Can I Do Two-ways Expression Link

[iamkrerk]

I have to do some kind of two-ways expression.

My problem is
I have 2 objects named A and B.
And I want attribute of A and B have the same values whenever I set the attribute of A or B.

For Ex.
if I set attribute A.tx = 10, then B.tx change to 10 too.
when I change B.tx to 20, then A.tx =20 too.

Can I do this??

Thank you very much

[tussockyracer]

I was trying to do the same thing few days back .... u cant have a two way expression directly but the best thing for this job is to have scriptJob which u can trigger easily with attribute change
try this, its quite easy

[joojaa]

well the two way exprssion is possible. Its just that its impossible to key properly! Since thsi si realy a gui realm issue and not a dg thing, a scriptjob working on selection change is the sanest mel solution (theres a much better api trick available).

If you want to key the attruibute now or in any foreseeable future, you should set up a scriptjob that.

swaps any inbound connection to the currently used node

sconnets the output of this node to the other node in teh chain

On release connects the upsteream once again back

This ensures rudimenttary keyabiliy, however there still a probklem what if someone has both objects selected and changes teh value collectively. (maya does this, if you have two same namied channels and multislelect maya will change them all at once)

[iamkrerk]

Thank you everyone