acdream/docs/plans/2026-04-11-roadmap.md

acdream — strategic roadmap

Status: Living document. Updated 2026-04-11 after Phase 6, 7.1, 9.1, 9.2 landed. Purpose: One source of truth for where the project is and where it's going. Every observed defect or missing feature has a named phase that owns it; when something looks wrong in-game, look here to find the phase that'll address it. Implementation details live in per-phase specs under docs/superpowers/specs/, not in this file.

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Phases already shipped

Phase	What landed	Verification
1	Terrain rendering, plugin host scaffold	Visual ✓
2a	Static stabs/buildings (126 entities)	Visual ✓
2b	Textured 3×3 landblock grid + FlyCamera + IGameState	Visual ✓
2c	Procedural scenery (419 trees/rocks/bushes)	Visual ✓
2d	Interior EnvCell walker (475 static interior objects)	Visual ✓
3a/3b	Directional sun lighting + per-vertex terrain normals	Visual ✓
3c	Per-cell terrain texture blending (alpha atlas)	Visual ✓
4	Full UDP codec + handshake + character login + WorldSession	Live ✓
5	ObjDesc: AnimPartChange + TextureChanges + SubPalettes + ObjScale + Placement.Resting	Live ✓
6.1	Idle motion frame resolution (MotionResolver MVP)	Live ✓
6.2	Server-sent MovementData stance + forward command honored	Live ✓
6.3	Server-supplied MotionTableId override (fixes drudge statue)	Live ✓
6.4	Per-frame animation playback (breathing, idle cycles)	Live ✓
6.5	Slerp between keyframes for smooth animation	Live ✓
6.6	UpdateMotion (0xF74C) parser + dispatch to animation tick	Live ✓
6.7	UpdatePosition (0xF748) parser + position reseating	Live ✓
7.1	EnvCell room geometry — walls/floors/ceilings via CellStruct + Environment dats	Visual ✓
9.1	Translucent render pass (AlphaBlend / Additive / InvAlpha + per-kind blend funcs)	Visual ✓
9.2	Back-face culling in translucent pass (fixes lifestone crystal)	Visual ✓
A.1	Streaming landblock loader — runtime-configurable visible window (default 5×5, ACDREAM_STREAM_RADIUS), camera-centered offline / player-centered live, hysteresis-based unloads, pending-spawn list for late CreateObject events	Live ✓
A.2	Frustum culling — per-landblock AABB test (Gribb-Hartmann), terrain + static-mesh renderers skip culled landblocks, perf overlay in window title	Visual ✓
A.3	Background net receive thread — dedicated daemon thread buffers UDP into Channel, render thread drains	Visual ✓
B.3	Physics collision engine — TerrainSurface (heightmap Z), CellSurface (indoor floor polygon projection), PhysicsEngine (resolver with step-height + cell transitions). Populated from streaming pipeline.	Tests ✓
B.2	Player movement mode — Tab-toggled WASD ground walking, walk/run/idle animations, third-person chase camera, MoveToState + AutonomousPosition outbound, portal entry. Outdoor-only MVP.	Live ✓
D.1	2D ortho overlay + font rendering (StbTrueTypeSharp atlas + TextRenderer + DebugOverlay)	Visual ✓
E.1	Motion-hook expansion — AnimationSequencer fires all 27 hook types per crossed frame; PosFrames root motion + vel/omega exposure; IAnimationHookSink + AnimationHookRouter fan-out	Tests ✓
E.2	Audio engine — OpenAL 16-voice 3D pool with retail-faithful quieter-slot eviction, SoundTable cookbook (probability-weighted variant picking), Wave PCM decoder, AudioHookSink wiring	Tests ✓
E.3	Particle system (data layer) — ParticleSystem with 13 motion integrators, EmitterDescRegistry, ParticleHookSink wiring all CreateParticle / DestroyParticle / StopParticle hooks	Tests ✓
E.4	Combat notifications + outbound — AttackTargetRequest (0x0008), 7 combat notification parsers (Victim/Defender/Attacker/Evasion/AttackDone/UpdateHealth), CombatState per-entity health tracker	Tests ✓
E.5	Spell cast wire — CastSpellRequest targeted (0x004A) + untargeted (0x0048), Spellbook (learned spells + active-enchantment layers), 5 enchantment GameEvent parsers	Tests ✓
F.1	GameEvent (0xF7B0) envelope dispatcher — all 94 sub-opcodes routed, exception-isolated handler registry, unhandled-count diagnostic bag; 18 event-payload parsers	Tests ✓
F.2	Item model + Appraise — ItemRepository with move/equip/property events, AppraiseRequest (0x00C8), IdentifyObjectResponse header, WieldObject + InventoryPutObjInContainer	Tests ✓
G.1	Sky + day/night — DerethDateTime (retail-exact 7620-tick calendar + 16-hour names + PY year), SkyStateProvider (4-keyframe default with angular-wrap lerp), WorldTimeService (server-synced clock with real-time advance)	Tests ✓
G.2	Dynamic lighting (selection) — LightSource + LightManager with retail 8-light cap, range-squared with 1.1× slack, slot 0 reserved for Sun, OwnerId-keyed unregister	Tests ✓
H.1	Chat wire layer — Talk (0x0015) / Tell (0x005D) / ChatChannel (0x0147) outbound, HearSpeech (0x02BB local + 0x02BC ranged) inbound, ChatLog ring buffer with adapters for every chat source	Tests ✓
Glue	GameEventWiring.WireAll — single-call registration mapping parsed GameEvents → Core state classes (ChatLog, CombatState, Spellbook, ItemRepository); GameWindow exposes state classes + wires them to live session	Tests ✓

