\RCSdef{\EnvelopePlnRefRev}{$Id$}
\RCSdefDate{\EnvelopePlnRefDate}{$Date$}
\clearpage
\ccRefChapter{Envelopes of Curves in 2D}
\label{chapterEnvelope2Ref}

\ccChapterAuthor{Ron Wein}

% ===============================================================
\section*{Introduction}
\label{env2_ref_sec:intro}
% ========================

This package consits of functions that compute the lower (or upper)
envelope of a set of arbitrary curves in 2D. The output is
represented as an envelope diagram, namely a subdivision of the
$x$-axis into intervals, such that the identity of the curves that
induce the envelope over each interval is unique.

\subsection*{Functions}

\ccRefIdfierPage{CGAL::lower_envelope_2}\\
\ccRefIdfierPage{CGAL::upper_envelope_2}\\
\ccRefIdfierPage{CGAL::lower_envelope_x_monotone_2}\\
\ccRefIdfierPage{CGAL::upper_envelope_x_monotone_2}

\subsection*{Concepts}

\ccRefConceptPage{EnvelopeDiagram_1}\\
\ccRefConceptPage{EnvelopeDiagramVertex}\\
\ccRefConceptPage{EnvelopeDiagramEdge}

\subsection*{Classes}

\ccRefIdfierPage{CGAL::Env_default_diagram_1<Traits>}


