> Only for relatively slow speeds.


Apparently I was misled in Physics class, or else I forgot about the
details. Sorry =)

> Also "0.9" is not really a constant, but should be a function of the mass
> of the object, its geometry and the time-interval of course.


Well, yeah, but I figured for the purposes of a POV-Ray animation, you could
just fudge the constant so that it looked alright. I rarely worry about the
actual calculation of constants in POV-Ray, I just use the ideas behind the
formulas. (For instance, for gravity, I just pull two objects towards each
other with force as a function of 1/r^2; I don't bother to calculate the
G*m*m to figure out what it should actually be. Rarely, at least.)

 - Slime
[ http://www.slimeland.com/ ]

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