On/Off Controller
Command entry:Main toolbar (Curve Editor (Open)) Select a track in the Track View hierarchy. Track View menu bar Controller menu Assign On/Off
Command entry:Graph Editors Track View - Curve Editor Select a track in the Track View hierarchy. Track View menu bar Controller menu Assign On/Off

The On/Off controller provides binary on and off control. It is similar to the Boolean Controller. For example, you can apply an On/Off controller to the Visibility track of an object.

You can view the curve for this controller in the Function Curve display, but it's not editable. In addition, there's no Properties dialog for this controller.


Example: To use the On/Off controller to control an object's visibility:

  1. Create a cylinder, then open Track View. From the Modes menu, choose Dope Sheet.
  2. In Track View, highlight the Cylinder track and click Tracks menu Visibility Track Add.

    Track View adds a Visibility track below the Cylinder track.

  3. Highlight the track named Visibility.
  4. From the Track View toolbar Controller menu Assign and select On/Off in the Assign Controller dialog. Click OK.

    The entire track region is filled by a blue bar. This means that Visibility is on throughout the animation.

  5. On the Track View toolbar, click (Insert Keys), and click the Visibility track around frame 20 (it doesn't have to be exact for this exercise).

    A new key appears where you clicked and the blue bar stops at the same frame.

  6. Insert another key near frame 60.

    The track is now blue again following frame 60.

  7. Insert additional keys in the Visibility Track. Each new key reverses the on/off blue pattern following the inserted key.
TipYou can select two or more keys and copy them to different positions. This allows you to create regular intervals for the On/Off effect.


You assign the On/Off Controller in Track View.

The On/Off track displays a solid blue color in frames that are On, and no color in frames that are Off. When you add a key to an On section of the track, the section following that key is off. When you add a key to an Off section, the following section is on and colored blue.

See Also