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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 c5de445e5c fix(core): AC2D render split formula + triangle-aware Z sampling 
Two fundamental terrain fixes based on the AC2D + holtburger deep dive:

1. Terrain split formula: replaced WorldBuilder's physics-path formula
   (214614067/1813693831) with AC2D's render-path formula (0x0CCAC033,
   0x421BE3BD, 0x6C1AC587, 0x519B8F25). The two produce different splits
   for some cells. Since the render mesh uses this formula, the physics
   Z sampler must match it to avoid misalignment on slopes.

2. Triangle-aware Z: replaced bilinear interpolation in TerrainSurface
   with per-triangle barycentric interpolation. Each cell is split into
   two triangles (using the same AC2D formula). SampleZ determines which
   triangle the query point falls in, then interpolates within that
   triangle. This produces Z values that exactly match the visual terrain
   mesh — no more slope clipping.

Removes the multi-point Z sampling hack from PlayerMovementController
(no longer needed with exact triangle Z).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-12 22:08:42 +02:00
docs docs: movement deep dive — AC2D + holtburger cross-reference 2026-04-12 21:52:12 +02:00
src fix(core): AC2D render split formula + triangle-aware Z sampling 2026-04-12 22:08:42 +02:00
tests fix(app): multi-point Z sampling + never-cull player landblock 2026-04-12 21:29:54 +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 docs: movement deep dive — AC2D + holtburger cross-reference 2026-04-12 21:52:12 +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.