[ODE] Ray-Trimesh normal reversed

[Antonio Tejada Lacaci]

On Tue, 15 Jul 2003 12:43:11 +0200, Joe Ante wrote:

If I were you, I would check ODE's axis handedness vs. your coordinate
system handedness. ODE uses a right handed coordinate system (i.e. a
system where the cross product follows the right hand rule). OpenGL is
right-handed, DX is left-handed. This is most noticeable on cross
products and when rotating vectors/points or taking angles between
vectors.

>Hi,
>
>I am using the ode ray code to do raycasting  and the contact normal - which
>according to the docs should hold the normal of the surface at the impact
>point- seems to be inversed.
>
>dCROSS(Contact->normal, =, vv, vu);    // Reversed
>When changing to:
>dCROSS(Contact->normal, =, vu, vv);
>
>The normal seems to be correct.
>
>Joe Ante
>
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Cheers!

Antonio Tejada Lacaci