Tribblix: manual page: edgepaint.1

CLARIFY(1) User Commands CLARIFY(1)

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