Shared PbdParticleId's
When generating PbdParticleId's for a mesh they are generated per every vertex. When two things are attached such as a ligament to an organ its desirable to have one PbdParticleId shared between the two meshes.
This is not urgent as there are workarounds
- One can set the them equal after a physics update (effects solver results though).
- One can attach a distance constraint of 0 distance between them.
- One particle can easily be dropped for it to be "physically correct" but visual geometry is then mapped to this other particle. Resulting in bad visuals. If visual geometry is mapped to simulated this can be fixed though.