PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lwgeom_clip_by_rect()

LWGEOM* lwgeom_clip_by_rect ( const LWGEOM geom1,
double  x1,
double  y1,
double  x2,
double  y2 
)

Definition at line 1063 of file liblwgeom/lwgeom_geos.c.

1064 {
1065  LWGEOM *result;
1066  GEOSGeometry *g1, *g3;
1067  int is3d;
1068 
1069  /* A.Intersection(Empty) == Empty */
1070  if ( lwgeom_is_empty(geom1) )
1071  return lwgeom_clone_deep(geom1);
1072 
1073  is3d = FLAGS_GET_Z(geom1->flags);
1074 
1075  initGEOS(lwnotice, lwgeom_geos_error);
1076 
1077  if (!(g1 = LWGEOM2GEOS(geom1, AUTOFIX)))
1078  GEOS_FAIL_DEBUG();
1079 
1080  if (!(g3 = GEOSClipByRect(g1, x1, y1, x2, y2)))
1082 
1083  GEOS_FREE(g1);
1084  result = GEOS2LWGEOM(g3, is3d);
1085  GEOS_FREE(g3);
1086 
1087  if (!result)
1088  GEOS_FAIL_DEBUG();
1089 
1090  result->srid = geom1->srid;
1091 
1092  return result;
1093 }
char result[OUT_DOUBLE_BUFFER_SIZE]
Definition: cu_print.c:267
#define GEOS_FREE(...)
#define AUTOFIX
#define GEOS_FREE_AND_FAIL_DEBUG(...)
#define GEOS_FAIL_DEBUG()
GEOSGeometry * LWGEOM2GEOS(const LWGEOM *lwgeom, uint8_t autofix)
LWGEOM * GEOS2LWGEOM(const GEOSGeometry *geom, uint8_t want3d)
void lwgeom_geos_error(const char *fmt,...)
LWGEOM * lwgeom_clone_deep(const LWGEOM *lwgeom)
Deep clone an LWGEOM, everything is copied.
Definition: lwgeom.c:512
#define FLAGS_GET_Z(flags)
Definition: liblwgeom.h:179
void lwnotice(const char *fmt,...)
Write a notice out to the notice handler.
Definition: lwutil.c:177
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:203
int32_t srid
Definition: liblwgeom.h:474
lwflags_t flags
Definition: liblwgeom.h:475

References AUTOFIX, LWGEOM::flags, FLAGS_GET_Z, GEOS2LWGEOM(), GEOS_FAIL_DEBUG, GEOS_FREE, GEOS_FREE_AND_FAIL_DEBUG, LWGEOM2GEOS(), lwgeom_clone_deep(), lwgeom_geos_error(), lwgeom_is_empty(), lwnotice(), result, and LWGEOM::srid.

Referenced by mvt_unsafe_clip_by_box(), ST_ClipByBox2d(), and test_lwgeom_clip_by_rect().

Here is the call graph for this function:
Here is the caller graph for this function: