658b91d8aa
The CSequence frame-advance core (gaps G3/G4/G5/G6/G8/G9/G19), ACE-verified skeleton + retail constants + the P0-pinned leftover carry: - update_internal (0x005255d0): frame_number += framerate*dt; overshoot clamps to the RAW high/low frame with leftover-time computation + animDone; the pose/physics/hook triple fires for EVERY crossed integer frame (ascending fwd / descending rev, strict > < boundaries, NO epsilon, NO safety cap); AnimDone is a LIST-STRUCTURE gate (head != first_cyclic) queuing the global AnimDoneHook; iterative loop carries the leftover into the next node (P0 pin — a lag spike fast-forwards through multiple queued nodes in one tick). - advance_to_next_animation (0x005252b0): four pose ops per transition (subtract1 outgoing @ current frame + residual physics; step — fwd wraps to first_cyclic, REVERSE wraps to the LIST TAIL, asymmetric by design; reseed from the incoming direction-aware boundary; combine incoming + physics). Pose ops run in BOTH directions — ACE's framerate-sign gates are ACE-isms, decomp is unconditional modulo the degenerate-framerate guard. - update (0x00525b80): non-empty -> update_internal + apricot; empty + frame -> accumulated-physics free motion (G8). - execute_hooks (0x00524830): direction filter (Both or match) QUEUING into the IAnimHookQueue host seam (stands in for CPhysicsObj.anim_hooks + the AnimDoneHook singleton; drain placement moves in R6). Null part frame guarded (documented safe divergence vs retail's latent deref). - FrameOps.Combine/Subtract1: the AFrame pose composition (verified math from the pre-R1 port, now against DatReaderWriter Frame). 10 conformance tests: single-tick goldens, exact-integer boundary sit (the old #61 flash class), cyclic wrap without AnimDone, link->cycle fast-forward proving hook order (link hooks -> ANIMDONE -> cycle hooks) AND the carry, reverse descending hooks with the OOB high+1 start, reverse tail-wrap, zero-framerate physics-only, empty-list free motion, pos-frame root motion into the caller Frame, apricot trim via update. Full suite 3346 green. R1 remaining: P5 (adapter cutover — AnimationSequencer rehosted on the core, legacy epsilon/stale-head/safety-cap DELETED) + P6 (root-motion wiring + API narrowing). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
511 lines
20 KiB
C#
511 lines
20 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Numerics;
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using DatReaderWriter.DBObjs;
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using DatReaderWriter.Types;
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namespace AcDream.Core.Physics.Motion;
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/// <summary>
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/// R1-P4 host seam standing in for retail's <c>CPhysicsObj.anim_hooks</c>
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/// SmartArray + the global <c>AnimDoneHook</c> singleton
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/// (<c>add_anim_hook</c> 0x00514c20; <c>process_hooks</c> 0x00511550 drains
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/// once per physics tick — the drain point stays with the host until R6
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/// places it per retail's UpdateObjectInternal order).
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/// </summary>
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public interface IAnimHookQueue
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{
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/// <summary>Queue a matched AnimFrame hook (already direction-filtered
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/// by <c>execute_hooks</c>).</summary>
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void AddAnimHook(DatReaderWriter.Types.AnimationHook hook);
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/// <summary>Queue the global animation-done hook — retail's
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/// <c>AnimDoneHook::Execute → CPhysicsObj::Hook_AnimDone →
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/// CPartArray::AnimationDone(1)</c> chain (R2 consumes it as
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/// MotionDone).</summary>
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void AddAnimDoneHook();
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}
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/// <summary>
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/// R1-P2 — verbatim port of retail's <c>CSequence</c> container + list
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/// surgery (Phase R plan stage R1; oracle
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/// `docs/research/2026-07-02-r1-csequence/r1-csequence-decomp.md` §1-§17,
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/// §20, §24). The per-tick advance (`update`/`update_internal`/
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/// `apply_physics`/hook dispatch) lands in R1-P3/P4.
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///
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/// Structure: a doubly-linked animation-node list with two cursors —
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/// <see cref="CurrAnim"/> (the node currently playing) and
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/// <see cref="FirstCyclic"/> (where the looping tail begins; everything
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/// before it is one-shot "link" animation). Retail invariant (G10):
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/// <c>append_animation</c> slides <c>first_cyclic</c> to the JUST-APPENDED
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/// node on EVERY call — the cyclic tail is always exactly the last node
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/// appended so far.
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///
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/// Physics accumulators (<see cref="Velocity"/>/<see cref="Omega"/>) live on
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/// the SEQUENCE, not per node (G16); retail replaces them via
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/// <c>set_velocity/set_omega</c> and algebraically blends via
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/// <c>combine_physics/subtract_physics</c> (the R2 fast path's mechanism).
