[X3D-Ecosystem] Could an engineer look at this problem in Rigid Body Physics?

[John Carlson]

Okay, I have this, but I don't know where to go from here....Contacts? Get
rid of RigidBody and put CollidableShape under
CollisionCollection.collidables? DEF/USE CollidableShapes?

<RigidBodyCollection gravity="0 0 -9.81">
<CollisionCollection containerField="collider"
                     appliedParameters='"FRICTION_COEFFICIENT_1"
"SLIP_COEFFICIENTS"'>
</CollisionCollection>
<RigidBody DEF="RB_hanim_skin" containerField="bodies" mass="0"
fixed="true" useGlobalGravity="true" linearDampingFactor="0.6"
angularDampingFactor="0.8">
<CollidableShape containerField="geometry">
        <Shape USE="theSkin" containerField="shape"/>
</CollidableShape>
</RigidBody>
<RigidBody DEF="RB_Floor" mass="0" position="0 0 -0.05"
containerField="bodies">
<CollidableShape containerField="geometry"><Shape
containerField="shape"><Box size="10 10 0.1"/></Shape></CollidableShape>
</RigidBody>

On Tue, Feb 24, 2026 at 8:21 AM Holger Seelig <holger.seelig at yahoo.de>
wrote:

> Use:
>
> RigidBodyCollection {
>   collider CollisionCollection {
>     collidables [X3DNBodyCollidableNode, ...]
>   }
>   bodies [RigidBody, … ]
> }
>
> —
> Holger Seelig
> holger.seelig at yahoo.de
>
>
> Am 24.02.2026 um 15:15 schrieb John Carlson <yottzumm at gmail.com>:
>
> I took out containerField="collider"
>
> I don't see how CollisionCollection helps at all yet.  I've tried various
> permutations.  I guess it lets other nodes know what's going on
> parameterwise.  But If it's a child of RigidBodyCollection, should it be a
> parent of the RigidBodyCollection's children?
>
> John
>
> On Tue, Feb 24, 2026 at 7:47 AM Holger Seelig <holger.seelig at yahoo.de>
> wrote:
>
>> 1. There is a CollisionCollection within a Transform but
>> CollisionCollection has containerField `collider`, thus it will not appear
>> in the Transform.
>>
>> 2. There is a RigidBodyCollection within the CollisionCollection, but has
>> nothing to do there, it should be a child of a Transform or Group or so and
>> the CollisionCollection should be child of the RigidBodyCollection.
>>
>> That’s what I can say so far.
>>
>> Best regards,
>> Holger
>>
>> —
>> Holger Seelig
>> holger.seelig at yahoo.de
>>
>>
>> Am 24.02.2026 um 14:25 schrieb John Carlson via X3D-Ecosystem <
>> x3d-ecosystem at web3d.org>:
>>
>> I'm trying to prevent the poncho/chainmail from sliding down the body.
>>
>> I got as far as differential equations, springs and stuff.  I know a lot
>> more about light than rigid body stuff.  I know basic stuff like gravity
>> constants.
>>
>> I could try to get AI to help me.
>>
>> I haven't checked the syntax of this file.
>>
>> I recommend Sunrize.
>>
>> Would smaller and more spheres help?
>>
>> John
>> <hanim_rigidbody_chainmail.zip>--
>> X3D-Ecosystem mailing list
>> X3D-Ecosystem at web3d.org
>> http://web3d.org/mailman/listinfo/x3d-ecosystem_web3d.org
>>
>>
>>
>
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