[Bf-committers] Fwd: Cloth simulation for a robot

[Ronan Ducluzeau]

fmart, cloth simulation tries to respect collision settings defined for
cloth mesh but it does not overwrite colliders animation.
If there is no anticipated little gap between animated cubes, cloth mesh is
constrained to pass through one collider mesh.

So, in your blend, your boxes are animated too close to the floor and too
close to each other to avoid intersections with cloth.
Alex's solution should work if you give a negative strength value to Force
Fields.
A positive value is for a repulsion.


2014-03-28 13:13 GMT+01:00 joe <joeedh at gmail.com>:

> Google "exact-ccd" and "robert bridson."  I've attempted to add this code
> to Blender before, though it looks like it's since been removed
> (admittedly, it was an earlier version, less refined version of their
> library).  Here's a test YouTube video I did in 2011:
>
> https://www.youtube.com/watch?v=QBM3TBKO9w8
>
> Joe
>
>
> On Fri, Mar 28, 2014 at 4:34 AM, fmart <fmart at iri.upc.edu> wrote:
>
> > A 2014-03-28 03:51, Alex Fraser escrigué:
> > > On Thu, Mar 27, 2014 at 11:27 PM, fmart <fmart at iri.upc.edu> wrote:
> > >> I've tried to tune all the cloth modifier parameters and also the
> > >> collision modifier parameters of the box (of course, stickiness =
> > >> 0).
> > >> Besides, I've thought fill the box to make a solid object, but I
> > >> think
> > >> this is not possible in blender.
> > >
> > > I've come across this too. Perhaps we could add an option to Surface
> > > force fields to only apply the force in the direction of the face
> > > normal? That way you could make a solid shape that repels hair, cloth
> > > and particles that are inside it. For example, the force effector on
> > > the cube in this example [1] could always push outwards instead of
> > > trapping the cloth and particles inside.
> > >
> > > Alex
> > >
> > > [1] http://www.pasteall.org/blend/27960
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> >
> > Thank you for your answer. I've tried to apply force fields as you
> > said, but it doesn't work for me. I think the main problem is I'm not
> > just using gravity to change cloth, I try to manipulate it.
> >
> > For instance, I want to pick up a piece of cloth from a table, and then
> > drop it.[1] Once I drop the piece of cloth I don't get a very realistic
> > behavior.
> >
> > Does anyone know an alternative way to manipulate cloth in blender?
> > Perhaps, I'm trying to do something that is not possible.
> >
> > Thank you
> > Felip
> >
> > [1] http://www.pasteall.org/blend/27967
> >
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