Creating an Expression constraint

The Expression Constraint Settings pane lets you use a more mathematical, and less graphic, method of constraining objects.

To create an Expression constraint:

1. Drag the Expression constraint asset into the Viewer window from the Asset browser.

   The Navigator window displays the Expression Constraint Settings pane and a new folder named “Constraints” is added to the Scene browser.

2. Alt-drag assets and devices from the Viewer window and Scene browser into the Expressions pane.
3. An option appears asking you if you want to create the expression as a Sender or as a Receiver.
   

   Expression as a Sender or Receiver option

4. Select Sender to create the Expression as a Sender that transmits data.

   Each cell contains an object's property as shown in the following figure.

   
   NoteIf you select Receiver, you create the expression as a Receiver that is influenced by the data transmitted from the Sender.
5. Double-click a cell and type a value.
6. Right-click in the cell and select a new data type from the Data editor to change the cell to a vector or another numerical type.

   Edit a cell’s value by dragging left or right to increase or decrease the value.

For more information, see Setting basic constraint commands in the Root folder and Expression reference.

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