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///
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/// Divergence register (rows added with this commit):
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/// <list type="bullet">
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/// <item><c>frame_number</c> is x87 <c>long double</c> in retail
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/// (acclient.h:30747); C# <c>double</c> is the closest available (G15).</item>
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/// <item>The intrusive DLList is a managed <see cref="LinkedList{T}"/>;
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/// node identity semantics preserved via <see cref="LinkedListNode{T}"/>
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/// references.</item>
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/// </list>
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/// </summary>
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public sealed class CSequence
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{
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private readonly LinkedList<AnimSequenceNode> _animList = new(); // anim_list (DLList)
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private LinkedListNode<AnimSequenceNode>? _firstCyclic; // first_cyclic
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private LinkedListNode<AnimSequenceNode>? _currAnim; // curr_anim
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private readonly IAnimationLoader _loader;
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/// <summary>Fractional frame position within <see cref="CurrAnim"/>.
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/// Retail x87 long double → double (register row, G15).</summary>
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public double FrameNumber;
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/// <summary>Sequence root-motion velocity accumulator (body-local).</summary>
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public Vector3 Velocity;
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/// <summary>Sequence angular-velocity accumulator.</summary>
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public Vector3 Omega;
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/// <summary>Static pose used when no animation node is active
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/// (<c>placement_frame</c>, §16).</summary>
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public AnimationFrame? PlacementFrame { get; private set; }
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public uint PlacementFrameId { get; private set; }
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public CSequence(IAnimationLoader loader) => _loader = loader;
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// ── inspection surface (adapter + tests) ────────────────────────────
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public AnimSequenceNode? CurrAnim => _currAnim?.Value;
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public AnimSequenceNode? FirstCyclic => _firstCyclic?.Value;
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public int Count => _animList.Count;
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/// <summary><c>has_anims</c> (0x00524bd0).</summary>
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public bool HasAnims() => _animList.Count > 0;
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/// <summary>TEST SEAM: reposition curr_anim by list index (retail state
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/// reached via update_internal, which lands in P4).</summary>
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public void SetCurrAnimForTest(int index)
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{
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var n = _animList.First;
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for (int i = 0; i < index && n != null; i++) n = n.Next;
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_currAnim = n;
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}
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// ── append_animation (0x00525510, §24) ──────────────────────────────
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/// <summary>
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/// Append a MotionData anim entry. A node whose dat animation fails to
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/// resolve is discarded. <c>first_cyclic</c> slides to the appended
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/// node on EVERY call; <c>curr_anim</c> seeds to the head (with
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/// <c>frame_number = get_starting_frame()</c>) only when it was null.
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/// </summary>
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public void AppendAnimation(AnimData animData)
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{
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var node = new AnimSequenceNode(animData, _loader);
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if (!node.HasAnim)
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return; // retail deletes the node — discard
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_animList.AddLast(node);
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_firstCyclic = _animList.Last;
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if (_currAnim is null)
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{
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_currAnim = _animList.First;
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FrameNumber = _currAnim!.Value.GetStartingFrame();
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}
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}
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// ── clear family (§3-§5) ────────────────────────────────────────────
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/// <summary><c>clear</c> (0x005255b0): full wipe INCLUDING the placement
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/// fields — the raw body resets them (the "2-instruction clear" note in
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/// the gap map was wrong; raw decomp is authority).</summary>
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public void Clear()
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{
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ClearAnimations();
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ClearPhysics();
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PlacementFrame = null;
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PlacementFrameId = 0;
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}
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/// <summary><c>clear_animations</c> (0x00524dc0): delete every node,
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/// null both cursors, zero <c>frame_number</c>.</summary>
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public void ClearAnimations()
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{
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_animList.Clear();
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_firstCyclic = null;
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_currAnim = null;
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FrameNumber = 0.0;
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}
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/// <summary><c>clear_physics</c> (0x00524d50).</summary>
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public void ClearPhysics()
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{
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Velocity = Vector3.Zero;
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Omega = Vector3.Zero;
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}
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// ── remove family (§6-§8) ───────────────────────────────────────────
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/// <summary>
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/// <c>remove_cyclic_anims</c> (0x00524e40): delete <c>first_cyclic</c>
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/// → tail. A removed <c>curr_anim</c> snaps BACK to the previous node
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/// with <c>frame_number = prev.get_ending_frame()</c> (or 0.0 when the
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/// list emptied). Afterwards <c>first_cyclic</c> = new tail (or null).
