Question #702096 on Yade changed:
https://answers.launchpad.net/yade/+question/702096
Status: Answered => Open
xuanshenyu is still having a problem:
Hi, Jan
Thank you very much for your kind reply. I have understood several
questions above.
But I still have questions about the following functions.
1########ScGeom6D::go()########
bool Ig2_Sphere_Sphere_ScGeom6D::go(
const shared_ptr<Shape>& cm1,
const shared_ptr<Shape>& cm2,
const State& state1,
const State& state2,
const Vector3r& shift2,
const bool& force,
const shared_ptr<Interaction>& c)
{
bool isNew = !c->geom;
if (Ig2_Sphere_Sphere_ScGeom::go(cm1, cm2, state1, state2, shift2,
force, c)) { //the 3 DOFS from ScGeom are updated here
if (isNew) { //generate a 6DOF interaction from the 3DOF one
generated by Ig2_Sphere_Sphere_ScGeom
shared_ptr<ScGeom6D> sc(new ScGeom6D());
*(YADE_PTR_CAST<ScGeom>(sc)) =
*(YADE_PTR_CAST<ScGeom>(c->geom));
c->geom = sc;
}
if (updateRotations)
YADE_PTR_CAST<ScGeom6D>(c->geom)->precomputeRotations(state1, state2, isNew,
creep);
return true;
} else
return false;
}
##############
2#####ScGeom6D::goReverse()######
bool Ig2_Sphere_Sphere_ScGeom6D::goReverse(
const shared_ptr<Shape>& cm1,
const shared_ptr<Shape>& cm2,
const State& state1,
const State& state2,
const Vector3r& shift2,
const bool& force,
const shared_ptr<Interaction>& c)
{
return go(cm1, cm2, state2, state1, -shift2, force, c);
}
YADE_PLUGIN((Ig2_Sphere_Sphere_ScGeom6D));
} // namespace yade
##################
What do these the functions of go() and goReverse() do?
3#############
bool isNew = !c->geom;
what does this sentence mean?
##############
Shenyu
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