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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-26 16:38:00 -0400
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-.TH GRAPHDRAW 9.1
-.CT 1 editor graphics
-.SH NAME
-graphdraw graphpic \- edit (combinatoric) graphs, convert to pic files
-.SH SYNOPSIS
-.B graphdraw
-[
-.I file
-]
-.PP
-.B graphpic
-[
-.I option ...
-]
-.I file
-.SH DESCRIPTION
-.I Graphdraw
-interactively edits and displays undirected graphs, and can also be used
-to display real-time animation of algorithms.
-If a
-.I file
-is mentioned, the graph stored in that file is edited.
-.PP
-Click button 1 in command line (at bottom of window) to type in commands:
-.TP \w'\f5!\fI\ program\ file\ \ \fR'u
-.BI r " file"
-Read file and display graph.
-.PD0
-.TP
-.BI w " file"
-Write current graph to file.
-.TP
-.BI cd " directory"
-Change directory.
-.TP
-.BI ! " program file"
-Execute animation
-.I program
-with
-.I file
-as input.
-.TP
-.B q
-Quit.
-.PD
-.PP
-Button 3 gets a menu of actions, which are
-usually accomplished by pointing with button 1.
-The parenthesized equivalents in the following list are explained
-under `Algorithm animation'.
-.TP 0
-.B create vertex
-Vertex is placed where button 1 is clicked.
-.RB ( vc
-.IR "x y" )
-.PD 0
-.TP
-.B delete
-Delete selected vertex and associated edges.
-.RB ( vd
-.IR i )
-.TP
-.B move
-Selected vertex moves with mouse until button 1 is released.
-.RB ( vm
-.IR i )
-.TP
-.B copy
-Copy of selected vertex and associated edges moves with mouse.
-.RB ( vc
-.IR "i x y" )
-.TP
-.B create/delete edge
-Point to first endpoint and click button 1.
-Point to second endpoint and click button 1.
-Continue selecting second endpoints with button 1.
-To unselect first endpoint, click button 2.
-.RB ( ec
-.IB "i j " /
-.B ed
-.IR "i j" )
-.TP
-.B restart
-Click button 1 to clear screen and discard current graph.
-.RB ( pr )
-.TP
-.B standard window
-Restart and reshape window to standard size,
-in which the drawing area is square and as large as possible.
-.TP
-.B small/large/no grid
-Impose/remove visible grid to which all new coordinates will be rounded.
-.TP
-.B exit
-Click button 1 to confirm.
-.TP
-.B labels menu
-.RS
-.TP
-.B label vertex
-Select vertex with button 1.
-Current label appears on command line.
-To accept it, click button 1.
-Otherwise, type in new label and hit return.
-.RB ( vl
-.IR "i w" )
-.TP
-.B number vertices
-Vertex labels are set to the consecutive integers 1,2,...;
-this is the default.
-.RB ( vn )
-.TP
-.B label edge
-Default is
-.LR 1 .
-.RB ( el
-.IR "i j w" )
-.HP
-.B show/hide vertex labels
-.RB ( vs ,
-.BR vh )
-.HP
-.B show/hide edge labels
-.RB ( es ,
-.BR eh )
-.TP
-.B turn Euclidean edge labels on/off
-Distances are measured in pixels.
-.RB ( ee )
-.TP
-.B show/hide sum of edges
-.RE
-.TP
-.B graphics menu
-.RS
-.TP
-.B light/heavy/empty/full/invisible vertex
-Select style from menu with button 3; select vertices to change with button 1.
-The default is
-.LR light .
-.RB ( vg
-.IR "i c" )
-.HP
-.B light/heavy edge
-.RB ( eg
-.IR "i j c" )
-.RE
-.TP
-.B macros menu
-Arrange for sets of vertices to act together.
-Actions on any vertex in the set apply to the whole set.
-Copying duplicates edges internal to the set.
-Creating an edge between vertexes in two different sets
-creates edges from every vertex in one set to every
-vertex in the other (bipartite subgraph).
-.RS
-.TF unselect\ set
-.TP
-.B select set
-Sweep a rectangle around the set with button 1.
-Dissociate conflicting sets.
-.TP
-.B unselect set
-Dissociate set containing selected vertex.
-.TP
-.B shrink/expand set
-Selected set is shrunk/expanded about its center.
-.TP
-.B reshape set
-Selected set is redrawn in swept rectangle.
-.TP
-.B complete/disconnect subgraph
-Create/delete edges between every pair of vertices in a set.
-.RE
-.PP
-.I Graphpic
-is a filter which, when applied to a file in graphdraw format, outputs
-.I pic
-code for the graph.
-The options are:
-.TP
-.B -v
-Print vertex labels.
-.TP
-.B -e
-Print edge labels.
-.TP
-.B -i
-Optimize for imagen printer (default is d202).
-.PD
-.SS File format
-Graphs are stored as adjacency lists.
-.PP
-First line:
-.I n m t,
-where
-.I n
-is the number of vertices,
-.I m
-is the number of edges, and
-.I t
-is an optional graph type.
-The only legal type is the default type
-.B u
-(undirected).
-.PP
-For each vertex, an initial line:
-.I d w x y c,
-where
-.I d
-is the degree of the vertex,
-.I w
-is its label,
-.I x
-and
-.I y
-are its coordinates in the window, and
-.I c
-is an optional graphics code,
-.BR L =light
-(default),
-.BR H =heavy
-(circled dot),
-.BR F =full
-(large bullet),
-.BR E =empty
-(empty circle),
-.B I =invisible.
-Window coordinates will be scaled to fit when graph is read in.
-.PP
-After the initial line follow
-.I d
-lines for the vertex's edges:
-.I i w c,
-where
-.I i
-is the index (1 to
-.IR n)
-of the other endpoint,
-.I w
-is the edge label, and
-.I c
-is an optional graphics code,
-.B L
-or
-.BR H .
-.PD
-.SS Algorithm animation
-The typed command
-.BI ! "program file"
-causes the standard output of
-.I program
-to be captured by the host and
-interpreted as commands to
-.I graphdraw.
-The resulting movie
-can be killed or temporarily halted from the the terminal
-by clicking button 2 and choosing the desired option from the resulting menu.
-.PP
-Animation codes (defined parenthetically with menu items above)
-appear one per line.
-Their arguments are:
-.I i,
-index of a vertex (normally the
-.IR i th
-to be created);
-.I x, y,
-integer coordinates in the range 0 to
-.BR maxcoord ;
-.I w
-a label; or
-.I c,
-a graphic code.
-.PP
-Other animation codes are
-.PD0
-.TP \w'\f5pm\fI\ message\ \ \fR'u
-.BI pw " n"
-Change the value of
-.B maxcoord to
-.I n.
-Default is 10,000.
-.TP
-.BI vl " i w"
-Give vertex
-.I i
-the label
-.I w.
-.TP
-.BI pd " t"
-Delay program for
-.I t
-clicks of the 60Hz clock.
-.TP
-.B ps
-Halt program until user clicks button 2 to continue.
-.TP
-.BI pm " message"
-Print
-.I message
-on command line.
-.PD
-.SH SEE ALSO
-.IR dag (1),
-.IR pic (1)
-.SH BUGS
-It is impossible to move or reshape a
-.I graphdraw
-layer, except via
-.LR "standard window" .