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<bold>DrGeo & DrGenius by OFSET</bold>



How Dr. Geo started, the little story



<bold>DrGeo & DrGenius - History (1)

</bold>

<underline>The first implementation - sept.1996 to Dec.1998</underline>


DOS implementation


Free development tools under DOS



<bold>DrGeo & DrGenius - History (2)

</bold>

<underline>Porting to GNU/Linux - Jan 1999</underline>


Why?


First port


Second port - choosing a toolkit


The free software community



<bold>DrGeo & DrGenius - History (3)

</bold>

<underline>The DrGenius project</underline>


Extending DrGeo with numeric feature


The merge with the Gnome Genius calculator


A team development



<bold>DrGeo - Features (1)

</bold>

<underline>Dr Geo Refer to Geometry Exploration Observatory</underline>


Interactive geometry under GTK


Intuitive interface


Small power requirement



<bold>DrGenius - Features (2)

</bold>

<underline>DrGenius Refer to Geometry Exploration and Numeric Intuitive User System</underline>


Gnome interface


Interactive geometry


Console calculator


The canvas, a function grapher



<bold>DrGenius - Features (3)

</bold>


GEL, Genius Extension Language


A math. lib. written in GEL


XML file format for session save


LaTex export filter



<bold>DrGenius - Features (4)

</bold>

<underline>The geometric engine</underline>


Geometric engine rewritten from scratch:
	  better code readability
	  more easy to extend and maintain




<bold>DrGenius - Features (5)

</bold>

<underline>The calculator</underline>


algebric notation


command line oriented


arbitrary precision integer, rational, complex, multiple precision floats


variables, functions


matrix support


GEL language




<bold>DrGenius - Features (6)

</bold>

<underline>GEL, the extension language</underline>


interpreted & procedural	


nice math. syntax:
     function f(x) = |x-5|		


used to write the Dr. Genius math. lib.




<bold>DrGenius - Features (7)

</bold>

<underline>The canvas</underline>


2D plotter, GTKPlot based


3D plotter




<bold>DrGenius - Features (8)

</bold>

<underline>Session file</underline>


Teacher can prepare session all in one XML file:


	geometric figures


	macro-construction


	canvas view


	GEL buffer



<bold>DrGenius - Road Map (1)

</bold>

Implementing printing services


Improving the geometric engine


Rewriting of the arithmetic core


More integration between the tools:
     the console as a central tool
     GEL as the glue language
     writing a geometric API




<bold>DrGenius - Road Map (2)

</bold>


Integration with Gnome2:
    using the new MDI interface


Implementing Corba & Bonobo services:
    exporting geometric view
    exporting services for other applications





<bold>DrGeo & Dr Genius - Benefice of free development (1)

</bold>

Community work


Code readability


Peer review


Learning from other code



<bold>DrGeo & Dr Genius - Benefice of free development (2)

</bold>

<underline>Education benefice</underline>


     Sharing tools of knowledge


     Localize when needed


     Deploy without license issue




<bold>DrGeo & Dr Genius - Benefice of free development (3)

</bold>

<underline>Meta learning, what your teacher didn't tell</underline>


     Learning from the source code


     Community development




<bold>OFSET - www.ofset.org

</bold>


Support free developemnt for education use



<bold>OFSET - www.ofset.org

</bold>

<italic>Organization for Free Software in Education & Teaching</italic>


<underline>What is it?</underline>


a not for profit french organization to promote the development of free edu soft



<bold>OFSET - www.ofset.org

</bold>

<italic>Organization for Free Software in Education & Teaching</italic>


<underline>Who is it?</underline>


George Lebl, president - Gnome hacker & Dr. Genius developer
Hilaire Fernandes, vice-president & secretary - Dr. Geo & Dr. Genius developer
Georges Ko, treasurer - developer
Laurent Gauthier, co-secretary - Dr. Genius developer




<bold>OFSET - Objectives (1)

</bold>

<underline>Promoting</underline>


development & port of free educational software under the Gnome desktop


i18n & l10n


free documentation for educational software



<bold>OFSET - Objectives (2)

</bold>

<underline>Compiling free edu soft</underline>	


package to ease deployment in Gnome


a community service		



<bold>OFSET - Objectives (3)

</bold>

<underline>Documenting Gnome RAD tools as Python + Glade + Libglade</underline>


to ease development under Gnome


to empower teacher



<bold>OFSET - The Charter

</bold>

to follow the GNU philosophy


to use only free development tools


to push Gnome as a desktop choice for schools to be coherent and consistent


to use RAD tool when possible



<bold>OFSET - Joining & helping

</bold>


becoming an active or adherent member
	 government
	 school institution
	 individual


developing free educational software for Gnome


fund to help free educational software project



<bold>OFSET - Development

</bold>

<underline>Development by founding members</underline>


Gnome


Dr. Genius


Dr. Geo


Gnome developer tutorial