!\brief * supporting curve of point * * \return supporting curve of point */

the following trivial is_valid to allow the user of derived face base classes to add their own purpose checking

Makes the `Vao` and its program not active.

! * Close the FIG file. */

Return the x-entry of o.

Return the y-entry of o.

Gets wrapped point set

Returns the number of vertices of the polygon.

Scene item

Begin Iterator */

! obtains the target vertex (const version). */

returns minimal end-point of an arc

returns handle for the vertex of index i

! \brief * returns a pair of \c int indicating whether event \c j is formed * by which arc numbers of the first and the second curve, or -1,

returns maximal end-point of an arc

returns an iterator pointing to the end of the map

\brief returns an iterator pointing to the beginning of the map all iterators run over sequenced indices

Add the given dart at the end of this path. @pre \link can_be_pushed `can_be_pushed(dh)`\endlink

\cond SKIP_IN_MANUAL