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 Parent Mouth_Top to the head bone, and Mouth_Bottom to the bone at the chin.
Parent the jaw to the head and we're done with our skeleton building.
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Fig 5. Skeleton Hierarchy
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Step3. Driving the Bones.
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The joint chains are going to be controlled by clusters on a spline drawn along the lips.
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 Create a linear CV curve starting at the corner and ending at the middle by point snapping one vertex to each joint in the chain, giving you four curves in total.
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Name them after the joints you just drew them over i.e. RTcurve for the right top curve, etc.
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Figure 6. Lip Curve Clusters |
Create a cluster for each CV in the curve. I prefer avoiding tedious tasks unless I'm billing by the hour, so I use the script clusterIt.mel by Malcolm Wright to create all of the clusters. (In case you're wondering, yes I do use a lot of scripts by other people, yes I am a lazy mook, and no I don't feel THAT bad for mooching, but thanks for asking).
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Now that you have a full set of clusters, point constrain each joint to the cluster on top of it so when you're finished every lip joint is controlled by a cluster. It'll probably take you a few minutes, so I'll wait here 'til you're done. Finished? Good.
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