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1.1 root 1: .\" @(#)plot.5 6.2 (Berkeley) 4/25/87
2: .\"
3: .TH PLOT 5 "April 25, 1987"
4: .AT 3
5: .SH NAME
6: plot \- graphics interface
7: .SH DESCRIPTION
8: Files of this format are produced by routines
9: described in
10: .IR plot (3X)
11: and
12: .IR plot (3F),
13: and are interpreted for various devices
14: by commands described in
15: .IR plot (1G).
16: A graphics file is a stream of plotting instructions.
17: Each instruction consists of an ASCII letter
18: usually followed by bytes of binary information.
19: The instructions are executed in order.
20: A point is designated by
21: four bytes representing
22: the
23: x and y
24: values;
25: each value
26: is a signed integer.
27: The last designated point in an
28: .B "l, m, n, a,"
29: or
30: .B p
31: instruction becomes the `current point'
32: for the next instruction.
33: The
34: .B a
35: and
36: .B c
37: instructions change the current point in a manner dependent
38: upon the specific device.
39: .PP
40: Each of the following descriptions begins with the name
41: of the corresponding routine in
42: .IR plot (3X).
43: .TP 3
44: .B m
45: move: The next four bytes give a new current point.
46: .TP 3
47: .B n
48: cont: Draw a line from the current point to
49: the point given by the next four bytes.
50: .TP 3
51: .B p
52: point: Plot the point given by the next four bytes.
53: .TP 3
54: .B l
55: line: Draw a line from the point given by the next
56: four bytes to the point given by the following four bytes.
57: .TP 3
58: .B t
59: label: Place the following ASCII string so that its
60: first character falls on the current point.
61: The string is terminated by a newline.
62: .TP 3
63: .B a
64: arc:
65: The first four bytes give the center, the next four give the
66: starting point,
67: and the last four give the end point of a circular arc.
68: The least significant coordinate of the end point is
69: used only to determine the quadrant.
70: The arc is drawn counter-clockwise.
71: .TP 3
72: .B c
73: circle:
74: The first four bytes give the center of the circle,
75: the next two the radius.
76: .TP 3
77: .B e
78: erase: Start another frame of output.
79: .TP 3
80: .B f
81: linemod: Take the following string, up to a newline,
82: as the style for drawing further lines.
83: The styles are
84: `dotted,'
85: `solid,' `longdashed,' `shortdashed,' and `dotdashed.'
86: Effective only in
87: .I plot 4014
88: and
89: .I plot ver.
90: .TP 3
91: .B s
92: space: The next four bytes give
93: the lower left corner of the plotting area;
94: the following four give the upper right corner.
95: The plot will be magnified or reduced to fit
96: the device as closely as possible.
97: .IP
98: Space settings that exactly fill the plotting area
99: with unity scaling appear below for
100: devices supported by the filters of
101: .IR plot (1G).
102: The upper limit is just outside the plotting area.
103: In every case the plotting area is taken to be square;
104: points outside may be displayable on
105: devices whose face isn't square.
106: .RS
107: .TP 10n
108: 4013
109: space(0, 0, 780, 780);
110: .br
111: .ns
112: .TP 10n
113: 4014
114: space(0, 0, 3120, 3120);
115: .br
116: .ns
117: .TP
118: ver
119: space(0, 0, 2048, 2048);
120: .br
121: .ns
122: .TP
123: 300, 300s
124: space(0, 0, 4096, 4096);
125: .br
126: .ns
127: .TP
128: 450
129: space(0, 0, 4096, 4096);
130: .RE
131: .SH "SEE ALSO"
132: plot(1G), plot(3X), plot(3F), graph(1G)
133: .SH BUGS
134: A \fIlabel\fP instruction immediately followed by a \fIcont\fP
135: instruction does the wrong thing on a 4014.
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