The help card is confusing regarding the use of condir&condof. I'm trying to limit the axis of rotation on a contraint.

condir: Class-Point Type-Vector

If the number of constrained degrees of freedom is 1, this value defines the normal of a plane that the object can move along or rotate in. If the number of constrained degrees of freedom is 2, this value defines an axis that the object can move or rotate about.

condof:Class-Point Type-Int

Identifies the number of constrained degrees of freedom for an anchor (0 to 3).

I've taken the chain example scene: (…/examples/nodes/dop/constraintnetwork/Chains.otl)

and set s@constraint_type = “all” , as I want the position constraint as well, with just modifying the amount of rotation freedom.

I just cant seem to wrap my head around the help cards explanation though. condir looks up conof's integer value from 0-3? How does condir define the vector value with a conof's value of 0 or 3, as it only mentions 1 &2 ?

Lets just say I want the constraints to limit the rotations on the chain to 15 degrees in all axis, how would I go about write the condir and conof attributes, in a new wrangle node? Is there any examples with the proper use of these attributes?

Cheers

I am also looking for a clarification of those attributes.

Anyone?

without trying it looks pretty self explanatory
condof:
0 -> 0 axis constrained = free movement so it probably ignores condir
1 -> 1 axis constrained = free to move on the plane perpendicular to condir or rotate in
2 -> 2 axes constrained = free to move along or rotate about the condir axis
3 -> 3 axes constrained = not free at all = completely constrained

but I guess for your needs (15 degrees about any axis) you'll probably need to use Cone Twist Constraint Relationship and just drive it's parameters with corresponding prim attributes on your links

Thanks for the explanation but how do I use it with bullet? I tried to use it in a sop solver with the constraint network but it doesn't seem to work at all, maybe the question more like how do I use it than what it does.

Do you have an example?

Thanks.

Thanks Tomas,
That makes much more sense looking back on it.
ConeTwist constrain was what I was after, didn't end up using condir.
Cheers

If anyone is interested here is my messy scene, with bullet/conetwist:

Thanks for the file Alex it really helps a lot!