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Introduces `docs/ISSUES.md` as the tactical rolling list of known bugs + small deferred features. Scope is strict: anything fitting in one-to-two commits lives here; anything larger gets promoted to a Phase in the roadmap. Complement, not replacement, of the strategic roadmap. Schema per issue: - Sequential integer ID (#1, #2, ...) - Status (OPEN / IN-PROGRESS / DONE) - Severity (HIGH / MEDIUM / LOW) - Filed date, component, description, root cause, files, research, acceptance - DONE items move to "Recently closed" at the bottom with commit SHA Four seeded issues from the 2026-04-24 sky-debug session: #1 — Rain falls only to horizon, not to player (weather/particles) #2 — Lightning visual not wired (dat-baked PES triggers; research done) #3 — Client clock drifts from retail after ~10 min (periodic TimeSync) #4 — Sky horizon-glow disabled (fog-mix skipped on sky meshes) CLAUDE.md adds an "Issue tracking" section right after roadmap discipline with the four maintenance rules: (1) scan OPEN at session start, (2) add/close at session end, (3) reference IDs in commit messages, (4) promote to a Phase if an issue grows. Calls out the strategic-vs-tactical split so future sessions know when to reach for the roadmap vs the issues file. README.md gets one line pointing at `docs/ISSUES.md` below the existing roadmap link for first-class discoverability. No code changes; doc-only.
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153 lines
8.4 KiB
Markdown
# acdream — known issues + small deferred features
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Rolling tactical list. What goes here:
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- **Bugs**: user-visible defects we've observed but haven't fixed yet.
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- **Small deferred features**: work that fits in one or two commits.
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Anything larger should be a named Phase in the [roadmap](plans/2026-04-11-roadmap.md).
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What does NOT go here:
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- Large multi-commit work → add a Phase to the roadmap instead.
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- Ideas / wishlist → `docs/plans/`.
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- Design questions → open a `docs/research/*.md` note.
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## Conventions
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- Sequential integer IDs (`#1`, `#2`, …). Commits that close an issue reference the ID in the message (e.g. `fix #3: periodic TimeSync parsing`).
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- `Status` is `OPEN`, `IN-PROGRESS`, or `DONE`. DONE items move to the **Recently closed** section at the bottom with closed-date + commit SHA.
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- Every session: scan OPEN issues at start; promote/close anything we touched during the session before ending.
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- Promoting to a Phase: mark as `DONE (promoted to Phase X)` + commit SHA where the Phase entry landed.
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## Template
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Copy this block when adding a new issue:
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```
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## #NN — Short title
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**Status:** OPEN
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**Severity:** HIGH | MEDIUM | LOW
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**Filed:** YYYY-MM-DD
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**Component:** e.g. sky, physics, net, ui
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**Description:** One paragraph — what's wrong or what's missing.
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**Root cause / status:** What we know so far. Empty if unknown.
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**Files:** Path references with approximate line numbers.
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**Research:** Links to `docs/research/*.md` if applicable.
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**Acceptance:** How we'll know it's fixed.
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```
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---
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# Active issues
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## #1 — Rain falls only to horizon, not to the player's feet
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**Status:** OPEN
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**Severity:** MEDIUM
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**Filed:** 2026-04-25
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**Component:** weather / particles
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**Description:** During Rainy DayGroups, rain particles are visible in the upper sky band but fade out before reaching the camera / ground level. Retail's rain falls all the way past the camera to the terrain.
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**Root cause / status:** Unknown. Likely one of: (a) particle emitter volume too short in Z, (b) particle lifetime shorter than the time it takes to traverse emitter-top → ground, (c) emitter anchored in world-space so particles escape the player's reference frame as they fall, (d) camera-relative spawn origin is offset too high above the player.
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**Files:**
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- `src/AcDream.App/Rendering/GameWindow.cs` — `UpdateWeatherParticles` (~line 4591)
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- `src/AcDream.Core/Vfx/ParticleSystem.cs` — emitter spawn config + lifetime integration
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**Research:** `docs/research/deepdives/r12-weather-daynight.md` (rain mechanism — but does not pin volume / lifetime values).
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**Acceptance:** Standing at 9,115 in Holtburg during a Rainy DayGroup, rain drops visibly fall all the way from the sky band past the camera to the ground level.
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---
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## #2 — Lightning visual not wired (dat-baked PES triggers)
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**Status:** OPEN
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**Severity:** MEDIUM
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**Filed:** 2026-04-25
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**Component:** weather / sky / vfx
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**Description:** Retail's Rainy DayGroup in the Dereth Region dat contains 12+ `SkyObject` entries with non-zero `PesObjectId` and narrow visibility windows (5–70 ms at keyframe-boundary moments) that drive PhysicsScript-authored flash + thunder effects. We render the sky meshes but ignore the PES path, so no lightning flashes appear during storms. The fragment-shader flash bump on `uFogParams.z` is already wired in `sky.frag` — only the CPU-side PES→runner wire is missing.
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**Root cause / status:** Research complete. Implementation is: in `SkyRenderer.Render`, detect visibility-window entry on any SkyObject with `obj.PesObjectId != 0`, call `PhysicsScriptRunner.Play(pesObjectId, ownerId: sky-owner, anchorPos: camera)`, and route any `SetFlash` / `Sound` hooks from the script into `uFogParams.z` + audio.
