j.foucher
9d281c2e03
Posture: animation compensation, emotion lip sync, head jump fixes
Feature 1 — AnimationCompensation: posture overrides head/neck orientation
while body animations still play. Extracts animation contribution vs
reference pose, Slerps toward identity proportionally to compensation.
Feature 2 — Emotion-aware lip sync: expression curves (smile, frown,
sneer) blend additively with facial emotion during speech. Shape curves
(jaw, tongue) remain 100% lip sync. EmotionExpressionBlend property
controls blend ratio (default 0.5).
Bug fixes — Head rotation 1-2 frame jump prevention:
- Keep last cached rotation when PostureComponent is momentarily invalid
- Normalize composed quaternion (TurnQuat * NodQuat)
- Clamp DeltaTime to 50ms to prevent FInterpTo spikes during GC
- Guard against double cascade overflow (body + eye) in same frame
- EnforceShortestPath dot-product check before all Slerp operations
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>