PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lwgeom_perimeter()

double lwgeom_perimeter ( const LWGEOM geom)

Definition at line 1885 of file lwgeom.c.

1886 {
1887  int type = geom->type;
1888  if ( type == POLYGONTYPE )
1889  return lwpoly_perimeter((LWPOLY*)geom);
1890  else if ( type == CURVEPOLYTYPE )
1891  return lwcurvepoly_perimeter((LWCURVEPOLY*)geom);
1892  else if ( type == TRIANGLETYPE )
1893  return lwtriangle_perimeter((LWTRIANGLE*)geom);
1894  else if ( lwgeom_is_collection(geom) )
1895  {
1896  double perimeter = 0.0;
1897  uint32_t i;
1898  LWCOLLECTION *col = (LWCOLLECTION*)geom;
1899  for ( i = 0; i < col->ngeoms; i++ )
1900  perimeter += lwgeom_perimeter(col->geoms[i]);
1901  return perimeter;
1902  }
1903  else
1904  return 0.0;
1905 }
#define CURVEPOLYTYPE
Definition: liblwgeom.h:125
#define POLYGONTYPE
Definition: liblwgeom.h:118
#define TRIANGLETYPE
Definition: liblwgeom.h:129
double lwtriangle_perimeter(const LWTRIANGLE *triangle)
Definition: lwtriangle.c:201
double lwcurvepoly_perimeter(const LWCURVEPOLY *poly)
Definition: lwcurvepoly.c:147
double lwpoly_perimeter(const LWPOLY *poly)
Compute the sum of polygon rings length.
Definition: lwpoly.c:467
int lwgeom_is_collection(const LWGEOM *geom)
Determine whether a LWGEOM can contain sub-geometries or not.
Definition: lwgeom.c:1080
double lwgeom_perimeter(const LWGEOM *geom)
Definition: lwgeom.c:1885
type
Definition: ovdump.py:42
uint32_t ngeoms
Definition: liblwgeom.h:594
LWGEOM ** geoms
Definition: liblwgeom.h:589
uint8_t type
Definition: liblwgeom.h:476

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

Referenced by lwgeom_perimeter(), and LWGEOM_perimeter_poly().

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