Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Enumerates options for defining if polygons are open or closed.
The enumeration closure_selector describes options for if a polygon is open or closed. In a closed polygon the very first point (per ring) should be equal to the very last point. The specific closing property of a polygon type is defined by the closure metafunction. The closure metafunction defines a value, which is one of the values enumerated in the closure_selector
enum closure_selector {open = 0, closed = 1, closure_undertermined = -1};
|
Value |
Description |
|---|---|
|
open |
Rings are open: first point and last point are different, algorithms close them explicitly on the fly |
|
closed |
Rings are closed: first point and last point must be the same. |
|
closure_undertermined |
(Not yet implemented): algorithms first figure out if ring must be closed on the fly |
Either
#include <boost/geometry.hpp>
Or
#include <boost/geometry/core/closure.hpp>