[ODE] Re: Roller-coaster

[Geoff Carlton]

Also,
It may be easier to stomp the normals you get from ODE with your own 
ones (either flat face normals, or an interpolated normal), before you 
step the world.  I have found this solution is far better than allowing 
ODE to try to deduce its normal direction based on the proximity to the 
triangle edges.

Geoff

Aras Pranckevicius wrote:

>>That is a good idea, but realize its not just the normals that are used for
>>friction. When sliding an object over a triangle-mesh you might encounter
>>collisions with the 'internal edges', even when you discard friction. One
>>way to solve this is to handle this is to preprocess the mesh and 'remove'
>>the internal triangle-edges from collision detection. This requires some
>>non-trivial work.
>>    
>>
>
>AFAIK, there was a patch to unstable branch (done by Cyan guys?) that
>preprocesses trimeshes and marks "unnecessary" edges (ala GPG4
>article). I think it wasn't implemented in all colliders though.
>
>--
>Aras 'NeARAZ' Pranckevicius
>http://nesnausk.org/nearaz | http://nearaz.blogspot.com
>
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