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106 lines
4.8 KiB
106 lines
4.8 KiB
14 years ago
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<title>Qt OpenGL 3D Graphics</title>
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<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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<p>
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<p>
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<p> <h2> Introduction
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</h2>
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<a name="1"></a><p> OpenGL is a standard API for rendering 3D graphics.
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<p> OpenGL only deals with 3D rendering and provides little or no support
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for GUI programming issues. The user interface for an
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OpenGL<sup>*</sup> application must be created with another toolkit,
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such as <a href="motif-extension.html#Motif">Motif</a> on the X platform, Microsoft Foundation Classes (MFC)
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under Windows, or Qt on <em>both</em> platforms.
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<p> The Qt OpenGL module makes it easy to use OpenGL in Qt applications.
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It provides an OpenGL widget class that can be used just like any
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other Qt widget, except that it opens an OpenGL display buffer where
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you can use the OpenGL API to render the contents.
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<p> The Qt OpenGL module is implemented as a platform-independent Qt/C++
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wrapper around the platform-dependent GLX, WGL, or AGL C APIs. The
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functionality provided is very similar to Mark Kilgard's GLUT library,
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but with much more non-OpenGL-specific GUI functionality, i.e. the
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whole Qt API.
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<p> <h2> Installation
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</h2>
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<a name="2"></a><p> When you install Qt for X11, the configure script will autodetect if
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OpenGL headers and libraries are installed on your system, and if so,
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it will include the Qt OpenGL module in the Qt library. (If your
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OpenGL headers or libraries are placed in a non-standard directory,
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you may need to change the QMAKE_INCDIR_OPENGL and/or
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QMAKE_LIBDIR_OPENGL in the config file for your system). Some
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configurations require threading to be enabled for OpenGL, so if
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OpenGL is not detected, try <tt>configure -thread</tt>.
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<p> When you install Qt for Windows, the Qt OpenGL module is always
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included.
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<p> The Qt OpenGL module is not licensed for use with the Qt Professional
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Edition. Consider upgrading to the Qt Enterprise Edition if you
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require OpenGL support.
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<p> Note about using Mesa on X11: Mesa versions earlier than 3.1 would use
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the name "MesaGL" and "MesaGLU" for the libraries, instead of "GL" and
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"GLU". If you want to use a pre-3.1 version of Mesa, you must change
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the Makefiles to use these library names instead. The easiest way to
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do this is to edit the QMAKE_LIBS_OPENGL line in the config file you
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are using, changing "-lGL -lGLU" to "-lMesaGL -lMesaGLU"; then run
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"configure" again.
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<p> <h2> The <a href="qgl.html">QGL</a> Classes
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</h2>
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<a name="3"></a><p> The OpenGL support classes in Qt are:
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<ul>
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<li> <a href="qglwidget.html">QGLWidget</a>: An easy-to-use Qt
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widget for rendering OpenGL scenes.
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<li> <a href="qglcontext.html">QGLContext</a>: Encapsulates an OpenGL rendering context.
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<li> <a href="qglformat.html">QGLFormat</a>: Specifies the
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display format of a rendering context.
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<li> <a href="qglcolormap.html">QGLColormap</a>: Handles indexed
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colormaps in GL-index mode.
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</ul>
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<p> Many applications only need the high-level <a href="qglwidget.html">QGLWidget</a> class. The other
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QGL classes provide advanced features. X11 users might like to read
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the notes on <a href="opengl-x11-overlays.html">overlays</a>.
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<p> See also the <a href="opengl-examples.html">OpenGL examples</a>.
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<p> The QGL documentation assumes that you are familiar with OpenGL
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programming. If you're new to the subject a good starting point is
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<a href="http://www.opengl.org/">http://www.opengl.org/</a>.
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<p> <sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the
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United States and other countries.
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<p>
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<p><address><hr><div align=center>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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