After following the First Steps, you have a setup with a
left-right separated smiling shape (
AU12). If you take a closer look at
the deformation, you see that the vertices near the center of the lip don’t
move perfectly logical in every situation.
For these situations, the BCS allows you to manually model an individual left
and/or right shape. Typically, you model just the left shape and use
“Data Points->Mirror Unilateral Tweaks->Left to Right” in order to
mirror your manual tweaks over to the other sub-dataPoint.
This tutorial continues where the First Steps have left.
You can therefore open the scene
bcsSteps_finished.ma for starting
into this tutorial.
In the dataPoint list of the bcsUI, select the dataPoint
Do a “right-click->Edit Geometry->Left”. You will see the
automatically created left part of the
Move the vertices near the center of the lip to support the overall left
movement of the lip corner.
Instead of modeling the shape yourself, you can import the scene
bcsLeftRight_AU12L.ma to get an object
AU12Left that you can
connect to the left tweak geometry of the dataPoint. Delete your left
tweak object and with the
AU12Left object selected, do a “Data
Points->Connect Object->Left”. Be sure to use the “Left”
directly below the “Absolute” entry.
Delete the left tweak geometry object from the scene.
At the moment, only the left version of the dataPoint has the tweaks
applied. The next step will mirror these changes to the other part of the
With the dataPoint
AU12 still selected in the list, choose
“Data Points->Mirror Unilateral Tweaks->Left to Right”.
The finished scene can be found in
Please note that the BCS node only stores the difference between the
automatically created left (and right) version and the tweaks you’ve applied
manually. This means that the left and right version will change when you edit
the falloff curve or even model the complete dataPoint.