What is a bezier curve?

Both NL and HR's track layout systems are based on Bezier curves. What is a Bezier curve?

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Be polite and ignore the idiots. - rollergator
You must be this dumb to ride Viper. -SFGAdv.

From a quick search on msn.com...

http://www.moshplant.com/direct-or/bezier

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--George H
---Superman the ride...coming to a SF park near you soon...