ST_DistanceCPA()

Datum ST_DistanceCPA

(

PG_FUNCTION_ARGS

)

Definition at line 87 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().

{
  GSERIALIZED *gs0 = PG_GETARG_GSERIALIZED_P(0);
  GSERIALIZED *gs1 = PG_GETARG_GSERIALIZED_P(1);
  /* All checks already performed by liblwgeom, not worth checking again */
  LWGEOM *g0 = lwgeom_from_gserialized(gs0);
  LWGEOM *g1 = lwgeom_from_gserialized(gs1);
  double mindist;
  double m = lwgeom_tcpa(g0, g1, &mindist);
  lwgeom_free(g0);
  lwgeom_free(g1);
  PG_FREE_IF_COPY(gs0, 0);
  PG_FREE_IF_COPY(gs1, 1);
        if ( m < 0 ) PG_RETURN_NULL();
  PG_RETURN_FLOAT8(mindist);
}

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