erik/acdream
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

feat(app): load landblock from dats and upload mesh to GPU

Browse source 
GameWindow now owns a DatCollection + TerrainRenderer. On load it
opens the dat directory passed as argv[0] (or ACDREAM_DAT_DIR), finds
Holtburg (landblock 0xA9B4FFFF) by default with a fallback to the
first landblock in the cell b-tree, builds the CPU mesh from
LandblockMesh.Build, and uploads VBO+EBO+VAO with a 3f/3f/2f attribute
layout. No draw call yet — shader and matrix uniforms land in Task 9.

Enabled AllowUnsafeBlocks on the App csproj so the fixed-buffer upload
in TerrainRenderer compiles. Uses dats.Get<LandBlock>(id) instead of
TryGet(..., out T) to sidestep the [MaybeNullWhen(false)] analysis that
TreatWarningsAsErrors was flagging.

Smoke verified against the real retail dats: prints
"loaded landblock 0xA9B4FFFF" and the window stays alive with no GL
errors or exceptions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-04-10 16:42:13 +02:00
parent 6d18e0bd38
commit 8356fe65a0
4 changed files with 113 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/AcDream.App/Rendering/GameWindow.cs
View file

@ -1,3 +1,7 @@
using AcDream.Core.Terrain;
using DatReaderWriter;
using DatReaderWriter.DBObjs;
using DatReaderWriter.Options;
using Silk.NET.Input;
using Silk.NET.Maths;
using Silk.NET.OpenGL;
@ -7,9 +11,14 @@ namespace AcDream.App.Rendering;
public sealed class GameWindow : IDisposable
{
private readonly string _datDir;
private IWindow? _window;
private GL? _gl;
private IInputContext? _input;
private TerrainRenderer? _terrain;
private DatCollection? _dats;
public GameWindow(string datDir) => _datDir = datDir;
public void Run()
{
@ -45,15 +54,46 @@ public sealed class GameWindow : IDisposable
};
_gl.ClearColor(0.05f, 0.10f, 0.18f, 1.0f);
_gl.Enable(EnableCap.DepthTest);
_dats = new DatCollection(_datDir, DatAccessType.Read);
// Find ANY landblock ending in 0xFFFF. Holtburg 0xA9B4FFFF is a
// good default; fall back to the first one we find.
uint landblockId = 0xA9B4FFFFu;
var block = _dats.Get<LandBlock>(landblockId);
if (block is null)
{
foreach (var file in _dats.Cell.Tree)
{
if ((file.Id & 0xFFFFu) == 0xFFFFu)
{
landblockId = file.Id;
block = _dats.Get<LandBlock>(landblockId);
break;
}
}
}
if (block is null)
throw new InvalidOperationException("no landblock found in cell dat");
Console.WriteLine($"loaded landblock 0x{landblockId:X8}");
var meshData = LandblockMesh.Build(block);
_terrain = new TerrainRenderer(_gl, meshData);
}
private void OnRender(double deltaSeconds)
{
_gl!.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
_terrain?.Draw();
}
private void OnClosing()
{
_terrain?.Dispose();
_dats?.Dispose();
_input?.Dispose();
_gl?.Dispose();
}