Captured a live ACDREAM_PROBE_AUTOWALK trace double-clicking +Je from
~3.5m. Findings folded into the spec's State at design freeze section:
1. Wire parser is correct (matches ACE MoveToObject.Write +
MoveToParameters.Write byte-for-byte).
2. ACE sends mtRun=0.00. Not a parser bug — that's the wire value.
Retail's apply_run_to_command (0x00527BE0) fell back to the
player's own rate; our Slice 2 needs the same fallback chain.
3. Player position never changed during the entire trace — current
behavior is pure no-op on the inbound MoveToObject (literally
ignored, as our code at OnLiveMotionUpdated:3289 suggests).
4. ACE does NOT broadcast UpdatePosition for the local player during
auto-walk. Definitively kills Option C — nothing to blend with.
Local body must drive itself.
The trace validates the spec's Option A path. Slice 2 implementation
can proceed without further wire-format guessing.
Grounded the design in named-retail evidence. MovementManager::Perform
Movement at 0x00524440 case 6 (decomp lines 300628-300648) shows the
retail client's local-side dispatcher for inbound MoveToObject:
unpacks the wire, sets motion_interpreter->my_run_rate, calls
CPhysicsObj::MoveToObject on the LOCAL player's physics body. Same
code path retail used for every creature chasing the player.
Conclusion: Option A (run a local driver against the player's body)
is retail-faithful. Option C (server-position-blend) is a non-retail
shortcut and is now eliminated from consideration.
Re-scoped the spec into 4 slices:
1. ACDREAM_PROBE_AUTOWALK diagnostic baseline (~30 LOC)
2. PlayerMovementController.BeginServerAutoWalk + reuse of
RemoteMoveToDriver against the local player's body (~100 LOC)
3. Animation cycle selection during auto-walk (~20 LOC)
4. Local pickup-animation echo (closes#64, ~10 LOC)
Total ~160 LOC, no new files. All existing acdream infrastructure
(RemoteMoveToDriver, ServerControlledLocomotion, MotionState.MoveTo
Path parsing) is reused; the work is wiring it for _playerServerGuid
in addition to remote guids.
Captures the wire-format facts that are already parsed (MotionState.
IsServerControlledMoveTo + MoveToPath fields), the two gating sites
that drop the inbound MoveToObject for the local player today, and a
three-option solution space (run remote-driver locally, visual tween,
server-position-authoritative blend).
Recommendation: Option C first (smallest blast radius, single-commit
hotfix if ACE's UpdatePosition broadcast cadence is adequate); promote
to Option A only if the trace shows server broadcasts are too sparse
to render smoothly.
Explicitly does NOT implement yet. The 'walks then snaps back' visible
symptom is observed but the mechanism isn't characterized in detail —
the spec calls for a diagnostic-trace session first (ACDREAM_PROBE_
AUTOWALK env var, ~30 LOC) to capture exactly what ACE sends during a
failed auto-walk. The trace decides between Option C (sufficient
position broadcasts) and Option A (need to fill in per-tick locally).
#64 (local pickup animation) is flagged as likely-related — same
OnLiveMotionUpdated:3289 self-echo filter drops both. May fix in
the same B.6 work.