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/// </summary>
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public void RemoveCyclicAnims()
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{
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var node = _firstCyclic;
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while (node is not null)
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{
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var next = node.Next;
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if (ReferenceEquals(_currAnim, node))
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{
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var prev = node.Previous;
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_currAnim = prev;
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FrameNumber = prev is null ? 0.0 : prev.Value.GetEndingFrame();
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}
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_animList.Remove(node);
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node = next;
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}
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_firstCyclic = _animList.Last;
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}
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/// <summary>
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/// <c>remove_link_animations(count)</c> (0x00524be0): delete up to
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/// <paramref name="count"/> predecessors of <c>first_cyclic</c>. A
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/// removed <c>curr_anim</c> snaps FORWARD to <c>first_cyclic</c> with
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/// <c>frame_number = get_starting_frame()</c>.
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/// </summary>
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public void RemoveLinkAnimations(int count)
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{
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for (int i = 0; i < count; i++)
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{
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var prev = _firstCyclic?.Previous;
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if (prev is null)
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break;
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if (ReferenceEquals(_currAnim, prev))
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{
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_currAnim = _firstCyclic;
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if (_firstCyclic is not null)
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FrameNumber = _firstCyclic.Value.GetStartingFrame();
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}
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_animList.Remove(prev);
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}
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}
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/// <summary><c>remove_all_link_animations</c> (0x00524ca0): loop until
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/// <c>first_cyclic</c> has no predecessor.</summary>
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public void RemoveAllLinkAnimations()
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{
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while (_firstCyclic?.Previous is not null)
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RemoveLinkAnimations(1);
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}
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/// <summary>
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/// <c>apricot</c> (0x00524b40; the PDB-verified retail name): trim
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/// consumed nodes from the head, bounded by BOTH <c>curr_anim</c>
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/// (stop — still live) and <c>first_cyclic</c> (defensive bound —
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/// never delete into the cyclic tail). Called after every update (§22).
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/// </summary>
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public void Apricot()
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{
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var head = _animList.First;
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if (head is null || ReferenceEquals(head, _currAnim))
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return;
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while (!ReferenceEquals(head, _firstCyclic))
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{
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_animList.Remove(head!);
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head = _animList.First;
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if (head is null || ReferenceEquals(head, _currAnim))
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break;
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}
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}
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// ── physics accumulators (§10-§13) ──────────────────────────────────
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public void SetVelocity(Vector3 v) => Velocity = v; // 0x00524880
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public void SetOmega(Vector3 w) => Omega = w; // 0x005248a0
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public void CombinePhysics(Vector3 v, Vector3 w) { Velocity += v; Omega += w; } // 0x005248c0
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public void SubtractPhysics(Vector3 v, Vector3 w) { Velocity -= v; Omega -= w; } // 0x00524900
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// ── multiply_cyclic_animation_fr (0x00524940, §14) ──────────────────
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/// <summary>
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/// Scale the framerate of every node from <c>first_cyclic</c> to the
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/// tail. Framerates ONLY (G13) — retail rescales the sequence
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/// velocity/omega separately via <c>change_cycle_speed</c>'s
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/// <c>subtract_motion</c>/<c>combine_motion</c> composite (R2).
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/// </summary>
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public void MultiplyCyclicAnimationFramerate(float factor)
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{
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for (var n = _firstCyclic; n is not null; n = n.Next)
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n.Value.MultiplyFramerate(factor);
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}
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// ── placement + accessors (§15-§17) ─────────────────────────────────
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/// <summary><c>set_placement_frame</c> (0x005249b0).</summary>
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public void SetPlacementFrame(AnimationFrame? frame, uint id)
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{
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PlacementFrame = frame;
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PlacementFrameId = id;
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}
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/// <summary><c>get_curr_animframe</c> (0x00524970): the floored current
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/// part frame, or the placement frame when no node is active.</summary>
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public AnimationFrame? GetCurrAnimframe()
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{
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if (_currAnim is null)
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return PlacementFrame;
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return _currAnim.Value.GetPartFrame((int)Math.Floor(FrameNumber));
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}
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/// <summary><c>get_curr_frame_number</c> (0x005249d0).</summary>
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public int GetCurrFrameNumber() => (int)Math.Floor(FrameNumber);
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// ── apply_physics (0x00524ab0, §19) ─────────────────────────────────
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/// <summary>
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/// Accumulated-physics root motion: advance <paramref name="frame"/> by
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/// <see cref="Velocity"/>/<see cref="Omega"/> over a signed quantum —
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/// MAGNITUDE from <paramref name="quantum"/>, SIGN from
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/// <paramref name="signSource"/> (retail copysign semantics; call sites
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/// pass 1/framerate as magnitude and the signed elapsed time as sign).
