#115 RigidBody.geometry is object/SFNode in JSON, should be array/MFNode.

[John W Carlson]

https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4.1-CD/Part01/components/rigidBodyPhysics.html#RigidBody

37.4.10 RigidBody
RigidBody : X3DNode, X3DBoundedObject {
[snip]
MFNode [in,out] geometry [] [X3DNBodyCollidableNode]
[snip]
}

https://www.web3d.org/x3d/content/examples/Basic/RigidBodyPhysics/UniversalJointExample.x3d

https://www.web3d.org/x3d/content/examples/Basic/RigidBodyPhysics/UniversalJointExample.json

Problematic area in JSON:

{ "RigidBody":
{
"@DEF":"BODY-2",
"@angularDampingFactor":0,
"@mass":0.1,
"@orientation":[0.0,0.0,1.0,0.7854],
"@position":[-0.35355,-0.35355,0.0],
"@useGlobalGravity":false,
"-geometry":
{ "CollidableShape":
{
"@USE":"BOX-GEOM-2"
}
}
}
}

            Proposed/Recommended fix:

             { "RigidBody":
              {
                "@DEF":"BODY-2",
                "@angularDampingFactor":0,
                "@mass":0.1,
                "@orientation":[0.0,0.0,1.0,0.7854],
                "@position":[-0.35355,-0.35355,0.0],
                "@useGlobalGravity":false,
                "-geometry":[
                  { "CollidableShape":
                    {
                      "@USE":"BOX-GEOM-2"
                    }
                  }
                  ]
              }
            }

            Note additional square brackets around CollidableShape object in fix.

            Even if the examples in the archive are bad, we still have to be concerned in JSON between an SFNOde (object) and MFNode (array).