> I'd expect if you could make a prim phantom *and* phsical it would basically > "fall off" the SIM. That is, since its affected by gravity but does not > register collisions nothing stops it from falling through the ground. So I > guess I still dont see a case where phantom *and* physical make sense...
Alternate gravity.... One could in principle imagine a physics engine that wasn't a uniform gravitational field (i.e. down everywhere), but say attracted towards a central source, or the result of mutual interactions of the objects. (The Newton physics engine plugin that I played with a year or so ago was like this. However, it didn't do collisions at all, so essentially everything was phantom.) In something like this, I could see somebody wanting something both phantom and physical. -- --Rob Knop E-mail: [email protected] Home Page: http://www.pobox.com/~rknop/ Blog: http://scientopia.org/blogs/galacticinteractions/
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