Plus polish that doesn't get its own phase number:

• FlyCamera default speed lowered + Shift-to-boost
• SurfaceDecoder: PFID_P8 / PFID_R8G8B8 / PFID_X8R8G8B8 decoders
• GfxObjMesh: emit both pos and neg sides of double-sided polygons
• EnvCell mesh Z-lift to fix ground-floor / terrain flicker

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Phases ahead — agreed order

Phase A — Foundation (in progress)

Goal: walk across 10+ landblocks without crashes, without hitches at landblock boundaries, and without framerate cratering.

Sub-pieces:

• ✓ SHIPPED — A.1 — Streaming landblock loader. Runtime-configurable visible window (default 5×5, ACDREAM_STREAM_RADIUS env var override). Center follows the fly camera offline and the server-sent player position in live mode. Currently runs synchronously on the render thread — the original async-worker design hit DatCollection's lack of thread safety and was reverted for correctness. The Channel-based outbox API is preserved so async loading can return cleanly when Phase A.3 introduces a thread-safe dat wrapper. Pending-spawn list in GpuWorldState parks live CreateObject events whose target landblock hasn't been streamed in yet and back-fills them when it arrives, so spawn-vs-streaming races are no longer racy at all. MaxCompletionsPerFrame=4 spreads the 5×5 first-frame load over ~7 frames (~116ms) to avoid GPU OOM.
• ✓ SHIPPED — A.2 — Frustum culling. Per-landblock AABB test (Gribb-Hartmann plane extraction + positive-vertex AABB test) in both TerrainRenderer.Draw and StaticMeshRenderer.Draw. Per-entity culling deferred. LOD deferred to Phase C. Performance overlay in window title shows FPS, frame time, visible/total landblock ratio, entity count, animated count. ~160fps uncapped at 5×5 radius.
• ✓ SHIPPED — A.3 — Background net receive thread. Dedicated daemon thread continuously pulls raw UDP datagrams from the kernel buffer into a Channel<byte[]>. Render thread's Tick() drains the channel. All decode, fragment assembly, ISAAC crypto, event dispatch, and ack-sending remain on the render thread — minimal change that prevents packet drops during frame stalls. Thread starts after EnterWorld() completes; PumpOnce() during handshake still reads the socket directly.
• A.4 — Async dat decoding. Folded into the streaming worker — it's the worker's read path, not a separate subsystem. Called out here because regressions in dat caching could land on this surface.

Acceptance:

• Walk across 10+ landblocks in any direction, no crashes, no empty voids.
• Landblock-boundary crossings produce no visible hitch.
• Runtime window radius toggleable via environment variable.

Detailed spec: docs/superpowers/specs/2026-04-11-foundation-phase-design.md

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Phase B — Gameplay / interaction

Goal: actually play the game — walk the character on the server, click NPCs, pick up items, chat, basic combat loop.

