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A model of the ArrangementPointLocation_2 concept can be attached to an Arrangement_2 instance and answer point-location queries on this arrangement. Namely, given a Arrangement_2::Point_2 object, representing a point in the plane, it returns the arrangement cell containing it. In the general case, the query point is contained inside an arrangement face, but in degenerate situations it may lie on an edge or coincide with an arrangement vertex.
| ArrangementPointLocation_2::Arrangement_2 | |
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the associated arrangement type.
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| ArrangementPointLocation_2::Point_2 | |
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equivalent to Arrangement_2::Point_2.
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| ArrangementPointLocation_2 pl; | |
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default constructor.
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| ArrangementPointLocation_2 pl ( Arrangement_2 arr); | |
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constructs a point-location object pl attached to the given
arrangement arr.
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| Object | pl.locate ( Point_2 q) const |
locates the arrangement cell that contains the query point q
and returns a handle for this cell.
The function returns an Object instance that wraps either of the
following types:
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| void | pl.attach ( Arrangement_2 arr) | attaches pl to the given arrangement arr. |
| void | pl.detach () | detaches pl from the arrangement it is currently attached to. |
Arr_naive_point_location<Arrangement>
Arr_walk_along_a_line_point_location<Arrangement>
Arr_trapezoid_ric_point_location<Arrangement>
Arr_landmarks_point_location<Arrangement,Generator>