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<h1>QGLViewer features</h1>
Most of the viewer's functionalities are illustrated by an example, that is referenced by the
<img src="images/sphere.png" width="14" height="14" alt="sphere"/>
<h2>Main features</h2>
<ul>
<li>A camera trackball to easily move the camera is the scene (explorer or walk through mode)
<a href="examples/simpleViewer.html">
<img src="images/sphere.png" width="14"height="14" border="0" alt="simpleViewer example"/></a>
<a href="examples/callback.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="callback example"/></a></li>
<li>Definition of a intuitive world coordinates system (aka the openGL modelView matrix made easy)
<a href="examples/simpleViewer.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="simpleViewer example"/></a></li>
<li>Coordinate systems (and hence objects) can easily be moved with the mouse
<a href="examples/manipulatedFrame.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="manipulatedFrame example"/></a>
<a href="examples/luxo.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="luxo example"/></a></li>
<li>Hierarchical coordinate systems (frames), with functions to convert from a frame to any other
<a href="examples/luxo.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="luxo example"/></a>
<a href="examples/frameTransform.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="frameTransform example"/></a></li>
<li>KeyFrameInterpolator to animate those frames, and especially the camera
<a href="examples/keyFrames.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="keyFrames example"/></a>
<a href="examples/simpleViewer.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="simpleViewer example"/></a></li>
<li>Screenshot saving in different file formats (jpg, png, eps, bmp...)
<a href="examples/simpleViewer.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="simpleViewer example"/></a></li>
<li>Vectorial rendering of the scene for clean exports (eps, ps, xfig)
<a href="examples/simpleViewer.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="simpleViewer example"/></a></li>
<li>Complete and entirely customizable <a href="shortcuts.html">shortcuts</a> and <a href="mouse.html">mouse</a> behavior
<a href="examples/keyboardAndMouse.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="keyboardAndMouse example"/></a></li>
</ul>
<h2>and also...</h2>
<ul>
<li>Many simple <a href="examples/index.html">examples</a> illustrating the different functions
<a href="examples/index.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="List of examples"/></a></li>
<li>A complete reference <a href="refManual/hierarchy.html">documentation</a>
<a href="refManual/hierarchy.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="Reference documentation"/></a></li>
<li>Display of the frame rate, of a world axis, of a 2D grid and of camera paths, full screen display...
<a href="examples/simpleViewer.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="simpleViewer example"/></a></li>
<li>Easy drawing of text directly in screen coordinate system (2D overlay) or in 3D
<a href="examples/screenCoordSystem.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="screenCoordSystem example"/></a>
<a href="examples/draw3DText.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="draw3DText example"/></a></li>
<li>Extendable displacement constraints that can be applied on those frames
<a href="examples/constrainedFrame.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="constrainedFrame example"/></a>
<a href="examples/constrainedCamera.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="constrainedCamera example"/></a></li>
<li>Viewer state is saved and can be restored at each new start
<a href="examples/simpleViewer.html">
<img src="images/sphere.png" width="14"height="14" border="0" alt="simpleViewer example"/></a></li>
<li>A simplified drawing function can be provided to guarantee interactivity, even with large scenes
<a href="examples/fastDraw.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="fastDraw example"/></a></li>
<li>The possibility to mix 3D and 2D (with intuitive pixel coordinates) drawing
<a href="examples/screenCoordSystem.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="screenCoordSystem example"/></a></li>
<li>Possible animation of the scene at a given frame rate
<a href="examples/animation.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="animation example"/></a>
<a href="examples/spinningFrame.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="spinningFrame example"/></a></li>
<li>Stereo display (provided that your hardware supports it)
<a href="examples/stereoViewer.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="stereoViewer example"/></a></li>
<li>Robust implementation of the basic <code>Vec, Quaternion</code> and <code>Frame</code> classes
<a href="examples/frameTransform.html">
<img src="images/sphere.png" width="14" height="14" border="0" alt="frameTransform example"/></a></li>
<li>Customizable help window</li>
</ul>
<h2>Philosophy</h2>
Classical 3D viewer features are directly available, so that you can quickly start the development
of a new application, focussing on <i>what</i> is drawn instead of <i>how</i> to make the computer
draw it.
<br/>
All these functions are very easy to use in your application code. For instance,
if you find that you need to move an object of your scene with the mouse, at most 4 lines of code
need to be added.
<br/>
See the different <a href="examples/index.html">examples</a> to get an more precise idea.
<a href="mailto:Gilles.Debunne at imag dot fr?Subject=QGLViewer features">Send an email</a> if you think of
a new feature.
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<i>Last modified on Thursday, February 5, 2004.</i>
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