\begin{ccRefFunction}{squared_distance} \ccInclude{CGAL/constructions_d.h} \ccFunction{FT squared_distance(Point_d p, Point_d q);} {computes the square of the Euclidean distance between the two points $p$ and $q$. \ccPrecond The dimensions of $p$ and $q$ are the same.} \end{ccRefFunction}