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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 3fd774515a fix(core): emit both sides of double-sided polygons in GfxObjMesh 
The lifestone (and likely any weenie with closed shells using NoPos /
Negative / Both stippling) rendered with visible holes where you could
see inside it — confirmed via the user's "see into it" description.
Root cause: GfxObjMesh.Build skipped any polygon whose PosSurface was
out of range, which is exactly what a NoPos-stippled or
negative-only polygon looks like. Backface culling isn't involved
(acdream has it disabled); we were simply dropping triangles.

Ported the pos/neg emission rule from
references/WorldBuilder/Chorizite.OpenGLSDLBackend/Lib/
ObjectMeshManager.cs (lines 955-971 and 1510-1577):

  pos side: emit when !Stippling.NoPos and PosSurface is valid
  neg side: emit when Stippling.Negative, Stippling.Both, OR
            (!Stippling.NoNeg && SidesType == CullMode.Clockwise)

The "Clockwise CullMode means NegUVIndices are on the wire" rule is
non-obvious but matches how Polygon.Unpack reads NegUVIndices, so
any closed mesh relying on that convention now renders correctly.

Neg-side triangles get the reversed fan winding and a negated vertex
normal. With culling off the winding only matters for lighting
consistency, but keeping the semantics right future-proofs the
fix if we ever enable back-face culling for a perf pass. The
dedup cache is keyed by (posIdx, uvIdx, isNeg) so the same vertex
can carry different normals on the pos and neg sides.

Pos-side winding is preserved at the original (0, i, i+1) order so
the existing single-triangle and fan-triangulation tests still pass
— neg side uses (i+1, i, 0), which is the same shape mirrored.

194 tests green.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-11 20:59:10 +02:00
docs/plans docs(plan): roadmap with every observed defect mapped to a phase 2026-04-11 18:30:55 +02:00
src fix(core): emit both sides of double-sided polygons in GfxObjMesh 2026-04-11 20:59:10 +02:00
tests feat(net): Phase 6.7 — parse UpdatePosition (0xF748) into PositionUpdated event 2026-04-11 20:37:32 +02:00
.gitignore chore: phase 0 — skeleton + dat asset inventory 2026-04-10 09:02:56 +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 feat(net+app): SubPalette overlays applied to palette-indexed textures (Phase 5b) 2026-04-11 16:30:08 +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.