http://www.sohcahtoa.net/videos/amazinggrace.m1v

This roller coaster is called Amazing Grace.  It was designed by RiscIt, 
one of the admins of CoasterSims.com.  The actual track looks FAR better 
in No Limits, because he uses terrain and 3DS objects, both of which I 
have not implemented yet.  Also, the lack of supports kind of takes a 
bit away from the feel of the ride.

That said, this represents the fact that I've fixed my banking problem 
in that corkscrews and loops work (See my post on p.general), though 
loops with little lateral movement will show a glitch, which shows 
itself in one of the loops in this ride.

I need to change the method of interpolation though...through the 
corkscrews, the ride kind of wobbles because the interpolation is 
linear.  I know that No Limits uses some sort of bezier interpolation, 
but I'm not sure how exactly to implement it for banking.  I might 
settle for 3rd order b-spline interpolation.  While it may end up being 
very smooth, it won't be as accurate to the original track.

-DJ

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