Autodesk 12812-051462-9011 - 3DS MAX 9 COM LEGACY SLM, Help File, Page: 1120 / 2577

have three devices, one for each axis of rotation. On the other hand, a
controller for the radius of a cylinder would have only one device to
control the radius value.
2 Bind the devices in the Properties dialog for the track.
To specify a device:
1 Click the Properties button while the Rotation track is selected.
The Properties dialog for rotation motion capture includes three binding
buttons (one for each axis.)
2 Click the Y Rotation button. In the resulting dialog, choose Mouse Input
Device, and click OK.
The lower half of the Properties dialog display controls specific to the
new device. Assuming this is a segment that isn't attached to another
object, you want the horizontal mouse movement.
3 Under Mouse Input, choose Horizontal.
The Scale spinner lets you adjust the relative effect of the mouse
movement to the rotation. Flip reverses the rotational direction with
respect to the mouse movement.
Example: To set up the Joystick controller to move a Free camera:
You set up the Joystick controller to move a Free Camera around on the XY
plane. The Y movement of the joystick will affect the camera's forward and
backward movement, and the X movement of the joystick will rotate the
camera. You'll use Increment Based On Direction to allow the Y movement
to be local to the camera rather than to the world.
1 Create a Free camera in the Front viewport.
2 In Track View, assign a Rotation Motion Capture controller to the Rotation
track of the camera.
3 Right-click in the Rotation track to display the Motion Capture properties
dialog.
4 Click the button beside Z Rotation, and assign a Joystick Input Device.
5 Under Joystick Axis, choose the X option (if it's not already chosen).
6 Check Accumulate so that the rotation won't return to zero each time
you release the joystick.
Motion Capture Utility | 3801