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feat(physics): R5-V4 behavioral slice — head stance dispatch (all mt) + #164 autonomy bit + mt-0 wire flags

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Three unpack_movement parity items (facade deferred per the handoff's
own optional clause — see r5-wiring-handoff §V4 status):

1. HEAD style-on-change (0x00524440 @00524502-0052452c): both GameWindow
   routing heads (remote + player) now dispatch DoMotion(style, ctor
   defaults) when the UM's stance differs from the interp's current
   style, BEFORE the movement-type routing — for EVERY type. Previously
   style applied only through the mt-0 funnel copy, so a chase/turn UM
   (mt 6-9) carrying a stance change started the move in the OLD stance
   (a monster charged in NonCombat posture until the next mt-0). The
   RetailObserverTraceConformanceTests exclusion note updated — the
   trace filter stays (head calls can't appear in a
   MoveToInterpretedState replay) but the production gap it pointed at
   is closed.

2. #164 (closes): the action-replay loop threads each action's autonomy
   into the dispatch params (Autonomous = the 0x1000 splice, raw
   305982) — replayed actions enter the interpreted actions list with
   their real autonomy instead of ctor-default false.

3. mt-0 wire flags consumed (UpdateMotion parsed them since R4-V3):
   0x1 StickToObject → CPhysicsObj::stick_to_object port (0x005127e0:
   resolve target, PartArray radii — 0 when shapeless, guid-as-is for
   acdream's flat entity table — → PositionManager.StickTo; unresolvable
   target → no stick), at BOTH case-0 tails in retail order
   (@00524583-0052458e: funnel apply → stick → longjump flag);
   0x2 StandingLongJump → Motion.StandingLongJump, UNCONDITIONAL write
   (absent flag clears — retail @0052458e). ServerMotionState gains the
   StandingLongJump field.

Conformance: ChaseArm_WithStanceChange_AppliesStanceBeforeTheChase
(harness mirrors the routing-head dispatch) +
Actions_ReplayCarriesAutonomyIntoTheInterpretedList. Suite 4041 green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Erik 2026-07-05 10:18:26 +02:00
parent 530453067a
commit f423884bd1
9 changed files with 213 additions and 20 deletions
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14
src/AcDream.Core.Net/Messages/CreateObject.cs
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@ -259,10 +259,16 @@ public static class CreateObject
// InterpretedMotionState::UnPack (r4-moveto-decomp.md §2f
// @0052455d: `if (header & 0x100) sticky_object_guid = read_dword()`
// — bit 0x100 of the combined header word is motionFlags byte1&0x1).
// Carried unconsumed until R5's PositionManager::StickTo body binds
// it; parsing it here just keeps the buffer cursor honest past this
// field (deliverable C — no behavior).
uint? StickyObjectGuid = null)
// R5-V4 consumes it: the GameWindow mt-0 tail routes it into
// CPhysicsObj::stick_to_object's port (target PartArray radii →
// PositionManager.StickTo — decomp 0x005127e0, call @00524589).
uint? StickyObjectGuid = null,
// R5-V4 (closes the "documented but NOT consumed" note in
// UpdateMotion.cs): motionFlags & 0x2 — retail `unpack_movement`
// case 0 writes it onto `motion_interpreter->standing_longjump`
// UNCONDITIONALLY (@0052458e: absent flag CLEARS it). Consumed at
// the GameWindow mt-0 tails (remote + player).
bool StandingLongJump = false)
{
/// <summary>
/// ACE/retail movement types 6 and 7 are server-controlled