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Modern open-source C# .NET 10 Asheron's Call client. Faithful port of retail client behaviour to Silk.NET with a plugin API.
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Erik cd8a37a9c8 sky(phase-3f): anchor calendar to dat's GameTime.ZeroTimeOfYear 
Final piece of the retail-sync puzzle. Live Dereth dat has
GameTime.ZeroTimeOfYear = 3600 (verified 2026-04-23 diagnostic dump).
Our DerethDateTime hardcoded +7/16 × DayTicks = 3333.75, copied from
ACE's DerethDateTime.cs comment "tick 0 = Morntide-and-Half". The dat
is authoritative; ACE's comment is wrong by 266.25 ticks (~33 Dereth
minutes).

User-observed regression (2026-04-23):
  acdream: middle-of-night (Darktide), clear, DayGroup "Sunny"
  retail:  near-pre-dawn (Foredawn), thunderstorm, stormy DayGroup
  (both connected to the same ACE at PortalYearTicks=291134079)

Same server tick → different calendar extraction → the offset skewed
dayFraction AND pushed DayOfYear across a boundary at certain ticks,
feeding a different LCG seed into the DayGroup picker (FUN_00501990).
A single 266.25-tick offset error explains both the time mismatch and
the weather mismatch.

Code changes:
- DerethDateTime.OriginOffsetTicks — runtime-settable static, default
  = DayFractionOriginOffsetTicks (3333.75, the legacy fallback).
  Applied in DayFraction, Year, DayOfYear, ToCalendar.
- DerethDateTime.SetOriginOffsetFromDat(double) — called at Region
  load.
- SkyDescLoader.DumpRegionSkyDesc dumps GameTime fields (and all 16
  TimesOfDay entries) when ACDREAM_DUMP_SKY=1.
- GameWindow.LoadRegion adopts the dat's ZeroTimeOfYear after
  LoadFromRegion, logs the before/after values.

Also dumps every Dereth TimeOfDay hour-boundary (0..15) so any future
calendar weirdness has authoritative ground truth in the log.

Build + 733 tests green (no test depended on the hardcoded offset).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-24 10:00:54 +02:00
docs sky(phase-3c): port retail FUN_00501990 DayGroup picker (uniform LCG) 2026-04-24 08:45:34 +02:00
memory docs(memory): session 2026-04-19 handoff — remote motion port complete 2026-04-19 21:33:12 +02:00
src sky(phase-3f): anchor calendar to dat's GameTime.ZeroTimeOfYear 2026-04-24 10:00:54 +02:00
tests sky(phase-3e): drive WeatherSystem from DayGroup name — no more rogue rain 2026-04-24 09:32:27 +02:00
tools feat(core): port decompiled AC client physics — CollisionPrimitives + PhysicsBody 2026-04-12 23:54:51 +02:00
.gitignore chore: gitignore launch.log 2026-04-18 23:11:56 +02:00
AcDream.slnx feat(net): AcDream.Core.Net scaffold + ISAAC keystream (Phase 4.1) 2026-04-11 14:14:28 +02:00
CLAUDE.md docs(claude.md): add 'Running the client against the live server' section 2026-04-19 14:58:13 +02:00
README.md chore: phase 0 — skeleton + dat asset inventory 2026-04-10 09:02:56 +02:00

README.md

acdream

Experimental modern open-source Asheron's Call client in C# / .NET 10.

Status: pre-alpha, not playable. Phase 0 only — dat file asset inventory.

Stack: .NET 10, Chorizite.DatReaderWriter for dat parsing. Silk.NET + Avalonia planned for rendering/UI (not yet wired up).

Requires: A retail Asheron's Call install (Turbine/Microsoft property — supply your own). Set ACDREAM_DAT_DIR environment variable to the directory containing client_portal.dat, client_cell_1.dat, client_highres.dat, and client_local_English.dat, or pass it as the first CLI argument.

Layout

  • src/AcDream.Cli/ — console app that dumps asset counts from a dat directory
  • references/ — local read-only reference material (ACE, ACViewer, WorldBuilder, DatReaderWriter, holtburger, retail AC install). Gitignored.

Run

dotnet run --project src/AcDream.Cli -- "C:\path\to\Asheron's Call"

Or set ACDREAM_DAT_DIR and run without args.