Yes,I can use expression controller to do that,and I use it before I ask this question ;-D
But it's not easy when I have a lot parameter need be convert...
So ... is that possible write some plugin or something for Zookeeper to do that ?
and I found if I link a value to script controller, it can only link to object, not a track or constant ,
I need to write X.value ( the Zookeeper's default variable ) in script to get the value , it's a little bad...
Any way,Zookeeper is rock ~