PostGIS  3.7.0dev-r@@SVN_REVISION@@

◆ LWGEOM_shortestline2d()

Datum LWGEOM_shortestline2d ( PG_FUNCTION_ARGS  )

Definition at line 644 of file lwgeom_functions_basic.c.

645 {
646  GSERIALIZED *result;
647  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
648  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
649  LWGEOM *theline;
650  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
651  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
652  gserialized_error_if_srid_mismatch(geom1, geom2, __func__);
653 
654  theline = lwgeom_closest_line(lwgeom1, lwgeom2);
655 
656  if (lwgeom_is_empty(theline))
657  PG_RETURN_NULL();
658 
659  result = geometry_serialize(theline);
660  lwgeom_free(theline);
661  lwgeom_free(lwgeom1);
662  lwgeom_free(lwgeom2);
663 
664  PG_FREE_IF_COPY(geom1, 0);
665  PG_FREE_IF_COPY(geom2, 1);
666  PG_RETURN_POINTER(result);
667 }
result
char result[OUT_DOUBLE_BUFFER_SIZE]
Definition: cu_print.c:267
gserialized_error_if_srid_mismatch
void gserialized_error_if_srid_mismatch(const GSERIALIZED *g1, const GSERIALIZED *g2, const char *funcname)
Definition: gserialized.c:432
lwgeom_from_gserialized
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
Definition: gserialized.c:268
lwgeom_free
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1218
lwgeom_closest_line
LWGEOM * lwgeom_closest_line(const LWGEOM *lw1, const LWGEOM *lw2)
Definition: measures.c:43
lwgeom_is_empty
static int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members)
Definition: lwinline.h:199

References gserialized_error_if_srid_mismatch(), lwgeom_closest_line(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_is_empty(), and result.

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