I just released the version 0.2. This version is even better than previous ones. This time, you can add not less than 3 sort of items (balls, sticks, pyramid), you can declare a bunch of opengl cameras to render the world, you can transform the points easily and the documentation is there (http://libgtk3dcanvas.sourceforge.net)...
Enjoy, Mt.
Now, the documentation is quite decent (I just need to understand how to add intro section), Ball is a subtype of item, most of the needed properties are declared, but I need to add the code to handle some of them. I think it's time to upload a binary...
I work on implementing all properties.
At least, I created the project on sourceforge.
I commited all my code, and even if the project is quite alpha, the demo works.
I'm now working on using properties to change all fields of the structures, and subtyping the different item class.