ArrTraits::ParameterSpaceInY_2 Concept Reference

Definition

Refines

AdaptableBinaryFunction

Has models

ArrangementHorizontalSideTraits_2::Parameter_space_in_y_2

ArrangementOpenBoundaryTraits_2::Parameter_space_in_y_2

ArrangementSphericalBoundaryTraits_2::Parameter_space_in_y_2

Operations
A model of this concept must provide:
CGAL::Arr_parameter_space	operator() (const ArrTraits::X_monotone_curve_2 &xcv, CGAL::Arr_curve_end ce)
	Given an \(x\)-monotone curve xcv and an enumeration ce that specifies either the minimum or the maximum end of the curve, determines the location of the curve end along the \(y\)-dimension.

Member Function Documentation

operator()()

CGAL::Arr_parameter_space ArrTraits::ParameterSpaceInY_2::operator()	(	const ArrTraits::X_monotone_curve_2 &	xcv,
		CGAL::Arr_curve_end	ce
	)

Given an \(x\)-monotone curve xcv and an enumeration ce that specifies either the minimum or the maximum end of the curve, determines the location of the curve end along the \(y\)-dimension.

The variable xcv identifies the parametric curve \(c(t) = (x(t),y(t))\) defined over an open or half-open interval with endpoints \( 0\) and \(1\). The enumeration ce identifies an open end \(d \in\{0,1\}\) of \(c\). Formally, determines whether \(\lim_{t \rightarrow d} y(t)\) evaluates to \(b_b\), \(b_t\), or a value in between, where \(b_b\) and \(b_t\) are the \(y\)-coordinates of the bottom and top boundaries of the parameter space, respectively. Returns CGAL::ARR_BOTTOM_BOUNDARY, CGAL::ARR_TOP_BOUNDARY, or CGAL::ARR_INTERIOR, accordingly.

Postcondition

If ArrTraits::Bottom_side_category is convertible to CGAL::Arr_oblivious_side_tag then the result is not CGAL::ARR_BOTTOM_BOUNDARY .

If ArrTraits::Top_side_category is convertible to CGAL::Arr_oblivious_side_tag then the result is not CGAL::ARR_TOP_BOUNDARY.