Sub-pieces:

• ✓ SHIPPED — B.1 — Outbound ack pump. Shipped as Phase 4.9 — per-packet ACK_SEQUENCE, not periodic. Server no longer drops idle clients.
• ✓ SHIPPED — B.2 — Player movement mode. Tab-toggled WASD ground walking with collision-resolved outdoor terrain, walk/run/idle/turn-right animations, third-person chase camera, outbound MoveToState (0xF61C) + AutonomousPosition (0xF753) server messages, portal entry works. Outdoor→indoor transition disabled for MVP (CellSurface floor polygons too aggressive without portal-based detection). Minor polish remaining: strafe animation, turn-left animation. Spec: docs/superpowers/specs/2026-04-12-player-movement-design.md.
• ✓ SHIPPED — B.3 — Physics collision engine. TerrainSurface (heightmap bilinear Z), CellSurface (indoor floor polygon projection via barycentric interpolation), PhysicsEngine (top-level resolver with step-height enforcement, outdoor↔indoor cell transitions, gravity reporting). Populated from streaming pipeline. 16 unit tests with fake data. Spec: docs/superpowers/specs/2026-04-12-physics-collision-engine-design.md.
• B.4 — Use / UseWithTarget / PickUp. Outbound interaction messages. Drives opening doors, looting, talking to vendors.
• B.5 — Chat. SendTell, SendChat outbound + receive/display inbound (display side depends on Phase D.1).

References:

• references/ACE/Source/ACE.Server/Network/Handlers/MovementHandler.cs
• references/ACE/Source/ACE.Server/Network/Handlers/UseObjectHandler.cs
• references/holtburger/src/session/send.rs for outbound packet-building patterns

Acceptance: walk on-server with your character, open a door, talk to an NPC, send a chat message and see the echo.

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Phase C — Polish / visuals

Goal: close the visible gaps that make the world read as "old / broken" compared to retail.

Sub-pieces:

• C.1 — VFX / particle system. PhysicsScript parser, per-entity ParticleEmitter state, billboarded-quad particle renderer that lives in the Phase 9.1/9.2 translucent pass. Delivers portal swirls, chimney smoke, and fireplace flames in one implementation.
• C.2 — Dynamic point lights. Fireplaces and lamps need local lighting; small upgrade to the mesh shader to accumulate N (e.g., 4) nearest point lights per draw. Uniform-buffer or UBO-friendly layout.
• C.3 — Palette range tuning. Small per-range offset/length tweaks to match retail skin/hair/eye colors. Mostly diff and verify work, no architecture change.
• C.4 — Double-sided translucent polys. Edge case left by Phase 9.2: neg-side translucent polys are culled because cull is always BACK. Fix by tracking per-sub-mesh CullMode and flipping GL state per draw (or drawing twice with opposite cull). Minor.
• C.5 — Shadow mapping (optional). Deferred unless it becomes a bottleneck in screenshots — dynamic shadows are a known complexity trap.

References:

• references/ACE/Source/ACE.DatLoader/FileTypes/PhysicsScript.cs for the emitter schema
• references/ACViewer/ACViewer/Physics/Particles/ for the visual model
• references/WorldBuilder/Chorizite.OpenGLSDLBackend/Lib/ParticleBatcher.cs for the Silk.NET-flavored implementation

Acceptance: portals look like swirly gates, chimneys smoke, fireplaces burn, character skin matches retail screenshots.

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Phase D — UI / HUD + Sound

Goal: chat window, nameplates, inventory, and audio. Can run concurrently with Phase B or C because it doesn't touch gameplay/net/rendering surfaces.

Sub-pieces:

• D.1 — 2D ortho overlay + font rendering. ✅ SHIPPED 2026-04-17 as the dev-facing debug overlay (StbTrueTypeSharp system-font atlas + TextRenderer + DebugOverlay).
• D.2 — Retail UI framework + first panels. Research + scaffold landed 2026-04-17 (see docs/research/retail-ui/). Ships:
  • UiRoot + UiElement + UiPanel + UiHost with retail-faithful event codes (0x01 click, 0x15 drag-begin, 0x3E drop, 0x201 WM_LBUTTONDOWN, tooltip delay ~1000ms, etc.)
  • Focus / modal / capture / drag-drop / hover state machine
  • WorldMouseFallThrough / WorldKeyFallThrough preserves existing camera+player controls
  • First concrete panel (chat window) uses wire messages Phase 4.7 already parses
• D.3 — AcFont from portal.dat. Replace stb_truetype system font with retail Font DBObjs (0x40000000..0x40000FFF) baked from RenderSurface source sheets — see research slice 03 §4. Preserves retail visual identity.
• D.4 — Dat sprites + 9-slice panel backgrounds. Load RenderSurface (0x06xxxxxx) as GL textures; add DrawSprite to UiRenderContext. Enables retail panel art.
• D.5 — Core panels. Attributes (chunk_00470000.c:FUN_0047ba70), Skills (same), Paperdoll (chunk_004A0000.c:FUN_004A5200), Inventory, Spellbook (chunk_004C0000.c), Fellowship, Allegiance. Each uses the port sketches in slice 05.
• D.6 — HUD. Vital orbs (scissor-rect partial fill, dat sprites 0x060013B2), radar (0x06001388 / 0x06004CC1, 1.18× range factor), compass strip (scrolling U), target name plate, damage floaters, selection indicator. See slice 06.
• D.7 — Cursor manager. OS + dat-sourced custom cursors (FUN_0043c1c0 GDI HCURSOR builder pattern from slice 03).
• D.8 — Sound. SoundTable parser, Sound dat decode, audio engine (OpenAL via Silk.NET.OpenAL), per-entity 3D positional audio, optional music.

