edit an expression after you’ve created it and closed the window,
you must know how to find the expression in the Expression
Editor. The next steps show how to find and edit the
expression. Specifically, you’ll change the expression to alter
how quickly the scaleY value changes.
To edit the expression
- To display the Expression Editor again,
> Animation Editors > Expression Editor.
- To find the expression, make sure the
Ball is selected. In the Attributes list of
the Expression Editor, select scaleY,
the attribute controlled by the expression.
If you don’t see the
scaleY attribute, scroll through the Attributes list
as necessary. You can also use the Select Filter menu
option to customize how you search for your expressions within the Expression
The expression you created
previously appears in the expression text field:
- Change the expression to this:
Ball.scaleY = time/5 + 1;
By dividing time by 5,
you’ll make the Y scaling increase one-fifth as fast as with the
previous version of the expression.
Note that you can use
the keyboard commands Ctrl-c (Windows and Linux) or Control-c (Mac
OS X), Ctrl-x or Control-x, and Ctrl-v or Control-v to copy, cut,
and paste text in the Expression Editor and elsewhere in Maya.
- Click Edit to update
the modified expression.
Clicking Edit does
the same action as clicking Create. Create exists
only for new expressions. Edit replaces Create when
you display an existing expression.
- Play the animation to see the results
of the new expression.
The sphere scales at
a slower rate than before.
- Stop the animation and go to the start
- At this point and in subsequent steps,
save the scene if you think you’ll want to examine it at a later