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/// </summary>
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public void ApplyPhysics(Frame frame, double quantum, double signSource)
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{
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double signed = Math.Abs(quantum);
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if (signSource < 0.0)
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signed = -signed;
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float sq = (float)signed;
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frame.Origin += Velocity * sq;
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FrameOps.Rotate(frame, Omega * sq);
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}
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// ── R1-P4: the frame-advance core ───────────────────────────────────
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/// <summary>Host hook queue (<c>hook_obj</c>); null = hooks dropped
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/// (objects without a physics host).</summary>
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public IAnimHookQueue? HookObj;
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/// <summary>
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/// <c>CSequence::update</c> (0x00525b80, §22): non-empty list →
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/// <see cref="UpdateInternal"/> then <see cref="Apricot"/>; empty list
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/// with a Frame → accumulated-physics free motion.
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/// </summary>
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public void Update(double timeElapsed, Frame? frame)
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{
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if (_animList.Count > 0 && _currAnim is not null)
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{
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UpdateInternal(timeElapsed, frame);
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Apricot();
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}
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else if (frame is not null)
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{
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ApplyPhysics(frame, timeElapsed, timeElapsed);
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}
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}
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/// <summary>
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/// <c>CSequence::update_internal</c> (0x005255d0, §21 — ACE-verified
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/// skeleton, P0-pins.md): advance <see cref="FrameNumber"/> by
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/// framerate·dt; on overshoot clamp to the RAW high/low frame, compute
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/// the leftover time, and mark animDone; fire the pose/physics/hook
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/// triple for EVERY crossed integer frame (ascending forward,
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/// descending reverse); queue the global AnimDoneHook when the list
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/// HEAD is no longer the cyclic tail (G5's structural gate); advance to
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/// the next node and LOOP with the carried leftover (P0 pin).
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/// Iterative (retail while-true), NO safety cap (G4), NO boundary
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/// epsilon (G1/G3).
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/// </summary>
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public void UpdateInternal(double timeElapsed, Frame? frame)
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{
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while (true)
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{
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if (_currAnim is null)
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return;
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var currAnim = _currAnim.Value;
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double framerate = currAnim.Framerate;
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double frametime = framerate * timeElapsed;
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int lastFrame = (int)Math.Floor(FrameNumber);
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FrameNumber += frametime;
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double frameTimeElapsed = 0.0;
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bool animDone = false;
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if (frametime > 0.0)
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{
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if (currAnim.HighFrame < Math.Floor(FrameNumber))
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{
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double frameOffset = FrameNumber - currAnim.HighFrame - 1.0;
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if (frameOffset < 0.0)
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frameOffset = 0.0;
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if (Math.Abs(framerate) > FrameOps.FEpsilon)
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frameTimeElapsed = frameOffset / framerate;
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FrameNumber = currAnim.HighFrame;
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animDone = true;
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}
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while (Math.Floor(FrameNumber) > lastFrame)
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{
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if (frame is not null)
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{
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var pos = currAnim.GetPosFrame(lastFrame);
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if (pos is not null)
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FrameOps.Combine(frame, pos);
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if (Math.Abs(framerate) > FrameOps.FEpsilon)
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ApplyPhysics(frame, 1.0 / framerate, timeElapsed);
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}
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ExecuteHooks(currAnim.GetPartFrame(lastFrame), +1);
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lastFrame++;
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}
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}
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else if (frametime < 0.0)
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{
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if (currAnim.LowFrame > Math.Floor(FrameNumber))
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{
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double frameOffset = FrameNumber - currAnim.LowFrame;
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if (frameOffset > 0.0)
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frameOffset = 0.0;
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if (Math.Abs(framerate) > FrameOps.FEpsilon)
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frameTimeElapsed = frameOffset / framerate;
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FrameNumber = currAnim.LowFrame;
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animDone = true;
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}
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while (Math.Floor(FrameNumber) < lastFrame)
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{
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if (frame is not null)
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{
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var pos = currAnim.GetPosFrame(lastFrame);
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if (pos is not null)
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FrameOps.Subtract1(frame, pos);
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if (Math.Abs(framerate) > FrameOps.FEpsilon)
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ApplyPhysics(frame, 1.0 / framerate, timeElapsed);
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}
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ExecuteHooks(currAnim.GetPartFrame(lastFrame), -1);
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lastFrame--;
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}
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}
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else
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{
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if (frame is not null && Math.Abs(timeElapsed) > FrameOps.FEpsilon)
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ApplyPhysics(frame, timeElapsed, timeElapsed);
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return;
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}
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if (!animDone)
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return;
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// AnimDone gate: a LIST-STRUCTURE test, not a node flag (G5) —
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// fire only when the consumed head is not already the cyclic
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// tail (retail 0x00525943-0x00525968).
