Result :

Step by step process for buildng the moving vector save from version 0.4.1 . Im sorry but this is not commented. And im an idiot the mouse pointer isnt shown. I know this is shit but thats the only thing close to a tutorial i have made so far. I think the project evolve too fast yet to make a serious one. Maybe this will help somebody courageous (or with a tons of time to loose) so im keeping it for now. I will do something better someday i promise!