PostGIS  2.5.7dev-r@@SVN_REVISION@@

◆ lwpoly_covers_lwline()

int lwpoly_covers_lwline ( const LWPOLY poly,
const LWLINE line 
)

Definition at line 2660 of file lwgeodetic.c.

2661 {
2662  /* Nulls and empties don't contain anything! */
2663  if ( ! poly || lwgeom_is_empty((LWGEOM*)poly) )
2664  {
2665  LWDEBUG(4,"returning false, geometry1 is empty or null");
2666  return LW_FALSE;
2667  }
2668 
2669  /* Nulls and empties don't contain anything! */
2670  if ( ! line || lwgeom_is_empty((LWGEOM*)line) )
2671  {
2672  LWDEBUG(4,"returning false, geometry2 is empty or null");
2673  return LW_FALSE;
2674  }
2675 
2676  if (LW_FALSE == lwpoly_covers_pointarray(poly, line->points))
2677  {
2678  LWDEBUG(4,"returning false, geometry2 has point outside of geometry1");
2679  return LW_FALSE;
2680  }
2681 
2682  /* check for any edge intersections, so nothing is partially outside of poly1 */
2683  if (LW_TRUE == lwpoly_intersects_line(poly, line->points))
2684  {
2685  LWDEBUG(4,"returning false, geometry2 is partially outside of geometry1");
2686  return LW_FALSE;
2687  }
2688 
2689  /* no abort condition found, so the poly2 should be completely inside poly1 */
2690  return LW_TRUE;
2691 }
#define LW_FALSE
Definition: liblwgeom.h:77
int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members)
Definition: lwgeom.c:1393
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:76
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:2715
int lwpoly_covers_pointarray(const LWPOLY *lwpoly, const POINTARRAY *pta)
return LW_TRUE if all points are inside the polygon
Definition: lwgeodetic.c:2696
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:83

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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