>As you can see, the coordinates are not to screen scale and would need to >be scaled etc. Since all of this is vectors, and no bitmaps etc, would >you need gworlds? I would not have thought so. Hi John (BTW, is a John, just a jonathan who got cut short?) GWorlds is cosmetic. It's not about _needing_ the things, it's about what does the end result look like. If your users can bear things appearing in the screen, occasional flickers, that's fine, draw direct to the window. The advantage of GWorlds is that you do all your drawing and flickering where the user can't see it and then 'ZAP!' blow it onto the screen like magic. It is up to you. However, once you've got a taste for GWorlds, you'll realise just how much neater, and more professional, it looks and you won't want to go back. (Aside - I don't mean to be nasty or ironic when I say it's a choice (and ability) thing. When Matt B (Hi Matt!) released his first Mr Cat's Quest - i thought it was great - yeah it's flickery and and walked holes though some of Apple's HIG, but he did it and that was the important achievement. Now he's doing more stuff and that's great too. We all have to toddle, walk, then run before getting onto triathalons - and personally I'm still using a baby-trainer) As to the coords - I don't understand a thing but couldn't you shape then up and then send them to a FN that does something like this? CLEAR LOCAL MODE DIM FirstPt&;0, fV, fH DIM ScndPt&;0, sV, sH FN drawForJohn( FirstPt&, ScndPt&) LONG IF(( fV <> 0) AND( fH <> 0)) CALL MOVETO( fV,fH) END IF CALL LINETO( sV,sH) END FN You would have a FN that reads your data, puts it into point format and then calls the FN, which does the drawing. If the first point is empty, it just draws a line, else it does a move to the first point and then draws a line. HTH jonathan ------------------------------------------------------------- ! "format utile" studio de graphisme/graphic design studio ! ! 32 bd de Menilmontant, 75020 Paris, France ! ! phone +33 1 43 49 02 04 +++ fax +33 1 43 49 16 51 ! ------------------------------------------------------------- *** coming soon to a browser near you *** <http://www.cybercities.com/formatutile> -------------------------------------------------------------