PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lwpoly_covers_lwline()

int lwpoly_covers_lwline ( const LWPOLY poly,
const LWLINE line 
)

Definition at line 2650 of file lwgeodetic.c.

2651 {
2652  /* Nulls and empties don't contain anything! */
2653  if ( ! poly || lwgeom_is_empty((LWGEOM*)poly) )
2654  {
2655  LWDEBUG(4,"returning false, geometry1 is empty or null");
2656  return LW_FALSE;
2657  }
2658 
2659  /* Nulls and empties don't contain anything! */
2660  if ( ! line || lwgeom_is_empty((LWGEOM*)line) )
2661  {
2662  LWDEBUG(4,"returning false, geometry2 is empty or null");
2663  return LW_FALSE;
2664  }
2665 
2666  if (LW_FALSE == lwpoly_covers_pointarray(poly, line->points))
2667  {
2668  LWDEBUG(4,"returning false, geometry2 has point outside of geometry1");
2669  return LW_FALSE;
2670  }
2671 
2672  /* check for any edge intersections, so nothing is partially outside of poly1 */
2673  if (LW_TRUE == lwpoly_intersects_line(poly, line->points))
2674  {
2675  LWDEBUG(4,"returning false, geometry2 is partially outside of geometry1");
2676  return LW_FALSE;
2677  }
2678 
2679  /* no abort condition found, so the poly2 should be completely inside poly1 */
2680  return LW_TRUE;
2681 }
#define LW_FALSE
Definition: liblwgeom.h:108
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:107
int lwpoly_intersects_line(const LWPOLY *lwpoly, const POINTARRAY *line)
Checks if any edges of lwpoly intersect with the line formed by the pointarray return LW_TRUE if any ...
Definition: lwgeodetic.c:2705
int lwpoly_covers_pointarray(const LWPOLY *lwpoly, const POINTARRAY *pta)
return LW_TRUE if all points are inside the polygon
Definition: lwgeodetic.c:2686
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:83
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

References LW_FALSE, LW_TRUE, LWDEBUG, lwgeom_is_empty(), lwpoly_covers_pointarray(), lwpoly_intersects_line(), and LWLINE::points.

Referenced by lwgeom_covers_lwgeom_sphere().

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