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| # libQGLViewer

## Presentation

libQGLViewer is a C++ library based on Qt that eases the creation of OpenGL 3D viewers.

It provides some of the typical 3D viewer functionalities, such as the possibility to move the camera using the mouse, which lacks in most of the other APIs. Other features include mouse manipulated frames, interpolated keyFrames, object selection, stereo display, screenshot saving and much more. It can be used by OpenGL beginners as well as to create complex applications, being fully customizable and easy to extend.

Based on the Qt toolkit, it compiles on any architecture (Unix-Linux, Mac, Windows). Full reference documentation and many examples are provided. libQGLViewer does not display 3D scenes in various formats, but it can be the base for the coding of such a viewer.

libQGLViewer uses dual licensing: it is freely available under the terms of the GNU-GPL license for open source software development, while commercial applications can apply for a commercial license.

## Getting started

- Download and install the library.
- Test the examples.
- Learn how to compile with libQGLViewer and write your first program.
- For better coding, discover the principles as well as the different features of the library.
- Get familiar with the default mouse behavior and the keyboard shortcuts.
- Read the general FAQ, the technical FAQ or send email if you have questions.

## Latest changes

Jan 22nd, 2015 Version 2.6.2 | Fix `qreal` issue in `Quaternion::FromRotationMatrix()`.
Jan 22nd, 2015 Version 2.6.1 | Bug fix in `Camera::pointUnderPixel()`.
Nov 17th, 2014 Version 2.6.0 | The entire API now consistently uses the `qreal` (i.e `double`) type for floating point numbers.

This project is referenced by the FSF, FreshMeat, Savannah, Freecode, Kde-apps and Qt-Apps.

Related pages : PyQGLViewer page (Python binding created by Frédéric Boudon), Yahoo Group.

Last modified on Wednesday, June 17, 2015.