Multi-target blending
- Interpolate between multiple key poses
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- Interesting for facial animation
- ex. 30% happy, 50% suprised, 20% tired
- - Per-vertex formulation \( \displaystyle p_i(t)=\sum_{k}^{N_{poses}}\omega_k(t) \, b_{ik}\)
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- - \(p_i\): \(i\)th deformed vertex coordinates
- - \(b_{ik}\): Initial \(i\)th vertex coordinates at pose \(k\)
- - \(w_{k}\): Interpolation weight for pose \(k\).
- - Matrix formulation \({\bf p}(t)=\mathrm{B}\,{\bf \omega}(t)\)
- Sometimes easier to control in adding "change of expression" instead of interpolating.
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- ex. Neutral + 20% happy smile + 30% surprised eyes
