one end is constrained to a stationary object, and the other end has a hydraulic pump to adjust to distance and its constrained to a moving object (which moves around) so basically i want to know how to rig the hinge thing as seen in the pic above.
Are you using maya? All you need to do is set up a few controls, a global, one for the rotation, and one for the pivot of the bluish top piece. Self group the controls to ensure that the get the proper inputs and make sure the pivots are where you want them. Then parent constrain the controls to the needed geometry. Then…