Section 1 · User commands

edgepaint.1

Package: graphviz

CLARIFY

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
BUGS
AUTHOR
SEE ALSO

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,l2

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 share a 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 https://graphviz.org/doc/info/colors.html#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. Ports are ignored in this analysis, so having a.x -> b and a.y -> b is also not supported.

AUTHOR

Yifan Hu <yifanhu@yahoo.com>