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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Qt OpenGL 3D Graphics</h1>
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| 33 |
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| 34 |
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| 35 | <p>
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| 36 | <p>
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| 37 | <p> <h2> Introduction
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| 38 | </h2>
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| 39 | <a name="1"></a><p> OpenGL is a standard API for rendering 3D graphics.
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| 40 | <p> OpenGL only deals with 3D rendering and provides little or no support
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| 41 | for GUI programming issues. The user interface for an
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| 42 | OpenGL<sup>*</sup> application must be created with another toolkit,
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| 43 | such as <a href="motif-extension.html#Motif">Motif</a> on the X platform, Microsoft Foundation Classes (MFC)
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| 44 | under Windows, or Qt on <em>both</em> platforms.
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| 45 | <p> The Qt OpenGL module makes it easy to use OpenGL in Qt applications.
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| 46 | It provides an OpenGL widget class that can be used just like any
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| 47 | other Qt widget, except that it opens an OpenGL display buffer where
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| 48 | you can use the OpenGL API to render the contents.
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| 49 | <p> The Qt OpenGL module is implemented as a platform-independent Qt/C++
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| 50 | wrapper around the platform-dependent GLX, WGL, or AGL C APIs. The
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| 51 | functionality provided is very similar to Mark Kilgard's GLUT library,
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| 52 | but with much more non-OpenGL-specific GUI functionality, i.e. the
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| 53 | whole Qt API.
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| 54 | <p> <h2> Installation
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| 55 | </h2>
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| 56 | <a name="2"></a><p> When you install Qt for X11, the configure script will autodetect if
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| 57 | OpenGL headers and libraries are installed on your system, and if so,
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| 58 | it will include the Qt OpenGL module in the Qt library. (If your
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| 59 | OpenGL headers or libraries are placed in a non-standard directory,
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| 60 | you may need to change the QMAKE_INCDIR_OPENGL and/or
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| 61 | QMAKE_LIBDIR_OPENGL in the config file for your system). Some
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| 62 | configurations require threading to be enabled for OpenGL, so if
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| 63 | OpenGL is not detected, try <tt>configure -thread</tt>.
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| 64 | <p> When you install Qt for Windows, the Qt OpenGL module is always
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| 65 | included.
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| 66 | <p> The Qt OpenGL module is not licensed for use with the Qt Professional
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| 67 | Edition. Consider upgrading to the Qt Enterprise Edition if you
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| 68 | require OpenGL support.
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| 69 | <p> Note about using Mesa on X11: Mesa versions earlier than 3.1 would use
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| 70 | the name "MesaGL" and "MesaGLU" for the libraries, instead of "GL" and
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| 71 | "GLU". If you want to use a pre-3.1 version of Mesa, you must change
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| 72 | the Makefiles to use these library names instead. The easiest way to
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| 73 | do this is to edit the QMAKE_LIBS_OPENGL line in the config file you
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| 74 | are using, changing "-lGL -lGLU" to "-lMesaGL -lMesaGLU"; then run
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| 75 | "configure" again.
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| 76 | <p> <h2> The <a href="qgl.html">QGL</a> Classes
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| 77 | </h2>
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| 78 | <a name="3"></a><p> The OpenGL support classes in Qt are:
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| 79 | <ul>
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| 80 | <li> <a href="qglwidget.html">QGLWidget</a>: An easy-to-use Qt
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| 81 | widget for rendering OpenGL scenes.
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| 82 | <li> <a href="qglcontext.html">QGLContext</a>: Encapsulates an OpenGL rendering context.
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| 83 | <li> <a href="qglformat.html">QGLFormat</a>: Specifies the
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| 84 | display format of a rendering context.
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| 85 | <li> <a href="qglcolormap.html">QGLColormap</a>: Handles indexed
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| 86 | colormaps in GL-index mode.
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| 87 | </ul>
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| 88 | <p> Many applications only need the high-level <a href="qglwidget.html">QGLWidget</a> class. The other
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| 89 | QGL classes provide advanced features. X11 users might like to read
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| 90 | the notes on <a href="opengl-x11-overlays.html">overlays</a>.
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| 91 | <p> See also the <a href="opengl-examples.html">OpenGL examples</a>.
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| 92 | <p> The QGL documentation assumes that you are familiar with OpenGL
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| 93 | programming. If you're new to the subject a good starting point is
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| 94 | <a href="http://www.opengl.org/">http://www.opengl.org/</a>.
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| 95 | <p> <sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the
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| 96 | United States and other countries.
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| 97 | <p>
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| 98 | <!-- eof -->
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| 99 | <p><address><hr><div align=center>
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| 101 | <td>Copyright © 2007
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| 102 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 103 | <td align=right><div align=right>Qt 3.3.8</div>
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