/usr/share/doc/groff-base/html/pic-4.html is in groff 1.22.3-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | <!-- Creator : groff version 1.22.3 -->
<!-- CreationDate: Tue Dec 13 13:06:22 2016 -->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta name="generator" content="groff -Thtml, see www.gnu.org">
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<meta name="Content-Style" content="text/css">
<style type="text/css">
p { margin-top: 0; margin-bottom: 0; vertical-align: top }
pre { margin-top: 0; margin-bottom: 0; vertical-align: top }
table { margin-top: 0; margin-bottom: 0; vertical-align: top }
h1 { text-align: center }
</style>
<title>pic-4.html</title>
</head>
<hr>
[ <a href="pic-3.html">prev</a> | <a href="pic-5.html">next</a> | <a href="pic.html">top</a> ]
<hr>
<h2>4. Sizes and Spacing
<a name="4. Sizes and Spacing"></a>
</h2>
<p style="margin-top: 1em">Sizes are specified in inches.
If you don’t like inches, it’s possible to set a
global style variable <b>scale</b> that changes the unit.
Setting <b>scale = 2.54</b> effectively changes the internal
unit to centimeters (all other size variable values are
scaled correspondingly).</p>
<h3>4.1. Default Sizes of Objects
<a name="4.1. Default Sizes of Objects"></a>
</h3>
<p style="margin-top: 1em">Here are the default sizes for
<b>pic</b> objects:</p>
<p align="center"><img src="img/pic8.png" alt="Image img/pic8.png"></p>
<p>The simplest way to think about these defaults is that
they make the other basic objects fit snugly into a
default-sized box.</p>
<p style="margin-top: 1em"><i>pic2plot</i>(1) does not
necessarily emit a physical inch for each virtual inch in
its drawing coordinate system. Instead, it draws on a canvas
8 virtual inches by 8 virtual inches wide. If its
output page size is “letter”, these virtual
inches will map to real ones. Specifying a different page
size (such as, say, “a4”) will scale virtual
inches so they are output as one eighth of the page width.
Also, <i>pic2plot</i>(1) centers all images by default,
though the <b>−n</b> option can be used to prevent
this.</p>
<h3>4.2. Objects Do Not Stretch!
<a name="4.2. Objects Do Not Stretch!"></a>
</h3>
<p style="margin-top: 1em">Text is rendered in the current
font with normal troff line spacing. Boxes, circles, and
ellipses do <i>not</i> automatically resize to fit enclosed
text. Thus, if you say <b>box "this text far too long
for a default box"</b> you’ll get this:</p>
<p align="center" style="margin-top: 1em"><img src="img/pic9.png" alt="Image img/pic9.png"></p>
<p align="center" style="margin-top: 1em">Figure 4-1: Boxes
do not automatically resize</p>
<p style="margin-top: 1em">which is probably not the effect
you want.</p>
<h3>4.3. Resizing Boxes
<a name="4.3. Resizing Boxes"></a>
</h3>
<p style="margin-top: 1em">To change the box size, you can
specify a box width with the “width”
modifier:</p>
<p align="center" style="margin-top: 1em"><img src="img/pic10.png" alt="Image img/pic10.png"></p>
<p align="center" style="margin-top: 1em">Figure 4-2:
Result of <b>box width 3</b></p>
<p style="margin-top: 1em">This modifier takes a dimension
in inches. There is also a “height” modifier
that changes a box’s height. The <b>width</b> keyword
may be abbreviated to <b>wid</b>; the <b>height</b> keyword
to <b>ht</b>.</p>
<h3>4.4. Resizing Other Object Types
<a name="4.4. Resizing Other Object Types"></a>
</h3>
<p style="margin-top: 1em">To change the size of a circle,
give it a <b>rad[ius]</b> or <b>diam[eter]</b> modifier;
this changes the radius or diameter of the circle, according
to the numeric argument that follows.</p>
<p align="center" style="margin-top: 1em"><img src="img/pic11.png" alt="Image img/pic11.png"></p>
<p align="center" style="margin-top: 1em">Figure 4-3:
Circles with increasing radii</p>
<p style="margin-top: 1em">The <b>move</b> command can also
take a dimension, which just tells it how many inches to
move in the current direction.</p>
<p style="margin-top: 1em">Ellipses are sized to fit in the
rectangular box defined by their axes, and can be resized
with <b>width</b> and <b>height</b> like boxes.</p>
<p style="margin-top: 1em">You can also change the radius
of curvature of an arc with <b>rad[ius]</b> (which specifies
the radius of the circle of which the arc is a segment).
Larger values yield flatter arcs.</p>
<p align="center" style="margin-top: 1em"><img src="img/pic12.png" alt="Image img/pic12.png"></p>
<p align="center" style="margin-top: 1em">Figure 4-4:
<b>arc rad</b> with increasing radii</p>
<p style="margin-top: 1em">Observe that because an arc is
defined as a quarter circle, increasing the radius also
increases the size of the arc’s bounding box.</p>
<h3>4.5. The ‘same’ Keyword
<a name="4.5. The ‘same’ Keyword"></a>
</h3>
<p style="margin-top: 1em">In place of a dimension
specification, you can use the keyword <b>same</b>. This
gives the object the same size as the previous one of its
type. As an example, the program</p>
<pre style="margin-left:10%; margin-top: 1em">.PS
box; box wid 1 ht 1; box same; box
.PE</pre>
<p style="margin-top: 1em">gives you</p>
<p align="center" style="margin-top: 1em"><img src="img/pic13.png" alt="Image img/pic13.png"></p>
<p align="center" style="margin-top: 1em">Figure 4-5: The
<b>same</b> keyword</p>
<hr>
[ <a href="pic-3.html">prev</a> | <a href="pic-5.html">next</a> | <a href="pic.html">top</a> ]
<hr>
|