How do the manifolds work for compound shapes?

[sphet]

I am trying to understand just how the manifolds are working with compound shapes. Is there one 4-point maximum manifold shared amongst all child shapes, or are there N manifolds, each 4 points maximum? I am trying to establish performance impact of a compound given that each new manifold has the potential of adding more rows to the solver.

Any insight would be helpful.

S

[Flix]

Is there one 4-point maximum manifold shared amongst all child shapes, or are there N manifolds, each 4 points maximum?

The second answer is the right one as far as I can understand. Don't know much about performance, but I guess that using compound shapes is slower, as long as contacts keep getting created/removed inside more than one of their child shapes.