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CaRMetal : The Libre Software For Dynamic Geometry

Traduction(s) de cet article : français
Intervenant(s) :Monique Gironce
Type d'événement :Conférence
Niveau :Débutant
Date :Vendredi 10 juillet 2009
Horaire :14h00
Durée :40 minutes
Langue :Français
Lieu :Salle E104 - Ireste


Monique Gironce


C.a.R. is a software for dynamic geometry being developed by René Grothmann since 1989.

René Grothmann, a professor of mathematics at the catholic university in Eichstätt (Germany), has built powerful and reliable algorithms that handle objects and geometric relations. This is why his software can create very complex geometric constructs.

In February 2006, Eric Hakenholz being disappointed that this superb work was using a somewhat austere user interface, took the sources from C.a.R. (under GNU-GPL license) and programed CaRMetal (http://db-maths.nuxit.net/CaRMetal/...).

Many new functionalities have been added to the original ones. From the GUI point of view, CaRMetal is following a very different path, based upon direct manipulation. Instead of pull-down menus or blocking dialog boxes, the tools are set into palettes and object inspectors.

Another original item is present : a macro-construction tool that is, at the same time, simple to use and powerful. The macros can then be recorded within libraries, managed in a very ergonomic way, much like Firefox bookmarks ! A very rich web site is available, with many examples and movie-tutorials : the learning curve is fast and easy "Simple things should be simple, complex things should be possible" (Alan Kay).

This is the spirit that governed Eric’s way of programming CaRMetal. It gives a very intuitive software from the very first use : students are delighted.

Finally, CaRMetal is meant for :
- young college students (probably the primary target of CaRMetal) and, of course, their teachers
- youngsters in primary school (provided that they work in restricted mode)
- high school students and university researchers ; the curious can have a look at Yves Martin’s works on non-Euclidean geometry and finished geometry (http://www.reunion.iufm.fr/Dep/math... par exemple)