NOTEThe /10 factor in the expression prevents the camera from rotating
too far in either direction. You can experiment with different values to produce
the results you need.
11 In the Camera viewport, click the label and choose Views > Camera Driver.
12 Scrub the animation to observe the wiring effect.
As the steering wheel rotates, the camera viewpoint swivels in the wrong
direction.
13 In the Wiring Parameters dialog, add a negative operator in front of the
expression, so that it reads: -Z_Rotation/10, then click Update.
14 Close the Wiring Parameters dialog and scrub the animation again.
The rig is now complete. To view a version of the finished product, open
car_rig_final.max.
Summary
In this tutorial, you learned how to assign controllers to components of a
model, and use expressions to ensure the controllers animate the components
correctly. You also learned how to use Point helpers to animate a model along
a path and were shown how to rework the model hierarchy so that a child
object can respond to the animation of its parent.
Adding Sound Effects to Animation
In this tutorial, you have the scene of a World War One airfield somewhere
in the north of France. A biplane is poised for takeoff, but it has no sound.
Your task is to take a group of four .wav files and assemble them so that they
play back as the plane rolls down the runway and takes to the sky.
You will set up the audio files in your scene, then adjust the sync in the Dope
Sheet Editor.
Adding Sound Effects to Animation | 651
