| Server IP : 195.201.23.43 / Your IP : 18.217.163.75 Web Server : Apache System : Linux webserver2.vercom.be 5.4.0-192-generic #212-Ubuntu SMP Fri Jul 5 09:47:39 UTC 2024 x86_64 User : kdecoratie ( 1041) PHP Version : 7.1.33-63+ubuntu20.04.1+deb.sury.org+1 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/share/doc/groff/html/ |
Upload File : |
<!-- Creator : groff version 1.22.4 -->
<!-- CreationDate: Sat Mar 21 12:27:30 2020 -->
<!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-5.html</title>
</head>
<hr>
[ <a href="pic-4.html">prev</a> | <a href="pic-6.html">next</a> | <a href="pic.html">top</a> ]
<hr>
<h2>5. Generalized Lines and Splines
<a name="5. Generalized Lines and Splines"></a>
</h2>
<h3>5.1. Diagonal Lines
<a name="5.1. Diagonal Lines"></a>
</h3>
<p style="margin-top: 1em">It is possible to specify
diagonal lines or arrows by adding multiple <b>up</b>,
<b>down</b>, <b>left</b>, and <b>right</b> modifiers to the
line object. Any of these can have a multiplier. To
understand the effects, think of the drawing area as being
gridded with standard-sized boxes.</p>
<p align="center" style="margin-top: 1em"><img src="img/pic14.png" alt="Image img/pic14.png"></p>
<p align="center" style="margin-top: 1em">Figure 5-1:
Diagonal arrows (dotted boxes show the implied 0.5-inch
grid)</p>
<h3>5.2. Multi-Segment Line Objects
<a name="5.2. Multi-Segment Line Objects"></a>
</h3>
<p style="margin-top: 1em">A “line” or
“arrow” object may actually be a path consisting
of any number of segments of varying lengths and directions.
To describe a path, connect several line or arrow commands
with the keyword <b>then</b>.</p>
<p align="center" style="margin-top: 1em"><img src="img/pic15.png" alt="Image img/pic15.png"></p>
<p align="center" style="margin-top: 1em">Figure 5-2:
<b>line right 1 then down .5 left 1 then right 1</b></p>
<p style="margin-top: 1em">If a path starts with
<b>then</b>, the first segment is assumed to be into the
current direction, using the default length.</p>
<h3>5.3. Spline Objects
<a name="5.3. Spline Objects"></a>
</h3>
<p style="margin-top: 1em">If you start a path with the
<b>spline</b> keyword, the path vertices are treated as
control points for a spline curve fit.</p>
<p align="center" style="margin-top: 1em"><img src="img/pic16.png" alt="Image img/pic16.png"></p>
<p align="center" style="margin-top: 1em">Figure 5-3:
<b>spline right 1 then down .5 left 1 then right 1</b></p>
<p style="margin-top: 1em">You can describe many
natural-looking but irregular curves this way. For
example:</p>
<p align="center" style="margin-top: 1em"><img src="img/pic17.png" alt="Image img/pic17.png"></p>
<p align="center">Figure 5-4: Two more spline examples</p>
<p style="margin-top: 1em">Note the arrow decorations.
Arrowheads can be applied naturally to any path-based
object, line or spline. We’ll see how in the next
section.</p>
<hr>
[ <a href="pic-4.html">prev</a> | <a href="pic-6.html">next</a> | <a href="pic.html">top</a> ]
<hr>
Private