This question may not be related directly to this Forum but probably somebody might have the knowledge to answer.
Please have a look at following site.
http://www.cut-the-knot.org/Curriculum/Geometry/Griffiths.shtml
It teaches geometry with animation embedded to drawing. You can drag points with small circles. Drawing and all related objects will change accordingly. This is very nice and fantastic looking from education stand point of view.
I want to build something similar. At first I thought it is possible to construct something similar with aid of “constrain” in AutoCAD but it is not easy.
I want to know in which programming language they are programmed. And where can I get related information (in beginner’s level) to start learning. Apparently it is java language as mentioned in index page but I am wondering how the author does it with java.