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closure_selector

Enumerates options for defining if polygons are open or closed.

Description

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

Synopsis

enum closure_selector {open = 0, closed = 1, closure_undertermined = -1};

Values

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

Header

#include <boost/geometry/core/closure.hpp>

See also

The closure metafunction


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