PostGIS  2.5.0beta2dev-r@@SVN_REVISION@@

◆ ST_IsPolygonCW()

Datum ST_IsPolygonCW ( PG_FUNCTION_ARGS  )

Definition at line 1273 of file lwgeom_functions_analytic.c.

References dumpnode::geom, is_clockwise(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_is_clockwise(), PG_FUNCTION_INFO_V1(), and ST_IsPolygonCCW().

Referenced by ST_GeometricMedian().

1274 {
1275  GSERIALIZED* geom;
1276  LWGEOM* input;
1277  bool is_clockwise;
1278 
1279  if (PG_ARGISNULL(0))
1280  PG_RETURN_NULL();
1281 
1282  geom = PG_GETARG_GSERIALIZED_P(0);
1283  input = lwgeom_from_gserialized(geom);
1284 
1285  is_clockwise = lwgeom_is_clockwise(input);
1286 
1287  lwgeom_free(input);
1288  PG_FREE_IF_COPY(geom, 0);
1289 
1290  PG_RETURN_BOOL(is_clockwise);
1291 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1144
LWGEOM * geom
static int is_clockwise(int num_points, double *x, double *y, double *z)
int lwgeom_is_clockwise(LWGEOM *lwgeom)
Ensure the outer ring is clockwise oriented and all inner rings are counter-clockwise.
Definition: lwgeom.c:65
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