Yup Josh is correct, creating a vector is the way to go... The "slowing down" force you're talking about is friction (at least in physics). If you're interested in this kind of stuff, I highly recommend picking up a copy of Keith Peters book:
http://www.amazon.com/Foundation-Actionscript-3-0-Animation-Making/dp/1590597915/ref=sr_1_1?ie=UTF8&s=books&qid=1240464956&sr=8-1 Cheers, On Wed, Apr 22, 2009 at 9:19 PM, Josh McDonald <[email protected]>wrote: > > > That sort of thing (a vector) is easy, once you've determined the direction > in radians, and a speed. Let's call it pixels-per-frame, to make things > simple. Note that this is typed in gmail, and will need tweaks! > > accuratePositionX = x; > accuratePositionY = y; > > velocityX = Math.cos(direction) * initialVelocity; > velocityY = Math.sin(direction) * initialVelocity; > > //Do every frame: > function updatePosition():void > { > accuratePositionX += velocityX; > accuratePositionY += velocityY; > > x = Math.round(accuratePositionX); > y = Math.round(accuratePositionY); > > velocityX *= 0.9; > velocityY *= 0.9; > > if (velocityX < 0.05 && velocityX < 0.05) > stopTheAnimation(); > } > > Cheers, > -Josh > > 2009/4/23 flexaustin <[email protected]> > >> >> >> Does anyone know of a tutorial on actionscript and gravity. Not like >> dropping a ball, but like google maps where you drag an item and it keeps >> going in that direction but slowing down. So gravity in all directions >> something like a hockey puck. >> >> TIA >> >> > > > -- > "Therefore, send not to know For whom the bell tolls. It tolls for thee." > > Josh 'G-Funk' McDonald > - [email protected] > - http://twitter.com/sophistifunk > - http://flex.joshmcdonald.info/ > > > -- Cheers, Nate ---------------------------------------- http://blog.natebeck.net
