Using XPresso to link the jaw to the Morph animation

In order to get our shark's jaws and mouth to move together, we need to…establish a relationship between the Morph slider and the rotation of the lower jaw.…The rotation of the lower jaw is going to be driven by the Morph slider.…Now in order to do that we're going to use something called XPresso.…XPresso is the node-based language for creating expressions inside of CINEMA 4D.…An expression is really just a relationship that's been established between…two or more parameters.…Now the shark file that we have here has the Morph tag on it.…I'm going to click on the Morph tag and just adjust this slider open and closed.…

You can se that we already have that morph working pretty well.…Now what I want to do is create relationship between this open slider here and…the rotation of the lower gum object.…So let's move the Morph slider to the open position and select the gum…object for the lower jaw.…Then I'm going to use the Rotate tool and just rotate it around the z-axis.…As I rotate it open here, you can see that it doesn't quite rotate into the…