Reference docs: docs/research/retail-ui/00-master-synthesis.md + slices 01-06. Every AC-specific behavior has a decompiled FUN_ / DAT_ citation.

Acceptance: chat messages display in a retail-style panel, health/stamina/mana orbs fill correctly, attributes panel shows player stats, inventory opens with drag-drop working, and sound plays on hit/footstep.

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Phase E — "Feel alive" — motion hooks + audio + VFX

Unlocks the sensory layer: footsteps, swing whooshes, impact sparks, spell auras. All three systems share animation-hook delivery as the trigger source — motion hooks are the blocker.

Research backing: docs/research/deepdives/00-master-synthesis.md + R3 + R4 + R5.

• E.1 — Motion-hook expansion. Extend MotionInterpreter + AnimationSequencer to deliver all 27 AnimationHookType values (Sound=1, SoundTable=2, CreateParticle=18, AttackFrame=20, SoundTweaked=21, …) during frame advance. See r03-motion-animation.md.
• E.2 — Audio engine. AudioEngine via Silk.NET.OpenAL, inverse-square CPU falloff, 16-voice pool. SoundTable + Wave dat decoders. Motion-hook wiring for footsteps + attacks. See r05-audio-sound.md.
• E.3 — Particle system. ParticleSystem on Silk.NET GL (port WorldBuilder's ParticleBatcher). 13 motion-type integrators. PhysicsScript dispatcher tied to motion-hooks. See r04-vfx-particles.md.

Acceptance: walk around, footstep sounds per material; swing a weapon, hear whoosh; combat impact shows sparks + hit sound.

Phase F — Fight + cast + gear

Core gameplay loop on top of Phase E.

Research: R1 + R2 + R6 + R8 + UI slices 04/05.

• F.1 — GameEvent envelope dispatcher. 94 sub-opcodes in 0xF7B0. Zero handled today. Start with PlayerDescription (0x0013) + property-update events. See r08-network-protocol-atlas.md.
• F.2 — Item + inventory model. ItemInstance / Container / PropertyBundle. Appraise round-trip (0x00C8 → 0x00C9). Burden math. See r06-items-inventory.md + src/AcDream.Core/Items/.
• F.3 — Combat math + damage flow. Damage formula, per-body-part AL, crit, hit-chance sigmoid. Server broadcasts damage events; client displays + HP bar. See r02-combat-system.md + src/AcDream.Core/Combat/.
• F.4 — Spell cast state machine. SpellCastStateMachine + active buff tracking. Buffs + recalls first, projectile spells later. Fizzle sigmoid + mana conversion. See r01-spell-system.md + src/AcDream.Core/Spells/.
• F.5 — Core panels. Attributes / Skills / Paperdoll / Inventory / Spellbook — using the retail-ui framework from Phase D.2. See 05-panels.md under retail-ui.

Acceptance: equip a weapon, swing at a monster, see damage numbers, buff yourself, recall to the lifestone.

Phase G — World systems

Research: R9 + R12 + R13.

• G.1 — Sky + weather + day-night. Deterministic client-side from Portal Year time. Sky dome geometry + keyframe gradients + rain/snow particles. See r12-weather-daynight.md.
• G.2 — Dynamic lighting. 8-light D3D-style fixed pipeline. Hard-cutoff at Range, no attenuation inside. Cell ambient. Shader UBO per frame. See r13-dynamic-lighting.md.
• G.3 — Dungeon streaming + portal space. EnvCellStreamer, portal-visibility BFS, PlayerTeleport (0xF751) handling with LoginComplete re-send, "pink bubble" loading state. See r09-dungeon-portal-space.md.

