PostGIS  2.2.8dev-r@@SVN_REVISION@@

◆ ST_DistanceCPA()

Datum ST_DistanceCPA ( PG_FUNCTION_ARGS  )

Definition at line 75 of file lwgeom_functions_temporal.c.

References lwgeom_free(), lwgeom_from_gserialized(), lwgeom_tcpa(), PG_FUNCTION_INFO_V1(), and ST_CPAWithin().

Referenced by ST_IsValidTrajectory().

76 {
77  GSERIALIZED *gs0 = PG_GETARG_GSERIALIZED_P(0);
78  GSERIALIZED *gs1 = PG_GETARG_GSERIALIZED_P(1);
79  /* All checks already performed by liblwgeom, not worth checking again */
82  double mindist;
83  double m = lwgeom_tcpa(g0, g1, &mindist);
84  lwgeom_free(g0);
85  lwgeom_free(g1);
86  PG_FREE_IF_COPY(gs0, 0);
87  PG_FREE_IF_COPY(gs1, 1);
88  if ( m < 0 ) PG_RETURN_NULL();
89  PG_RETURN_FLOAT8(mindist);
90 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1050
double lwgeom_tcpa(const LWGEOM *g1, const LWGEOM *g2, double *mindist)
Find the time of closest point of approach.
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