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**Files:**
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- `src/AcDream.App/Rendering/Sky/SkyRenderer.cs` — add per-SkyObject PES dispatch inside the visibility loop
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- `src/AcDream.Core/Vfx/PhysicsScriptRunner.cs` — already shipped (Phase 6a); exposes `Play(scriptId, entityId, anchorWorldPos)`
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- `src/AcDream.Core/Lighting/SceneLightingUbo.cs` — `FogParams.Z` is the flash slot; needs a sink that bumps it and decays
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- `src/AcDream.App/Rendering/Shaders/sky.frag` — flash bump already wired (`rgb += flash * vec3(1.5, 1.5, 1.8)`)
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**Research:**
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- `docs/research/2026-04-23-lightning-real.md` (decompile trace + dat discovery)
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- `docs/research/2026-04-23-physicsscript.md` (runtime semantics)
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- `docs/research/2026-04-23-lightning-crossfade.md` (crossfade mechanism)
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**Acceptance:** During a Rainy DayGroup's storm window, visible flashes appear in the sky at the dat-scripted moments, the fragment-shader flash bump briefly brightens the scene, and (later, once thunder audio is wired) a thunder clap plays with a short propagation delay.
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---
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## #3 — Client clock drifts from retail after ~10 minutes (periodic TimeSync missing)
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**Status:** OPEN
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**Severity:** MEDIUM
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**Filed:** 2026-04-25
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**Component:** net / sky
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**Description:** Our `WorldTimeService.DayFraction` syncs with the server once at login via `ConnectRequest + TimeSync`, then advances from the local wall-clock. Retail receives periodic `TimeSync` refreshes (header flag `0x1000000`) carrying a fresh `PortalYearTicks double` and re-anchors its clock. Without those, acdream's keyframe state drifts from retail's over 10+ minutes — observed during the 2026-04-24 sky-color debug sessions where retail was at DayFraction 0.976 while acdream was at 0.634.
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**Root cause / status:** Mechanism is well-understood (see research). `WorldTimeService.SyncFromServer(double)` already exists — we just need to detect the periodic flag in the packet header and call it whenever a fresh tick arrives.
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**Files:**
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- `src/AcDream.Core.Net/WorldSession.cs` — header-flag parsing; currently only the initial sync is consumed
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- `src/AcDream.Core/World/WorldTimeService.cs` — `SyncFromServer(double ticks)` ready; needs caller wiring
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**Research:** `docs/research/deepdives/r12-weather-daynight.md` §TimeSync (line ~563). References retail packet-header flag `0x1000000` carrying `PortalYearTicks double`.
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**Acceptance:** Probe retail via `tools/RetailTimeProbe` and acdream's ACDREAM_DUMP_SKY log at the same wall-clock moment after a 20-minute session without re-login; `abs(acdream.DayFraction - retail.DayFraction) < 0.01`.
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---
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## #4 — Sky horizon-glow disabled (fog-mix skipped on sky meshes)
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**Status:** OPEN
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**Severity:** LOW (aesthetic feature-parity, not regression from pre-session state)
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**Filed:** 2026-04-25
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**Component:** sky
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**Description:** Phase 8.1 (commit `593b76f`) disabled the fog-mix on sky meshes to fix the "entire dome swallowed by fog color" regression. Dereth's keyframe `FogEnd` values (0–2400 m) are calibrated for terrain; sky meshes are authored at radii 1050–14271 m so every sky pixel was past `FogEnd`, saturated to `uFogColor`, destroying stars / moon / dome texture. Disabling the mix restored visibility but we lost retail's horizon-glow effect (gradient from clear zenith to fog-tinted horizon band at dusk/dawn).
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**Root cause / status:** Three competing hypotheses, none pinned down: (a) retail uses a **different** fog range for sky than terrain; (b) retail applies fog with an **elevation-angle** weighting rather than linear distance; (c) retail's sky meshes **don't participate** in the global fog and the "horizon glow" comes from a different atmospheric-scatter path. Need to identify retail's actual sky-fog behaviour before re-enabling with correct parameters.
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**Files:**
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- `src/AcDream.App/Rendering/Shaders/sky.frag` — line ~55, `rgb = mix(uFogColor.rgb, rgb, vFogFactor)` currently commented out
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- `src/AcDream.App/Rendering/Shaders/sky.vert` — lines 109-114, `vFogFactor` computation
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**Research:** `docs/research/2026-04-23-sky-fog.md`. Partial; doesn't pin the sky-specific fog path.
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**Acceptance:** At dusk in Holtburg, the sky dome shows a clear zenith and a warm fog-tinted horizon band that matches retail's appearance, with stars / moon / sun / clouds all still visible at their correct brightnesses elsewhere in the frame.
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---
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# Recently closed
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*(none yet — move DONE items here with closed-date + commit SHA)*
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<!--
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Example:
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## #0 — [DONE 2026-04-24 · 593b76f] Sky cube edges visible as cross in daytime sky
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**Closed:** 2026-04-24
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**Commit:** `593b76f sky(phase-8.1): CLAUDE_TO_EDGE on static sky meshes`
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**Resolution:** Switched to `GL_CLAMP_TO_EDGE` wrap mode for static sky
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meshes; scrolling cloud layers kept `GL_REPEAT`. The 5 dome walls were
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sampling opposite-edge pixels via UV wrap + LINEAR filtering, producing
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visible seam lines that formed a cube outline across the view.
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-->
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