\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.8 - 2D Regularized Boolean Set-Operations

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ArrDirectionalTraits::ConstructOpposite_2 Concept Reference
Concepts

## Definition

Refines:
  `AdaptableUnaryFunction`

Has Models:
  `ArrangementDirectionalXMonotoneTraits_2::Construct_opposite_2`

## Operations
A model of this concept must provide:
ArrDirectionalTraits::X_monotone_curve_2 | operator() (ArrDirectionalTraits::X_monotone_curve_2 xc)
| accepts an \( x\)-monotone curve `xc` and returns its opposite curve, namely a curve whose graph is the same as `xc`'s, and whose source and target are swapped with respect to `xc`'s source and target.