I'm using vellum pack to merge two vellum constraints then the vellum unpack and plugging that into the vellum solver. Although when I play the simulation I'm getting double object simulation as seen below ?

velum pack packs geo and corresponding constraint into a single primitive for convenience
it's output sort of represents prepped geo for simulation
if you merge 2 of those, you essentially get 2 geos

Therefore if I want to merge multiple vellum constraints, one cannot use a vellum package for a vellum constraint and merge; it's better to use two vellum constraints sop and stack them, or can I use the former method just in a different way ?

Yes, stacking vellum constraints nodes in a single chain is the way to go

In theory it's possible to merge 2 constraint streams if you rewire all vertices to just one set of points, and delete the other

tamte
In theory it's possible to merge 2 constraint streams if you rewire all vertices to just one set of points, and delete the other

It's not possible in practice ?

_Christopher_

tamte
In theory it's possible to merge 2 constraint streams if you rewire all vertices to just one set of points, and delete the other

It's not possible in practice ?

It probably is, I assume you can do it like that, I just haven't tried, so it's just a theory, but don't see why it wouldn't work

tamte

_Christopher_

tamte
In theory it's possible to merge 2 constraint streams if you rewire all vertices to just one set of points, and delete the other

It's not possible in practice ?

It probably is, I assume you can do it like that, I just haven't tried, so it's just a theory, but don't see why it wouldn't work

How would I do this as you mentioned ?

I just tried and it works as described

one possible issue is that Vellum Constraint can also alter the geometry output and modify attributes like pscale, mass, volume
so merging just constraint outputs will miss those
but to properly merge those may be tricky as you may not know which points were altered and if the change is desirable since geo points are shared among all constraints
but if your workflow assumes that pscale and mass will be properly set by the main stream then you may be mostly ok and then just identify whats missing as you go


that all being said threat this just as an interesting exercise rather than a workflow

Thanks, enumerate the points for both constraints then re-wiring worked.😉