3ds Max: Maxscript rotation woes...

Hey,


I'm working with linking paramaters and maxscript expression controllers not for the first time, but im still fairly new at it.


What I have is a "spine" object for a robot character, with a "bend" modifier on it. I want this to be affected by the rotation of a biped "spine" bone object.


I can manage this easily when the biped spine is replaced with a dummy that has a euler_XYZ rotation on it. I just use the x rotation (and convert it to degrees) as the angle parameter and it works great.


But the biped spine object only has one controller for all its transformations, called "spine". I assume this is biped's system...

This makes it impossible to acces the $spine.rotation.x attribute as I did with the dummy (it says it doesn't exist).


Does anyone know a workaround or solution for this??? It's really annoying me :annoyed:


to help visualise what i mean here is a simple screnshot, what i want to get is shown here as the z-rotation...