| Description: |
the horizontal position the edge. This is of interest only if the edge
crosses several levels because it specifies the point where the edge crosses the level. within a level. The nodes which are
specified with horizontal positions are ordered according to these positions within a level. The horizontal position of a
long edge that crosses the level specifies between which two node of that level the edge has to be drawn. Other edges which
do not have this attribute are inserted into this ordering by the crossing reduction mechanism. Note that connected components
are handled separately, thus it is not possible to intermix such components by specifying a horizontal order.
|