The Hierarchy of Parameters
The Avid editing application processes 3D effects parameters in a specific order. Knowing the order will help you understand why something looks a particular way or why an object behaves the way it does on a motion path.
The hierarchy of 3D effects parameters, and the relationships between them, are as follows:
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Parameters that are lower in the hierarchy, like Crop, are not affected
by parameters that are higher in the hierarchy, such as Rotation. In an
effect that has both rotation and cropping, for example, the same four
edges are always cropped the same way no matter what angle you have
selected for the rotation.
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Parameters that are higher in the hierarchy will always take into
account the parameters lower in the hierarchy when processing. For
example, before an object is rotated, the Avid editing application looks
to see where the object is positioned in the frame to display the correct
3D point of view with the new angle.
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You always end up with the same effect no matter the order in which
you change parameters. However, building an effect from the bottom
of the hierarchy up will be easier to control. If you rotate an object, for
example, and then move the axis (a lower parameter), your object
might jump off the screen. It would be better to move the axis first, and
then rotate the object.
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Parameters operate as 2D and 3D. All these choices affect the 3D path
of the object differently. Two-dimensional (2D) parameters, such as
Scaling, are lowest in the hierarchy and do not affect the path through
space. Three-dimensional (3D) parameters, such as Position, directly
affect the shape of the motion path.
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