# rewind
Rewind (Multi)LineString or (Multi)Polygon outer ring counterclockwise and inner rings clockwise (Uses Shoelace Formula ).
LineString
或Polygon
外圈逆时针倒带,内圈顺时针倒带(Shoelace formula公式)。
参数
参数 | 类型 | 描述 |
---|---|---|
geojson | GeoJSON | input GeoJSON Polygon |
options | Object | Optional parameters: see below |
options选项
属性 | 类型 | 默认值 | 描述 |
---|---|---|---|
reverse | boolean | false | enable reverse winding |
mutate | boolean | false | allows GeoJSON input to be mutated (significant performance increase if true) |
返回
GeoJSON - rewind Polygon
示例
var polygon = turf.polygon([[[121, -29], [138, -29], [138, -18], [121, -18], [121, -29]]]);
var rewind = turf.rewind(polygon);
