What I was thinking was evolving space travel. If it is a physics engine, could it evolve warp drive? Rockets? On Jan 16, 2014 4:27 AM, "Chris Warburton" <chriswa...@googlemail.com> wrote:
> John Carlson <yottz...@gmail.com> writes: > > > I'm not sure why evolving explosions is a bug. You just want to make > sure > > you survive afterwards. > > It's a great evolutionary strategy. There's no need to survive either; > the situation is basically "you will be killed in a few seconds, but the > quicker you move in that time, the greater the chance that I'll clone > you". Exploding doesn't affect their reproduction. > > The bug(s) is in the physics engine. It looks like it's naively > approximating Newtonian mechanics by integrating with a finite, constant > dt (rather than infinitesimal dt). This causes large errors in the > position of the creatures legs if they're moved fast enough, allowing > them to self-intersect. > > The collision-handling code is then moving these intersecting body parts > apart, which is effectively applying a huge force to them. These forces > are unbalanced, breaking Newton's third law, so there is a net force on > the creatures, which lets them levitate. > > If the collision-handler pushes apart one intersection but causes > another, the forces will build up. This rebounding allows the > collision-handler's hack to dominate the simulation and cause the > creatures to explode. > > Cheers, > Chris > _______________________________________________ > fonc mailing list > fonc@vpri.org > http://vpri.org/mailman/listinfo/fonc >
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