P.S. In the simplest case, equal masses, just interchange the velocities of the two balls after the collision.
Proof: If one assumes that the solution is unique, and since interchanging the velocities conserves momentum and energy (for balls of equal mass), this solution is THE solution. Jim > Richard, > > Collision detection is the easier part. Just calculate the distance between > centers and, if it is greater than the sum of the radii (assuming they are > circular) you have a collision. > > The more difficult part is the physics, what happens after the collission. > Are they of equal mass and size? You need to conserve momentum and energy. > > To get started you may look at a pool game. See: > > http://jamesphurley.com/runrev.html > > and look for "Nine ball pool." > > You may want to also checkout "Bouncing ball tools" at the same site to see > how to work with collision with different shapes, and how to deal with > enclosures that are may be convex. > > Jim Hurley > > > > >> I'm working on a very simple iPad app where 4 large shapes randomly float >> around on the screen. What I'd like to do is have them be able to bounce >> off each other if they happen to touch. Are there any tutorial pages or >> sample stacks out there that anyone knows of that I could use as a starting >> point? I can do collision detection with intersect, but before I spend >> countless hours reinventing the wheel, I thought I'd ask. >> >> --- >> Richard MacLemale >> Music = >> http://www.richardmac.com >> >> Programming = >> http://www.macandchee.se > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
