Simulating changes in gravity

[Damascus]

I was messing around with repeated prop forces when I discovered a way to easily simulate changing gravity on an object. Objects with reversed gravity will "fall" upward seamlessly, bouncing and rolling on the ceiling like they normally would on the floor. You can also still grab objects and throw them around, and I had a lot of fun lodging books on the undersides of tables.

AddTimer("AntiGravity", 0.0f, "AntiGravity");

void AntiGravity(string & asTimer)
{
AddPropForce("[ENTITY]", 0, F, 0, "world");
AddTimer(asTimer, 0.01f, "AntiGravity");
}

Formula for calculating Prop Force
M = Mass of Object
G = Gravity Multiplier (2 = double, 1 = normal, 0 = no gravity, -1 = reversed)

F = (1-G) x 9.81M

(Also, forgive me for being a nerd, but since the formula pretty much came out to be Newton's second law, that leads me to believe the game technically uses kg for it's mass units, and Newtons for it's PropForce units. Cool little tidbit.)