PostGIS  2.3.6-r@@SVN_REVISION@@
double lwgeom_perimeter ( const LWGEOM geom)

Definition at line 1615 of file lwgeom.c.

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

Referenced by LWGEOM_perimeter_poly().

1616 {
1617  int type = geom->type;
1618  if ( type == POLYGONTYPE )
1619  return lwpoly_perimeter((LWPOLY*)geom);
1620  else if ( type == CURVEPOLYTYPE )
1621  return lwcurvepoly_perimeter((LWCURVEPOLY*)geom);
1622  else if ( type == TRIANGLETYPE )
1623  return lwtriangle_perimeter((LWTRIANGLE*)geom);
1624  else if ( lwgeom_is_collection(geom) )
1625  {
1626  double perimeter = 0.0;
1627  int i;
1628  LWCOLLECTION *col = (LWCOLLECTION*)geom;
1629  for ( i = 0; i < col->ngeoms; i++ )
1630  perimeter += lwgeom_perimeter(col->geoms[i]);
1631  return perimeter;
1632  }
1633  else
1634  return 0.0;
1635 }
#define POLYGONTYPE
Definition: liblwgeom.h:86
#define CURVEPOLYTYPE
Definition: liblwgeom.h:93
#define TRIANGLETYPE
Definition: liblwgeom.h:97
double lwtriangle_perimeter(const LWTRIANGLE *triangle)
Definition: lwtriangle.c:209
double lwgeom_perimeter(const LWGEOM *geom)
Definition: lwgeom.c:1615
LWGEOM ** geoms
Definition: liblwgeom.h:508
double lwpoly_perimeter(const LWPOLY *poly)
Compute the sum of polygon rings length.
Definition: lwpoly.c:515
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:1004
uint8_t type
Definition: liblwgeom.h:395

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