# 2.11BSD#431 - /usr/man/cat3/circle.0

    PLOT(3X)	    UNIX Programmer's Manual		 PLOT(3X)

    NAME
         plot: openpl, erase, label, line, circle, arc, move, cont,
         point, linemod, space, closepl - graphics interface

    SYNOPSIS
         openpl()

         erase()

         label(s)
         char s[];

         line(x1, y1, x2, y2)

         circle(x, y, r)

         arc(x, y, x0, y0, x1, y1)

         move(x, y)

         cont(x, y)

         point(x, y)

         linemod(s)
         char s[];

         space(x0, y0, x1, y1)

         closepl()

    DESCRIPTION
         These subroutines generate graphic output in a relatively
         device-independent manner.  See plot(5) for a description of
         their effect.  Openpl must be used before any of the others
         to open the device for writing.  Closepl flushes the output.

         String arguments to label and linemod are null-terminated,
         and do not contain newlines.

         Various flavors of these functions exist for different out-
         put devices. They are obtained by the following ld(1)
         options:

         -lplot  device-independent graphics stream on standard out-
    	     put for plot(1) filters
         -l300   GSI 300 terminal
         -l300s  GSI 300S terminal
         -l450   GSI 450 terminal
         -l4013  Tektronix 4013 terminal
         -l4014  Tektronix 4014 and 4015 terminals with the Enhanced
    	     Graphics Module (Use -l4013 for 4014's or 4015's

    Printed 11/26/99	  May 15, 1986				1

    PLOT(3X)	    UNIX Programmer's Manual		 PLOT(3X)

    	     without the Enhanced Graphics Module)
         -lplotaed
    	     AED 512 color graphics terminal
         -lplotbg
    	     BBN bitgraph graphics terminal
         -lplotdumb
    	     Dumb terminals without cursor addressing or line
    	     printers
         -lplot  DEC Gigi terminals
         -lvt0   DEC vt100 terminals
         -lplot2648
    	     Hewlett Packard 2648 graphics terminal
         -lplot7221
    	     Hewlett Packard 7221 graphics terminal
         -lplotimagen
    	     Imagen laser printer (default 240 dots-per-inch
    	     resolution).

         On many devices, it is necessary to pause after erase(),
         otherwise plotting commands are lost.  The pause is normally
         done by the tty driver if at login time, tset found a df
         field in the termcap(5) entry for the terminal.  If a pause
         is needed but not automatically being generated, add
    	  flush(stdout);
    	  sleep(1);
         after each erase().

    SEE ALSO
         plot(5), plot(1G), plot(3F), graph(1G)

    Printed 11/26/99	  May 15, 1986				2

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