岛洞处理。
     *
     * 多面中，一个子面包含另一个子面，则被包含子面处理为岛洞。
     *
     * Parameters:
     * multiPolygon - {<SuperMap.Feature.Vector>} 需要进行岛洞处理的要素。
     *
     * Returns:
     * {<SuperMap.Feature.Vector>} 处理后的要素。
     */
    function islandHoleHandlerForFeature(feature) {
        if (feature.geometry instanceof SuperMap.Geometry.MultiPolygon && feature.geometry.components.length > 1) {
            var newGeometry = islandHoleHandlerForMultiPolygon(feature.geometry);
            feature.geometry = newGeometry;
        }
        return feature;

        /*
         * Method: islandHoleHandlerForMultiPolygon
         * 处理误判为岛洞的多面。
         *
         * iClient 在解析 iServer 数据时，默认将面要素处理为 MultiPolygon 类型，但有的面要素带有岛洞，
         * 这种情况下应该做特殊处理，本函数可以对一个多面进行岛洞处理，并返回新的多面。
         *
         * Parameters:
         * multiPolygon - {<SuperMap.Geometry.MultiPolygon>} 需要进行岛洞处理的多面。
         *
         * Returns:
         * {<SuperMap.Geometry.MultiPolygon>} 处理后的多面。
         */
        function islandHoleHandlerForMultiPolygon(multiPolygon) {
            if (!(multiPolygon instanceof SuperMap.Geometry.MultiPolygon) || multiPolygon.components.length < 2) {
                return multiPolygon;
            }
            var mPTmp = multiPolygon.clone();
            var componentsPolygons = mPTmp.components;

            //洞面关系数组
            var polygonHoleGroup = [];

            for (var k = 0, len = componentsPolygons.length; k < len; k++) {
                var geoPolygon = componentsPolygons[k];

                //不处理已经是岛洞的面
                if (geoPolygon.components.length != 1) {
                    continue;
                }
                var lineRings = geoPolygon.components[0];

                //将每个点放到面中进行判断
                for (var j = 0, len1 = componentsPolygons.length; j < len1; j++) {
                    if (componentsPolygons[j].components.length != 1 || (j == k)) continue;
                    var polygonGeoComp = componentsPolygons[j].components[0].components;

                    //假设此面为岛洞
                    var isAllPoiIn = true;

                    for (var i = 0, len2 = geoPolygon.components.length; i < len2; i++) {
                        var point = lineRings.components[i];
                        if (isPointInPoly(point, polygonGeoComp) == false) {
                            isAllPoiIn = false;
                        }
                    }

                    //确定并记录洞面关系
                    if (isAllPoiIn == true) {
                        var polygonHole = [j, k];
                        polygonHoleGroup.push(polygonHole);
                    }
                }
            }

            // 根据洞面信息重构多面 Geometry。

            var bPsTmp = [];
            var hPsTmp = [];
            for (var m = 0, len3 = polygonHoleGroup.length; m < len3; m++) {
                bPsTmp.push(polygonHoleGroup[m][0]);
                hPsTmp.push(polygonHoleGroup[m][1]);
            }

            //岛洞基础面
            var bPs = delRepeatInArray(bPsTmp);
            //洞面
            var hPs = delRepeatInArray(hPsTmp);

            //独立面
            var iPs = [];
            //查找独立面
            for (var isIPs = 0, compLen = componentsPolygons.length; isIPs < compLen; isIPs++) {
                var isNoHP = true;

                for (var o = 0, len = bPs.length; o < len; o++) {
                    if (isIPs == bPs[o]) {
                        isNoHP = false;
                        break;
                    }
                }

                if (isNoHP == true) {
                    for (var o = 0, len = hPs.length; o < len; o++) {
                        if (isIPs == hPs[o]) {
                            isNoHP = false;
                            break;
                        }
                    }
                }

                if (isNoHP == true) {
                    iPs.push(isIPs);
                }
            }

            //新洞面信息
            var hpInfo = [];

            //组织新geometry所需要的信息
            for (var o = 0, len4 = bPs.length; o < len4; o++) {
                var ph = [];
                ph.push(bPs[o]);
                for (var m = 0, len3 = polygonHoleGroup.length; m < len3; m++) {
                    if (bPs[o] == polygonHoleGroup[m][0]) {
                        ph.push(polygonHoleGroup[m][1]);
                    }
                }

                if (ph.length > 1) {
                    hpInfo.push(ph);
                }
            }


            var newComponents = [];
            //岛洞子面处理
            for (var m = 0, len3 = hpInfo.length; m < len3; m++) {
                var geoP = hpInfo[m];
                var newLineRings = [];
                for (var n = 0, len6 = geoP.length; n < len6; n++) {
                    newLineRings.push(componentsPolygons[geoP[n]].components[0]);
                }
                var newGeoPolygon = new SuperMap.Geometry.Polygon(newLineRings);
                newComponents.push(newGeoPolygon)
            }

            //独立子面处理
            for (var s = 0, len7 = iPs.length; s < len7; s++) {
                var is = iPs[s];
                newComponents.push(componentsPolygons[is])
            }

            multiPolygon.components = newComponents;
            return multiPolygon;
        }

        /*
         * Method: delRepeatInArray
         * 删除数组中的重复元素。
         *
         * Parameters:
         * arr - {Array} 要进行重复元素删除的数组。
         *
         * Returns:
         * {Array} 无重复元素的数组。
         */
        function delRepeatInArray(arr) {
            var newArray = [];
            var provisionalTable = {};
            for (var i = 0, a; (a = arr[i]) != null; i++) {
                if (!provisionalTable[a]) {
                    newArray.push(a);
                    provisionalTable[a] = true;
                }
            }
            return newArray;
        }

        /*
         * Method: PointInPoly
         * 判断一个点是否在多边形里面。(射线法)
         *
         * Parameters:
         * pt - {Object} 需要判定的点对象，该对象含有属性x(横坐标)，属性y(纵坐标)。
         * poly - {Array(Objecy)}  多边形节点数组。例如一个四边形：[{"x":1,"y":1},{"x":3,"y":1},{"x":6,"y":4},{"x":2,"y":10},{"x":1,"y":1}]。
         *
         * Returns:
         * {Boolean} 点是否在多边形内。
         */
        function isPointInPoly(pt, poly) {
            for (var isIn = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)
                ((poly[i].y <= pt.y && pt.y < poly[j].y) || (poly[j].y <= pt.y && pt.y < poly[i].y))
                && (pt.x < (poly[j].x - poly[i].x) * (pt.y - poly[i].y) / (poly[j].y - poly[i].y) + poly[i].x)
                && (isIn = !isIn);
            return isIn;
        }
    }
</script>
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