If anyone's interested in seeing the orbits of Comet Swift-Tuttle and its debris that forms the Perseid meteor shower, I made a webgl visualization here showing all the moving parts: http://www.ianww.com/meteor-showers/
One small remark - some of the meteors/perseids should lose their orbit and disappear when they enter some planets atmosphere, but they are constantly produced by the comet anyway. Might be good idea to also add the comet itself?