User report from fix#3 visual verify (commit 2653b30):
- Forward Run↔Walk Shift toggle: WORKS now
- Strafe Shift toggle: no transition (was out of scope)
- "When I shift walk backwards, the retail char gets animated walking
slow forward but blipping backwards" — REGRESSION
Root cause of the backward regression: ACE encodes WalkBackward as
`WalkForward` motion with NEGATIVE speedMod (MovementData.cs:115
`interpState.ForwardSpeed *= -0.65f`). My fix#1's hysteresis branches
treated lowByte 0x05 / 0x07 as "forward" and computed positive speedMod
from horizSpeed, overwriting the negative sign. Result: animation
played forward-walk while body kept moving backward (the rubber-band).
Strafe gap: sidestep (low byte 0x0F / 0x10) wasn't in fix#1's scope,
so ApplyPlayerLocomotionRefinement returned early for sidestep cycles.
Retail does the same wire-silence on Shift toggle for sidestep, so
observer-side cycle refinement must also fire for it.
Fix:
- Probe `currentSign = sign(CurrentSpeedMod)` to detect backward direction
- For sidestep (lowByte 0x0F or 0x10): keep motion ID, refine
speedMod magnitude = horizSpeed / WalkAnimSpeed, preserve sign
- For backward (forward-class lowByte AND currentSign < 0): keep
WalkForward motion (per ACE encoding), refine magnitude, preserve
negative sign — no "RunBackward" motion exists, only |speedMod|
changes between Walk-back (~0.65) and Run-back (~1.91 = runRate × 0.65)
- Forward (currentSign >= 0): existing Walk↔Run hysteresis unchanged
Build clean. Diagnostics: [UPCYCLE_PLAYER] line still prints; the
new sidestep / backward branches use the same SetCycle call so
their decisions appear in [SCFULL] / [CURRNODE] for inspection.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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