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feat(app): render static meshes from Holtburg LandBlockInfo

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This commit is contained in:
Erik 2026-04-10 18:32:09 +02:00
parent cefc689ba8
commit 1375780e14
4 changed files with 232 additions and 0 deletions
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74
src/AcDream.App/Rendering/GameWindow.cs
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@ -21,6 +21,10 @@ public sealed class GameWindow : IDisposable
private DatCollection? _dats;
private float _lastMouseX;
private float _lastMouseY;
private StaticMeshRenderer? _staticMesh;
private Shader? _meshShader;
private TextureCache? _textureCache;
private IReadOnlyList<AcDream.Core.World.WorldEntity> _entities = Array.Empty<AcDream.Core.World.WorldEntity>();
public GameWindow(string datDir) => _datDir = datDir;
@ -83,6 +87,10 @@ public sealed class GameWindow : IDisposable
Path.Combine(shadersDir, "terrain.vert"),
Path.Combine(shadersDir, "terrain.frag"));
_meshShader = new Shader(_gl,
Path.Combine(shadersDir, "mesh.vert"),
Path.Combine(shadersDir, "mesh.frag"));
_camera = new OrbitCamera
{
Aspect = _window!.Size.X / (float)_window.Size.Y,
@ -117,16 +125,82 @@ public sealed class GameWindow : IDisposable
var meshData = LandblockMesh.Build(block);
_terrain = new TerrainRenderer(_gl, meshData, _shader);
_textureCache = new TextureCache(_gl, _dats);
_staticMesh = new StaticMeshRenderer(_gl, _meshShader, _textureCache);
// Load LandBlockInfo for Holtburg, hydrate entities.
var info = _dats.Get<DatReaderWriter.DBObjs.LandBlockInfo>((landblockId & 0xFFFF0000u) | 0xFFFEu);
var entities = info is not null
? AcDream.Core.World.LandblockLoader.BuildEntitiesFromInfo(info)
: Array.Empty<AcDream.Core.World.WorldEntity>();
// Populate MeshRefs for each entity by resolving its source id to GfxObj or Setup
// and extracting sub-meshes. Store back onto the entity. Since WorldEntity is
// `required init`, we rebuild the entity here.
var hydratedEntities = new List<AcDream.Core.World.WorldEntity>(entities.Count);
foreach (var e in entities)
{
var meshRefs = new List<AcDream.Core.World.MeshRef>();
if ((e.SourceGfxObjOrSetupId & 0xFF000000u) == 0x01000000u)
{
// GfxObj: one mesh ref with identity transform.
var gfx = _dats.Get<DatReaderWriter.DBObjs.GfxObj>(e.SourceGfxObjOrSetupId);
if (gfx is not null)
{
var subMeshes = AcDream.Core.Meshing.GfxObjMesh.Build(gfx);
_staticMesh.EnsureUploaded(e.SourceGfxObjOrSetupId, subMeshes);
meshRefs.Add(new AcDream.Core.World.MeshRef(e.SourceGfxObjOrSetupId, System.Numerics.Matrix4x4.Identity));
}
}
else if ((e.SourceGfxObjOrSetupId & 0xFF000000u) == 0x02000000u)
{
// Setup: flatten into parts, upload each part's GfxObj.
var setup = _dats.Get<DatReaderWriter.DBObjs.Setup>(e.SourceGfxObjOrSetupId);
if (setup is not null)
{
var flat = AcDream.Core.Meshing.SetupMesh.Flatten(setup);
foreach (var mr in flat)
{
var gfx = _dats.Get<DatReaderWriter.DBObjs.GfxObj>(mr.GfxObjId);
if (gfx is null) continue;
var subMeshes = AcDream.Core.Meshing.GfxObjMesh.Build(gfx);
_staticMesh.EnsureUploaded(mr.GfxObjId, subMeshes);
meshRefs.Add(mr);
}
}
}
if (meshRefs.Count > 0)
{
hydratedEntities.Add(new AcDream.Core.World.WorldEntity
{
Id = e.Id,
SourceGfxObjOrSetupId = e.SourceGfxObjOrSetupId,
Position = e.Position,
Rotation = e.Rotation,
MeshRefs = meshRefs,
});
}
}
_entities = hydratedEntities;
Console.WriteLine($"hydrated {_entities.Count} entities on landblock 0x{landblockId:X8}");
}
private void OnRender(double deltaSeconds)
{
_gl!.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
_terrain?.Draw(_camera!);
_staticMesh?.Draw(_camera!, _entities);
}
private void OnClosing()
{
_staticMesh?.Dispose();
_textureCache?.Dispose();
_meshShader?.Dispose();
_terrain?.Dispose();
_shader?.Dispose();
_dats?.Dispose();