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Hi, I'm a physics major and naturally I'm interested how they make the physics work in HL2 (and in videogames in general). [I truly fully understand why fluid-dynamics isn't in HL2, cause that thing is a bitch compared to friction, gravity, boyancy).

Ok, can somebody explain or post a link on how they emulate gravity in HL2 (there should be some links), what kind of system they use; ie: instead of composing the barrel of millions of atoms all excerting a force, do they just include a couple of point which are attracted to the ground.

Any help would be appreciated.

PS: I know this is nitpicking, but I'm curious.
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