Resolved Do i need to have avatar or animator controller for IK to work?

I have a rigged spider-like model with 4 legs and i am using 4 chain constraints for these legs to follow their targets but for some reason if i just move the body of the model, legs don't adjust properly, is it because i don't have avatar or animator controller?

 

Oh, actually i've found what the problem was. Apparently i needed to add a rig transfrom component to any object that i want to move like, in my case, body. I don't remember this being said in any tutorials though...