CGAL 5.6.3 - dD Range and Segment Trees

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Sublayer Concept Reference
dD Range and Segment Trees Reference » Concepts

## Definition

Defines the requirements that a `Sublayer_type` of class `CGAL::Range_tree_d` or `CGAL::Segment_tree_d` has to fulfill.

First of all, the class has to be derived from the abstract base class `CGAL::Tree_base` and therefore has to provide methods `make_tree`, `window_query`, `enclosing_query` and `is_inside` with the same parameter types as the instantiated class `Range_tree_d` or `Segment_tree_d`, respectively. Furthermore a method `bool is_anchor()` has to be provided. If the `Sublayer_type` class builds a recursion anchor for class `Segment_tree_d`, this function is expected to return `true`, `false` otherwise.

Such a recursion anchor class is provided by the class class. `CGAL::Tree_anchor<Data, Window>`.