PostGIS  2.3.8dev-r@@SVN_REVISION@@

◆ lwpoly_contains_point()

int lwpoly_contains_point ( const LWPOLY poly,
const POINT2D pt 
)

Definition at line 582 of file lwpoly.c.

References LW_FALSE, LW_INSIDE, LW_OUTSIDE, LW_TRUE, lwpoly_is_empty(), LWPOLY::nrings, ptarray_contains_point(), and LWPOLY::rings.

583 {
584  int i;
585 
586  if ( lwpoly_is_empty(poly) )
587  return LW_FALSE;
588 
589  if ( ptarray_contains_point(poly->rings[0], pt) == LW_OUTSIDE )
590  return LW_FALSE;
591 
592  for ( i = 1; i < poly->nrings; i++ )
593  {
594  if ( ptarray_contains_point(poly->rings[i], pt) == LW_INSIDE )
595  return LW_FALSE;
596  }
597  return LW_TRUE;
598 }
#define LW_FALSE
Definition: liblwgeom.h:76
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:75
POINTARRAY ** rings
Definition: liblwgeom.h:456
#define LW_INSIDE
Constants for point-in-polygon return values.
int nrings
Definition: liblwgeom.h:454
int ptarray_contains_point(const POINTARRAY *pa, const POINT2D *pt)
Return 1 if the point is inside the POINTARRAY, -1 if it is outside, and 0 if it is on the boundary...
Definition: ptarray.c:740
#define LW_OUTSIDE
int lwpoly_is_empty(const LWPOLY *poly)
Definition: lwpoly.c:405
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