NAME

       edgepaint - edge coloring to disambiguate crossing edges

SYNOPSIS

       [ options ] [ -o outfile ] [ files ]

DESCRIPTION

       edgepaint  takes  as  input  a graph in DOT format with node position information (the pos
       attribute) and colors the edges in a manner making it easier to tell them apart.

OPTIONS

       The following options are supported:

       -accuracy=e
              accuracy with which to find the maximally different coloring  for  each  node  with
              regard to its neighbors. Default e = 0.01.

       -angle=a
              color  two  edges  differently  if  their  incidence  angle is less than a degrees.
              Default a=15.

       -random_seed=s
              random seed to use. s must be an integer. If s is negative, we  do  |s|  iterations
              with different seeds and pick the best.

       -lightness=l1,l2j
              only  applies  for the "lab" color scheme: l1 and l2 must integers, with 0 <= l1 <=
              l2 <=100. By default, we use "0,70"

       -share_endpoint
              if this option is specified, edges that  shares  an  node  are  not  considered  in
              conflict  if  they  are close to parallel but are on the opposite sides of the node
              (around 180 degree).

       -o f   write output to file f (default: stdout).

       -color_scheme=c
              specifies the color scheme.  This can be  "rgb",  "gray",  "lab"  (default);  or  a
              comma-separated  list  of  RGB  colors  in  hex  (e.g.,  "#ff0000,#aabbed,#eeffaa")
              representing a palette; or  a  string  specifying  a  Brewer  color  scheme  (e.g.,
              "accent7"; see http://www.graphviz.org/content/color-names#brewer).

       -v     turns on verbose mode.

       -?     Print usage and exit.

BUGS

       At  present,  edgepaint  does  not  handle graphs with loops or directed multiedges. So, a
       graph with edges a -> b and b -> a is acceptable, but not if it has edges a -> b and a  ->
       b or a -- b and a -- b.

AUTHOR

       Yifan Hu <yifanhu@research.att.com>

SEE ALSO

       gvmap(1), sfdp(1), neato (1), dot(1)

                                         26 February 2014                              CLARIFY(1)