PostGIS  2.5.0dev-r@@SVN_REVISION@@

◆ lwgeom_perimeter()

double lwgeom_perimeter ( const LWGEOM geom)

Definition at line 1880 of file lwgeom.c.

References CURVEPOLYTYPE, LWCOLLECTION::geoms, lwcurvepoly_perimeter(), lwgeom_is_collection(), lwpoly_perimeter(), lwtriangle_perimeter(), LWCOLLECTION::ngeoms, POLYGONTYPE, TRIANGLETYPE, ovdump::type, and LWGEOM::type.

Referenced by LWGEOM_perimeter_poly().

1881 {
1882  int type = geom->type;
1883  if ( type == POLYGONTYPE )
1884  return lwpoly_perimeter((LWPOLY*)geom);
1885  else if ( type == CURVEPOLYTYPE )
1886  return lwcurvepoly_perimeter((LWCURVEPOLY*)geom);
1887  else if ( type == TRIANGLETYPE )
1888  return lwtriangle_perimeter((LWTRIANGLE*)geom);
1889  else if ( lwgeom_is_collection(geom) )
1890  {
1891  double perimeter = 0.0;
1892  uint32_t i;
1893  LWCOLLECTION *col = (LWCOLLECTION*)geom;
1894  for ( i = 0; i < col->ngeoms; i++ )
1895  perimeter += lwgeom_perimeter(col->geoms[i]);
1896  return perimeter;
1897  }
1898  else
1899  return 0.0;
1900 }
#define POLYGONTYPE
Definition: liblwgeom.h:86
#define CURVEPOLYTYPE
Definition: liblwgeom.h:93
#define TRIANGLETYPE
Definition: liblwgeom.h:97
uint32_t ngeoms
Definition: liblwgeom.h:509
double lwtriangle_perimeter(const LWTRIANGLE *triangle)
Definition: lwtriangle.c:208
unsigned int uint32_t
Definition: uthash.h:78
double lwgeom_perimeter(const LWGEOM *geom)
Definition: lwgeom.c:1880
LWGEOM ** geoms
Definition: liblwgeom.h:511
double lwpoly_perimeter(const LWPOLY *poly)
Compute the sum of polygon rings length.
Definition: lwpoly.c:474
double lwcurvepoly_perimeter(const LWCURVEPOLY *poly)
Definition: lwcurvepoly.c:147
int lwgeom_is_collection(const LWGEOM *geom)
Determine whether a LWGEOM can contain sub-geometries or not.
Definition: lwgeom.c:1085
uint8_t type
Definition: liblwgeom.h:398
type
Definition: ovdump.py:41
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