I am in fact begining my work to wrote a geogebra question type.
But don't hold your breath, it's just the begining.
I am currently just writting a text to decribe my thinking and request comments from other Moodle users.
As soon as this text is online I will post here.
In the meantime, thanks a lot for your exercise. It's just what I need now.
If others have examples of geogebra exercises (unfortunately some exercises are too complex to hope a computer can grade them !! so for this ones we will still have to use the essay question with a .ggb file attached) please can you share with me ?
Some precisions about the future question type
It will be for Moodle versions >= 2.1 (sorry I DID wrote questions for Moodle quiz versions before 2.1 so I DO know the difference and I will not backport it myself !!)
The student display will be just the applet and the standard(s) button(s) no text field, no typing, the student is asked by the question text to do something in the applet and it's the objects that he modified or created that are graded.
The difficult part (and the real challenge) is to design a good GUI for the question creation !!