Hi guys, this is my first post here.

Welcome

Anyway, i have to do a little project to my college using xith, but i´m really noob about this engine.
Go through
http://www.xith.org/pages/documentation.html for fast start with Xith, and don't forget to check latest "Xith In Nutshell" (XIN) documentation. It is in "doc" directory in "xith-tk".
I have to do a chemistry laboratory and i don´t know what loader i use to make a closet wich the doors open by a click of the mouse.
First of all check the Models chapter in XIN for fast references and recommendation of what models is better to use and which of them support animation - this would be recent information.
I'll reccomend to have fast look through some older post here also, just to pick hints and ideas and get aware of possible problems:
http://www.java-gaming.org/forums/index.php?topic=8353.0 http://www.java-gaming.org/forums/index.php?topic=8766.0 http://www.java-gaming.org/forums/index.php?topic=10539.0 http://www.java-gaming.org/forums/index.php?topic=12914.0 http://www.java-gaming.org/forums/index.php?topic=13005.0 http://www.java-gaming.org/forums/index.php?topic=14263.0 http://www.java-gaming.org/forums/index.php?topic=3824.0 http://www.java-gaming.org/forums/index.php?topic=6316.0 http://www.java-gaming.org/forums/index.php?topic=6487.0 http://www.java-gaming.org/forums/index.php?topic=6976.0 I tryed with ASE but it didn´t work, cuz i´m having a little problem with how to get the shape of the doors so i can use picking on it.
Is ASE the easiest way for doingt it?
I didn't clearly get here... you mean that you actually can load ASE model and animate, but you can't isolate the "doors" only to "be listening" to your events (roughly saying..)? Is it?
Well, I don't have personaly much experience with animating, and other loaders appart from 3DS (which doesn't support animation anyhow), but you should be able to get name of the node you pick, and provided you knew the Shape3D name of the doors itself you should be fine. Have you tried Node.getName() method for nodes returned by picking?
I knew it was the problem with the getName method some time ago for the models loaded (not created) retuning an empty String, but I believe it was resolved.
See picking exapmles in Getting Started Guide and also in XIN, aren't they suitable for you?
And don't forget also you can selectively specify which nodes you want to be pickable and which not.
Bohdan.