Hi , i  was wondering how can i get the x/y coordinate of a 3d object ?

if i have a group of 3d elements in my x/y/z  that were randomly placed how can i get the x/y cordiniates of each 3d element?


I would like to get the x/y cordinates in order to be able to save in an external file the positions of all elements so i can load it again in my app.


which should be the best way of doing this?


thanks


Seb.