Controls how, and if, edges are represented.
splines=true, edges are drawn as splines routed around nodes; if
splines=false, edges are drawn as line segments. If
splines="", no edges are drawn at all.
(1 March 2007)
splines=spline can be
used as synonyms for
splines=polyline specifies that edges should be drawn as
(28 Sep 2010)
splines=ortho specifies edges should be
routed as polylines of axis-aligned segments. Currently, the routing
does not handle ports or, in dot, edge labels.
(25 Sep 2012)
splines=curved specifies edges should be drawn as curved
splines is unset. How this is interpreted depends on
the layout engine. For
dot, the default is to draw edges as splines. For all
other layouts, the default is to draw edges as line segments.
Note that for these latter layouts, if
requires non-overlapping nodes (cf.
fdp is used for layout and
splines="compound", then the edges are
drawn to avoid clusters as well as nodes.