\RCSdef{\EnvelopeRefRev}{$Id$}
\RCSdefDate{\EnvelopeRefDate}{$Date$}
\ccRefChapter{Envelopes of Surfaces in 3D}
\label{chapterEnvelope_3_ref}
% \clearpage
\ccChapterRelease{\EnvelopeRefRev. \ \EnvelopeRefDate}
\ccChapterAuthor{Michal Meyerovitch and Ron Wein}

% ===============================================================
\section*{Introduction}
\label{env3_ref_sec:intro}
% ========================

This package consits of functions that compute the lower (or upper)
envelope of a set of arbitrary surfaces in 3D. The output is
represented as an 2D envelope diagram --- a planar subdivision such
that the identity of the surfaces that induce the envelope over each
diagram cell is unique.

\subsection*{Functions}

\ccRefIdfierPage{CGAL::lower_envelope_3}\\
\ccRefIdfierPage{CGAL::upper_envelope_3}

\subsection*{Concepts}

\ccRefConceptPage{EnvelopeTraits_3}

\subsection*{Classes}

\ccRefIdfierPage{CGAL::Envelope_diagram_2<EnvTraits>}\\
\\
\ccRefIdfierPage{CGAL::Env_triangle_traits_3<Kernel>}\\
\ccRefIdfierPage{CGAL::Env_sphere_traits_3<ConicTraits>}\\
\ccRefIdfierPage{CGAL::Env_surface_data_traits_2<Traits,XyData,SData,Cnv>}