MapBox interiorPolygons 无法显示某些区域的孔

Question

平台：xcode9.2iOSobjective-c Mapbox SDK 版本：Mapbox-iOS-SDK (3.7.2)

预期行为我想在世界迷雾的某个区域挖一些洞，大部分区域都能出现。但有些区域不能显示孔。例如下面的代码：一个六边形孔 Ulitsa Malaya Polyanka, 5, 莫斯科, 俄罗斯, 119180 纬度：55.735024 |经度：37.617188.

实际行为该地区没有洞 Ulitsa Malaya Polyanka, 5, 莫斯科, 俄罗斯, 119180 纬度：55.735024 |经度：37.617188.

CLLocationCoordinate2D lightCoordinate[6] = { {55.735024042991469,  37.617187500000007}, {55.742165827861974,37.595214843749993}, {55.75644547726997, 37.595214843749993}, {55.763583342064059, 37.617187500000007}, {55.75644547726997, 37.639160156249993}, {55.742165827861974, 37.639160156249993} };
NSUInteger numberOfLightCoordinates = sizeof(lightCoordinate) / sizeof(CLLocationCoordinate2D);
    MGLPolygon *lightPolygon = [MGLPolygon polygonWithCoordinates:lightCoordinate count:numberOfLightCoordinates];
NSArray<MGLPolygon *> *lightPolygonArray = @[lightPolygon];

CLLocationCoordinate2D worldCoords[6] = { {90, 0}, {90, 180}, {-90,180}, {-90,0}, {-90,-180}, {90,-180} };
        NSUInteger numberOfWorldCoords = sizeof(worldCoords) / sizeof(CLLocationCoordinate2D);
        MGLPolygon *worldOverlay = [MGLPolygon polygonWithCoordinates:worldCoords
                                                         count:numberOfWorldCoords
                                              interiorPolygons:lightPolygonArray];
        //the array can have more than one "cutout" if needed

        [self.mapBoxView addOverlay:self.worldOverlay];

Answer 1

我用一些技巧解决了这个问题。将地球分为南北两部分。每个部分都有切口阵列。代码如下

CLLocationCoordinate2D northWorldCoords[4] = { {0, -180}, {0, 180}, {90, 180}, {90, -180}};
        NSUInteger northNumberOfWorldCoords = sizeof(northWorldCoords) / sizeof(CLLocationCoordinate2D);
        _northWorldOverlay = [MGLPolygon polygonWithCoordinates:northWorldCoords
                                                         count:northNumberOfWorldCoords
                                              interiorPolygons:northLightPolygonArray];
        //the array can have more than one "cutout" if needed

        [self.chillViewController.mapBoxView addOverlay:_northWorldOverlay];

        CLLocationCoordinate2D southWorldCoords[4] = {{0, -180}, {0, 180}, {-90, 180}, {-90, -180}};
        NSUInteger southNumberOfWorldCoords = sizeof(southWorldCoords) / sizeof(CLLocationCoordinate2D);
        _southWorldOverlay = [MGLPolygon polygonWithCoordinates:southWorldCoords
                                                         count:southNumberOfWorldCoords
                                              interiorPolygons:southLightPolygonArray];
        //the array can have more than one "cutout" if needed

        [self.chillViewController.mapBoxView addOverlay:_southWorldOverlay];

MapBox interiorPolygons 无法显示某些区域的孔

MapBox interiorPolygons can not show the hole in some area

polygons

ios

mapbox