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if (HookObj is not null
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&& _animList.First is not null
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&& !ReferenceEquals(_animList.First, _firstCyclic))
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{
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HookObj.AddAnimDoneHook();
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}
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AdvanceToNextAnimation(timeElapsed, frame);
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timeElapsed = frameTimeElapsed; // the P0-pinned leftover carry
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}
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}
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/// <summary>
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/// <c>CSequence::advance_to_next_animation</c> (0x005252b0, §23): four
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/// pose operations per transition — un-apply the outgoing node's pose
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/// (subtract1 + residual physics), step (forward wraps to
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/// <c>first_cyclic</c>; REVERSE wraps to the LIST TAIL — asymmetric by
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/// design), reseed <see cref="FrameNumber"/> from the incoming node's
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/// direction-aware boundary, apply the incoming pose (combine +
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/// physics). Pose ops run in BOTH directions (ACE's framerate-sign
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/// gates are ACE-isms; the decomp is unconditional apart from the
|
||
/// degenerate-framerate guard).
|
||
/// </summary>
|
||
public void AdvanceToNextAnimation(double timeElapsed, Frame? frame)
|
||
{
|
||
if (_currAnim is null)
|
||
return;
|
||
|
||
var outgoing = _currAnim.Value;
|
||
|
||
// (a) un-apply the outgoing node's pose at the CURRENT FrameNumber.
|
||
if (frame is not null && Math.Abs(outgoing.Framerate) >= FrameOps.FEpsilon)
|
||
{
|
||
var pos = outgoing.GetPosFrame((int)FrameNumber);
|
||
if (pos is not null)
|
||
FrameOps.Subtract1(frame, pos);
|
||
ApplyPhysics(frame, 1.0 / outgoing.Framerate, timeElapsed);
|
||
}
|
||
|
||
// (b) step; (c) reseed FrameNumber from the incoming boundary.
|
||
if (timeElapsed >= 0.0)
|
||
{
|
||
_currAnim = _currAnim.Next ?? _firstCyclic;
|
||
if (_currAnim is null)
|
||
return;
|
||
FrameNumber = _currAnim.Value.GetStartingFrame();
|
||
}
|
||
else
|
||
{
|
||
_currAnim = _currAnim.Previous ?? _animList.Last;
|
||
if (_currAnim is null)
|
||
return;
|
||
FrameNumber = _currAnim.Value.GetEndingFrame();
|
||
}
|
||
|
||
// (d) apply the incoming node's pose at the new FrameNumber.
|
||
var incoming = _currAnim.Value;
|
||
if (frame is not null && Math.Abs(incoming.Framerate) >= FrameOps.FEpsilon)
|
||
{
|
||
var pos = incoming.GetPosFrame((int)FrameNumber);
|
||
if (pos is not null)
|
||
FrameOps.Combine(frame, pos);
|
||
ApplyPhysics(frame, 1.0 / incoming.Framerate, timeElapsed);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// <c>CSequence::execute_hooks</c> (0x00524830, §18): QUEUE the part
|
||
/// frame's hooks whose direction is Both (0) or matches the playback
|
||
/// direction (+1 forward / −1 backward) into the host. Null part frame
|
||
/// guarded (retail has a latent null-deref here — documented safe
|
||
/// divergence, G18).
|
||
/// </summary>
|
||
private void ExecuteHooks(AnimationFrame? partFrame, int direction)
|
||
{
|
||
if (partFrame is null || HookObj is null)
|
||
return;
|
||
|
||
foreach (var hook in partFrame.Hooks)
|
||
{
|
||
if (hook is null)
|
||
continue;
|
||
int dir = (int)hook.Direction;
|
||
if (dir == 0 || dir == direction)
|
||
HookObj.AddAnimHook(hook);
|
||
}
|
||
}
|
||
|
||
// ── internal cursors for P4 (update_internal operates on nodes) ─────
|
||
|
||
internal LinkedListNode<AnimSequenceNode>? CurrAnimNode
|
||
{
|
||
get => _currAnim;
|
||
set => _currAnim = value;
|
||
}
|
||
|
||
internal LinkedListNode<AnimSequenceNode>? FirstCyclicNode => _firstCyclic;
|
||
internal LinkedList<AnimSequenceNode> AnimList => _animList;
|
||
}
|