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These functions generate graphics output for a set of output devices.
The format of the output is dependent upon which link editor option is
used when the program is compiled and linked (see Link Editor).
The term "current point" refers to the current setting for the x and y coordinates.
The arc() function specifies a circular arc. The
coordinates (x0, y0) specify the center of the arc. The coordinates (x1, y1) specify the starting
point of the arc. The coordinates (x2, y2) specify the end point of the circular arc.
The box() function specifies a rectangle with coordinates
(x0, y0), (x0, y1), (x1, y0), and (x1, y1). The current point is set to (x1, y1).
The circle() function specifies a circle with a
center at the coordinates (x, y) and a radius of r.
The closevt() and closepl()
functions flush the output.
The cont() function specifies a line beginning
at the current point and ending at the coordinates (x, y). The current point
is set to (x, y).
The erase() function starts another frame of output.
The label() function places the null terminated
string s so that the first character falls on
the current point. The string is then terminated by a NEWLINE character.
The line() function draws a line starting at the
coordinates (x0, y0) and ending at the coordinates (x1, y1). The current point is set to (x1, y1).
The linemod() function specifies the style for drawing
future lines. s may contain one of the following: dotted, solid, longdashed, shortdashed, or dotdashed.
The move() function sets the current point to the
coordinates (x, y).
The openpl() or openvt() function
must be called to open the device before any other plot
functions are called.
The point() function plots the point given by the
coordinates (x, y). The current point is set to (x, y).
The space() function specifies the size of the
plotting area. The plot will be reduced or enlarged as necessary to fit
the area specified. The coordinates (x0, y0) specify the lower left hand corner of the plotting
area. The coordinates (x1, y1) specify the upper right hand corner of the plotting
area.
Link Editor
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Various flavors of these functions exist for different output devices.
They are obtained by using the following ld(1) options:
- -lplot
- device-independent graphics stream
on standard output in the format described in plot(4B)
- -l300
-
GSI 300 terminal
- -l300s
-
GSI 300S terminal
- -l4014
- Tektronix
4014 terminal
- -l450
-
GSI 450 terminal
- -lvt0
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