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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 c95481ea69 feat(core): per-vertex terrain normals via central differences (Phase 3b) 
LandblockMesh was hardcoding Normal=Vector3.UnitZ for every vertex,
which meant Phase 3a's directional lighting gave every terrain fragment
the same brightness — flat-looking terrain regardless of slope.

Now computes a real per-vertex normal by sampling the 4 heightmap
neighbors and taking central differences on the heights. The surface
is z=h(x,y), tangents are Sx=(1,0,dh/dx) and Sy=(0,1,dh/dy), and the
normal is their cross product: (-dh/dx, -dh/dy, 1) normalized. Edge
vertices use forward/backward difference instead of central.

Heightmap is pre-sampled into a 9x9 float grid before the vertex loop
so neighbor lookups don't hit the heightTable dictionary-style 81 times
per vertex — one pass to precompute, one pass to emit vertices.

Existing tests still pass: flat landblocks produce flat normals
(constant heights → zero derivatives → UnitZ), so the Phase 1 tests'
"all vertices same Z" assertion remains accurate.

Combined with 3268556 (lighting), terrain hills now visually catch the
sun on their sunward slopes and darken on shadowed slopes. Holtburg's
gentle rolling hills should look considerably more three-dimensional.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-10 22:23:35 +02:00
docs/plans docs: phase 2b implementation plan (9 tasks) 2026-04-10 20:13:03 +02:00
src feat(core): per-vertex terrain normals via central differences (Phase 3b) 2026-04-10 22:23:35 +02:00
tests feat(core): add IGameState, IEvents, WorldEvents with replay-on-subscribe 2026-04-10 20:29:29 +02:00
.gitignore chore: phase 0 — skeleton + dat asset inventory 2026-04-10 09:02:56 +02:00
AcDream.slnx feat(app): wire plugin host, ship smoke plugin, log lifecycle 2026-04-10 16:46:25 +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.