mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-11 16:49:16 +05:00
4033fac1b3
Found via `codespell -q 3 -S ./external_dependencies/pybind11 -L alledges,allright,ane,anormal,ans,apoints,ba,boxs,cancle,childs,co-ordinate,co-ordinates,daty,enty,filld,hel,identifyable,ist,linz,lod,ned,nd,selt,statics,suround,thev,thist,thisy,timere,upto,wel`
181 lines
5.4 KiB
HTML
181 lines
5.4 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
|
|
"http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- vi:set sw=2: -->
|
|
<!--
|
|
Copyright (C) 1996-2002 Brian Paul and Ben Bederson
|
|
Copyright (C) 2005-2009 Greg Couch
|
|
See the LICENSE file for copyright details.
|
|
-->
|
|
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
|
|
<title>Using the Togl Widget</title>
|
|
</head>
|
|
|
|
<body>
|
|
<script type="text/javascript" src="header.js"></script>
|
|
<script type="text/javascript">
|
|
NavigationBar();
|
|
</script>
|
|
|
|
<h1 align="center">Using the Togl Widget</h1>
|
|
|
|
<h2>Contents</h2>
|
|
<ul>
|
|
<li><a href="#using">Using Togl With Your Application</a>
|
|
<li><a href="#examples">Examples</a>
|
|
<li><a href="tclapi.html">Tcl API</a>
|
|
<li><a href="capi.html">C API</a>
|
|
</ul>
|
|
|
|
<hr>
|
|
|
|
<h2><a name="using">Using Togl With Your Application</a></h2>
|
|
|
|
<p>
|
|
First, double check that you have all of the
|
|
<a href="download.html#prereq">prerequisites</a>
|
|
and that you have
|
|
<a href="download.html#building">compiled and installed</a> Togl.
|
|
<p>
|
|
Then, Togl acts like any other extension package —
|
|
to load it, you use the Tcl <code>package</code> command:
|
|
<blockquote>
|
|
<code>package require Togl 2.0</code>
|
|
</blockquote>
|
|
After that, you can create a Togl widget just like any other Tk widget.
|
|
|
|
<h2><a name="examples">Examples</a></h2>
|
|
|
|
<p>
|
|
There are eight working examples:
|
|
|
|
<blockquote>
|
|
<table border="0">
|
|
<tr>
|
|
<td>double.tcl</td>
|
|
<td>— compares single vs double buffering with two Togl widgets</td>
|
|
</tr>
|
|
<tr>
|
|
<td>texture.tcl</td>
|
|
<td>— lets you play with texture mapping options</td>
|
|
</tr>
|
|
<tr>
|
|
<td>index.tcl</td>
|
|
<td>— example of using color index mode</td>
|
|
</tr>
|
|
<tr>
|
|
<td>overlay.tcl</td>
|
|
<td>— example of using overlay planes (requires overlay hardware)</td>
|
|
</tr>
|
|
<tr>
|
|
<td>stereo.tcl</td>
|
|
<td>— stereo example</td>
|
|
</tr>
|
|
<tr>
|
|
<td>gears.tcl</td>
|
|
<td>— spinning gears example</td>
|
|
</tr>
|
|
<tr>
|
|
<td>multisample.tcl</td>
|
|
<td>— multisampling example</td>
|
|
</tr>
|
|
<tr>
|
|
<td>pbuffer.tcl</td>
|
|
<td>— pbuffer (off-screen rendering) example</td>
|
|
</tr>
|
|
</table>
|
|
</blockquote>
|
|
|
|
<p>
|
|
Each example consists of two files: a Tcl script for the user interface,
|
|
and a Tcl C package that does the OpenGL drawing.
|
|
To compile the examples, type <code>make examples</code>
|
|
in the Togl source directory.
|
|
The C packages are compiled into shared libraries
|
|
that are loaded into the Tcl interpreter as Tcl/Tk-extensions.
|
|
The examples are started by running the corresponding Tcl script:
|
|
just type <code>./double.tcl</code>
|
|
(or <code>./texture.tcl</code> <i>etc.</i>)
|
|
or run under one of the Tcl interpreters, <i>i.e.</i>,
|
|
<code>tclsh</code> or <code>wish</code>.
|
|
For example:
|
|
<blockquote>
|
|
<code>tclsh84 double.tcl</code>
|
|
</blockquote>
|
|
|
|
<p>
|
|
Other examples that use Tcl for OpenGL drawing can be found in the
|
|
<a href="http://tcl3d.org/html/demos.html">Tcl3D demos</a>.
|
|
|
|
<h3><a name="callbacks">Togl callbacks</a></h3>
|
|
<p>
|
|
All of the examples have similar structure.
|
|
First they create the user interface with one or more Togl widgets.
|
|
Each Togl widget is configured with the desired pixel format
|
|
and several callback commands (not all are needed):
|
|
<table>
|
|
<tr>
|
|
<td><code>-createcommand</code></td>
|
|
<td>
|
|
Called when Togl widget is mapped —
|
|
when it is safe to initialize the OpenGL context.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>-reshapecommand</code></td>
|
|
<td>
|
|
Called when the Togl widget is resized —
|
|
when the OpenGL context's viewport needs to be changed.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>-displaycommand</code></td>
|
|
<td>
|
|
Called when the contents of the Togl widget needs to be redrawn.
|
|
Redraws are normally delayed to be when the Tcl event loop is idle
|
|
(see the togl widget's <code>postredisplay</code> command),
|
|
or as the result of an explicit call to the togl's widgets
|
|
<code>render</code> command.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>-destroycommand</code></td>
|
|
<td>
|
|
Called when the Togl widget is destroyed.
|
|
While OpenGL frees display lists and other resources,
|
|
sometimes there's some associated state that is no longer needed.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>-timercommand</code></td>
|
|
<td>
|
|
Called every <i>n</i> milliseconds
|
|
as given by the <code>-time</code> option.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>-overlaydisplaycommand</code></td>
|
|
<td>
|
|
Called when the overlay planes needs to be redrawn.
|
|
The overlay planes are created and reshaped
|
|
at the same time as the main OpenGL context.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
Typically, only <code>-createcommand</code>, <code>-reshapecommand</code>
|
|
and <code>-displaycommand</code> are used.
|
|
|
|
<hr>
|
|
<a href="http://sourceforge.net/projects/togl">
|
|
<img src="http://sflogo.sourceforge.net/sflogo.php?group_id=519&type=13" width="120" height="30" border="0" alt="Get Togl at SourceForge.net. Fast, secure and Free Open Source software downloads">
|
|
</a>
|
|
<a href="http://validator.w3.org/check?uri=referer">
|
|
<img src="http://www.w3.org/Icons/valid-html401-blue"
|
|
alt="Valid HTML 4.01 Transitional" height="31" width="88" border="0">
|
|
</a>
|
|
</body>
|
|
</html>
|