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[Anton Gladky <question228778@xxxxxxxxxxxxxxxxxxxxx>]

Question #228778 on Yade changed:
https://answers.launchpad.net/yade/+question/228778

Anton Gladky proposed the following answer:
Please, open a bugreport. We should check first, how it influences
results.

Thanks,

Anton


2013/5/13 Kneib François <question228778@xxxxxxxxxxxxxxxxxxxxx>

> New question #228778 on Yade:
> https://answers.launchpad.net/yade/+question/228778
>
> Hi,
>
> I found something weird in the source code into
> Ig2_Facet_Sphere_ScGeom::go().
> Usually when there is a contact between a sphere and a surface (wall, box
> ...), the contact geometry contains radius1=radius2=rs. (assuming rs is the
> sphere radius). So the stiffnesses of the contact are computed like if
> there is two spheres having the same radius.
>
> In Ig2_Box_Sphere_ScGeom::go :
>           scm->radius1 = s->radius;
>           scm->radius2 = s->radius;
>
> In Ig2_Wall_Sphere_ScGeom::go :
>           ws->radius1=ws->radius2=radius;
>
> But into Ig2_Facet_Sphere_ScGeom::go, there is :
>           scm->radius1 = 2*sphereRadius;
>           scm->radius2 = sphereRadius;
>
> Don't you think this is a mistake ?
>
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