Hi Raphaël,
Raphaël DUCOM wrote:
> Ok.
>
> Hello Dirk.
>
> Since a week, I start becoming mad with strange values from the
> IntersectAction::getNormal() method... It seem there is a bug, this
> method does'nt return the normal of the Hit triandle, but a vector
> which is the cross product of the ray direction and one once the edges
> of the triangle.
True.
> I think the return value should be qvec instead of pvec, but I'm not
> sure.. (see the above code)
Actually it's neither. ;)
> Instead, I'm using this code wich is not optimized but wirks great, so
> there should be a problem :
>
> TriangleIterator it(act->getHitObject());
> it.seek( act->getHitTriangle() );
> Vec3f v1 = it.getPosition(1)-it.getPosition(0);
> Vec3f v2 = it.getPosition(2)-it.getPosition(0);
> Vec3f norm = v1.cross(v2);
> norm.normalize();
Yup, that's the fix.
> So I think there is something.... or maybe we undersdant "Nomal" in a
> different way.
Nope, the definition is pretty clear, I don't think there is a way to
misinterpret that.
Thanks for the hint, fixed!
Dirk
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