Struct tg_geom 

pub struct tg_geom { /* private fields */ }

A geometry is the common generic type that can represent a Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, or GeometryCollection.

For geometries that are derived from GeoJSON, they may have addtional attributes such as being a Feature or a FeatureCollection; or include extra json fields.

Creating

To create a new geometry use one of the GeometryConstructors or GeometryParsing functions.

struct tg_geom *geom = tg_geom_new_point(point);
struct tg_geom *geom = tg_geom_new_polygon(poly);
struct tg_geom *geom = tg_parse_geojson(geojson);

Upcasting

Other types, specifically tg_line, tg_ring, and tg_poly, can be safely upcasted to a tg_geom; allowing them to use any tg_geom_*() function.

struct tg_geom *geom1 = (struct tg_geom*)line; // Cast to a LineString
struct tg_geom *geom2 = (struct tg_geom*)ring; // Cast to a Polygon
struct tg_geom *geom3 = (struct tg_geom*)poly; // Cast to a Polygon

• See GeometryConstructors
• See GeometryAccessors
• See GeometryPredicates
• See GeometryParsing
• See GeometryWriting