plot.7

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th PLOT VII 2/25/75
.sh NAME
plot: openpl et al. \*- graphics interface
.sh SYNOPSIS
.nf
.ft B
openpl( )
.s3
erase( )
.s3
label(s)
char s[ ];
.s3
line(x1, y1, x2, y2)
.s3
circle(x, y, r)
.s3
arc(x, y, x0, y0, x1, y1)
.s3
dot(x, y, dx, n, pattern)
int pattern[ ];
.s3
move(x, y)
.s3
point(x, y)
.s3
linemod(s)
char s[ ];
.s3
space(x0, y0, x1, y1)
.s3
closepl( )
.fi
.s3
.ft R
.sh DESCRIPTION
These subroutines
generate
graphic output in a relatively
device-independent manner.
See
.it plot
(VI)
for a description
of the meaning of the subroutines.
.s3
There are four libraries containing these routines,
one that produces general graphics commands on the standard output,
and one each for the vt0 storage scope, the Diablo plotting
terminal and the Tektronix 4014 terminal.
.it Openpl
must be used before any of the others to open the
device for writing.
.it Closepl
flushes the output.
.sh FILES
/usr/lib/plot.a	produces output for plotting filters
.br
/usr/lib/vt0.a	produces output on vt0 storage scope
.br
/usr/lib/gsip.a	produces output on Diablo terminal
.br
/usr/lib/tek.a	produces output for the Tektronix 4014 terminal
.sh "SEE ALSO"
plot (VI), graph (VI)
.sh BUGS