Editing OpenGL Utility Toolkit (section)

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{{Infobox software
| name                   = OpenGL Utility Toolkit
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| screenshot             = Fenetre glut.png
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| author                 = 
| developer              = [[Mark Kilgard]]
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| operating system       = [[Cross-platform]]
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| genre                  = [[Application programming interface|API]]
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The '''OpenGL Utility Toolkit''' ('''GLUT''') is a [[library (computing)|library]] of utilities for [[OpenGL]] programs, which primarily perform system-level [[input/output|I/O]] with the host [[operating system]]. Functions performed include window definition, window control, and monitoring of [[Computer keyboard|keyboard]] and [[Computer mouse|mouse]] input. Routines for drawing a number of geometric primitives (both in solid and wireframe mode) are also provided, including [[cube (geometry)|cubes]], [[sphere]]s and the [[Utah teapot]]. GLUT also has some limited support for creating pop-up menus.

GLUT was written by [[Mark Kilgard|Mark J. Kilgard]], author of ''OpenGL Programming for the X Window System'' and ''The Cg Tutorial: The Definitive Guide to Programmable Real-Time Graphics'', while he was working for [[Silicon Graphics]] Inc.

The two aims of GLUT are to allow the creation of rather portable code between operating systems (GLUT is [[cross-platform]]) and to make learning OpenGL easier. Getting started with OpenGL programming while using GLUT often takes only a few lines of code and does not require knowledge of operating system–specific windowing [[application programming interface|APIs]].

All GLUT functions start with the <code>glut</code> prefix (for example, <code>glutPostRedisplay</code> marks the current window as needing to be redrawn).