CGAL 6.1 - 2D Arrangements

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AosTopSideTraits_2 Concept Reference
Reference Manual » Concepts » Geometry Traits Concepts

## Definition

`AosTopSideTraits_2` is an abstract concept. It generalizes all concepts that handle curves that either reach or approach the top boundary side of the parameter space. (An "abstract" concept is a concept that is useless on its own.) Only a combination of this concept and additional concepts that handle curves that either reach or approach the remaining boundary sides (that is, left, right, and bottom) are purposeful, and can have models.

Refines
  `AosHorizontalSideTraits_2`

See also
  `AosLeftSideTraits_2`
  `AosRightSideTraits_2`
  `AosBottomSideTraits_2`