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% | Reference manual page: GeneralDistance.tex
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% | 1.07.2001   Johan W.H. Tangelder
% | Package: ASPAS
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\RCSdef{\RCSGeneralDistanceRev}{$Revision$}
\RCSdefDate{\RCSGeneralDistanceDate}{$Date$}
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\begin{ccRefConcept}{GeneralDistance}

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\ccDefinition

Requirements of a distance class defining a distance between a query item
denoting a spatial object and a point.
To optimize distance computations transformed distances are used,
e.g., for a Euclidean distance the transformed distance is the squared
Euclidean distance.

\ccHasModels

\ccc{CGAL::Manhattan_distance_rectangle_point<Traits, IsoBox>}\\
\ccc{CGAL::Euclidean_distance_sphere_point<Traits, Sphere>}.


\ccTypes

\ccNestedType{FT}{Number type.}
\ccNestedType{Point_d}{Point type.}
\ccNestedType{Query_item}{Query item type.}

\ccCreationVariable{gd}  %% choose variable name

\ccOperations

\ccMethod{FT transformed_distance(Query_item q, Point_d r);}{Returns the transformed distance between \ccc{q} and~\ccc{r}.}

\ccMethod{FT min_distance_to_rectangle(Query_item q, Kd_tree_rectangle<FT> r);}
{Returns the transformed distance between \ccc{q} and
the point on the boundary of \ccc{r} closest to \ccc{q}.}

\ccMethod{FT max_distance_to_rectangle(Query_item q, Kd_tree_rectangle<FT> r);}
{Returns the transformed distance between \ccc{q} and
the point on the boundary of \ccc{r} furthest to \ccc{q}.}

\ccMethod{FT transformed_distance(FT d);} {Returns the transformed distance.}

\ccMethod{FT inverse_of_transformed_distance(FT d);} {Returns the inverse of the transformed distance.}




\end{ccRefConcept}

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