Why Does My Rollercoaster Flip ? (see My Scene)
Hi all,
I need help too fix a problem. I try to make a simple rollercoaster but the cars always flip on the curve. I've got the same problem either when i use motion path or ik spline. It has something to do with the tangent of the curve. See my scene http://sauge1.free.fr/test.mb Of course with an ik spline you can use the "roll" attribute to fix the problem or the "twist" with motion path but i what i really wonder is if there is is a clean way to do it instead. A way with no flip to deal with. This problem always occurs when you want to make a motion path or ik spline with an "extreme" curve and i've never been able to fix it and nobody yet could tell me how. I know that i could use the pointOnSurface technique but it's not very handy for a rollercoaster for example. Moreover i'm sure there is a easiest way. Thanks a lot for your help. |
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