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+-- Copyright 2012 by Till Tantau
+--
+-- This file may be distributed and/or modified
+--
+-- 1. under the LaTeX Project Public License and/or
+-- 2. under the GNU Public License
+--
+-- See the file doc/generic/pgf/licenses/LICENSE for more information
+
+-- @release $Header: /cvsroot/pgf/pgf/generic/pgf/graphdrawing/lua/pgf/gd/layered/edge_routing.lua,v 1.3 2013/05/23 20:01:27 tantau Exp $
+
+
+local declare = require("pgf.gd.interface.InterfaceToAlgorithms").declare
+
+
+---
+-- @section subsection {Edge Routing}
+--
+-- The original layered drawing method described by Eades and Sugiyama
+-- in does not include the routing or shaping of edges as a main
+-- step. This makes sense if all nodes have the same size and
+-- shape. In practical scenarios, however, this assumption often does
+-- not hold. In these cases, advanced techniques may have to be
+-- applied in order to avoid overlaps of nodes and edges.
+--
+-- For more details, please see Section 4.1.5 of Pohlmann's Diploma
+-- thesis.
+--
+-- @end
+
+
+
+---
+
+declare {
+ key = "polyline layer edge routing",
+ algorithm = require "pgf.gd.layered.EdgeRoutingGansnerKNV1993",
+ phase = "layer edge routing",
+ phase_default = true,
+
+ summary = [["
+ This edge routing algorithm uses polygonal lines to connect nodes.
+ "]],
+ documentation = [["
+ For more details, please see Section 4.1.5 of Pohlmann's Diploma
+ thesis.
+
+ This is the default algorithm for edge routing.
+ "]]
+ }