2009

Interface on page 3159 Procedures on page 3156
The Expression controller lets you use mathematical expressions to control
the following animation aspects:
■ Object parameters such as length, width, and height
■ Transform and modifier values such as an object's position coordinates
You can constrain values by basing them on the controller values of other
objects in the scene.
An expression is a mathematical function that returns a value. 3ds Max
evaluates the expression once for each frame of an animation, generating
values that can change from frame to frame.
You can create and manage Expression controllers in
Track View on page 3503
and on the
Motion panel on page 7663. You can assign expressions to the
following kinds of scene elements:
ControllerScene element
Any numeric creation parameterCreation parameters
Position [X, Y, Z]
X Rotation
Transforms
Y Rotation
Z Rotation
Scale [X%, Y%, Z%]
Any numeric modifier parameter (including
creation parameters)
Modifiers
Colors [R, G, B]
Any numeric material parameter
Materials
Expression Controller | 3155