Acceptance: walk outside at dusk, see the sky gradient + sun moving; enter a torch-lit dungeon via portal; leave back to daylight.

Phase H — Social + progression

Research: R7 + R10 + R11 + UI slice 05.

• H.1 — Chat window. UI panel + all 6 wire opcodes (Channel, Tell, System, HearSpeech, HearRangedSpeech, TurbineChat).
• H.2 — Allegiance. Tree model + XP pass-up math + 5 allegiance chat channels + MOTD. See r11-allegiance.md.
• H.3 — Emote scripts + quests + dialogs. 122 EmoteType × 39 Trigger mini-VM. Contract tracker UI. NPC dialog rendered via chat with <Tell:…> markup. See r10-quest-dialogs.md.
• H.4 — Character creation. 0xE000002 CharGen dat + 13 heritages + templates + appearance picker + preview renderer. See r07-character-creation.md.

Acceptance: create a character from scratch, talk to an NPC, get + complete a quest, gain XP that passes up to the patron.

Phase J — Long-tail (deferred / low-priority)

Not detailed here; each gets its own brainstorm when it becomes relevant.

• Player character full rig (held weapons, spell effects, death/revive animation)
• Group/fellowship UI
• Trade window (multi-player confirms)
• Salvage + tinker UI
• House ownership + hooks
• Society UI
• GM visible tools (we explicitly don't build GM powers; but DEV-mode tools like teleport anywhere are useful)

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Cross-cutting work tracked in parallel

• Test coverage. Each phase lands with unit + integration tests in tests/. Current count: 98 Core + 96 Core.Net = 194. Keep the ratio as new phases land.
• Memory files. Project state under memory/project_phase_*_state.md is updated when a phase ships. MEMORY.md is the index.
• CLAUDE.md discipline. Check all four references (ACE, ACViewer, WorldBuilder, Chorizite) before committing to an approach. WorldBuilder is the closest stack match and should be checked first.

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Explicitly out of scope

• Server emulation — we use ACE for server, never reimplement.
• Account creation — direct user to ACE tooling.
• Anti-cheat / GM tools / live-ops — irrelevant for personal use.
• Cross-platform support — Windows-only; the dat path assumptions depend on retail Windows install layout. Silk.NET is cross-platform but we don't promise.
• Custom game content — this is a client for existing AC data, not a toolchain.

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"When will my specific complaint be fixed?" — quick lookup

Observation	Phase
Drudge statue in wrong pose	6.3 FIXED ✓
Characters in T-pose / wrong idle	6.1 FIXED ✓
No breathing on NPCs	6.4 + sentinel fix FIXED ✓
Lifestone crystal has one side missing	9.2 FIXED ✓
Ground floor flickering with terrain	7.1 FIXED ✓
Houses missing second floors / walls	7.1 FIXED ✓ (interior mesh landed)
Character clothing missing / wrong	5 FIXED ✓
Statue wrong color / wrong scale	5 FIXED ✓
Holtburg sign half-buried	5 FIXED ✓
Can't walk past the loaded 3×3 window	A.1 FIXED ✓ (5×5 default, ACDREAM_STREAM_RADIUS to tune)
Frame hitch crossing landblock boundary	Phase A.3 (synchronous loader for now; async returns when DatCollection is thread-safe)
Walking around doesn't move me on the server	Phase B.3 FIXED ✓
Can't talk to NPCs	Phase H.3 (emote scripts + dialogs)
Can't open a door	Phase F (object-use action)
Portals render as a rotating black disk	Phase E.3 (particle system)
Chimneys have no smoke	Phase E.3
Houses have no fireplace fire	Phase E.3
No fireplace / torch lighting	Phase G.2 (dynamic lighting)
Skin/hair color slightly off	Phase C.3
No chat window	Phase H.1
No sound	Phase E.2
Dungeons / foundry interior missing	Phase G.3
Can't fight monsters	Phase F.3 (combat math + damage)
Can't cast spells	Phase F.4
No inventory panel	Phase F.2 + F.5
No character creation — must use ACE admin	Phase H.4
Sky is a flat color	Phase G.1 (weather + day-night)
Can't join allegiance	Phase H.2
No quest tracker	Phase H.3

If you see something not on this list, add it here and assign a phase.