feat(vfx): bind effects to live animated poses

src/AcDream.Core/Vfx/EmitterDescLoader.cs

@@ -14,8 +14,6 @@ namespace AcDream.Core.Vfx;
 /// </summary>
 public sealed class EmitterDescRegistry
 {
-    private const uint FallbackEmitterId = 0xFFFFFFFFu;
-
     private readonly Func<uint, DatParticleEmitter?>? _resolver;
     private readonly ConcurrentDictionary<uint, EmitterDesc> _byId = new();
 
@@ -32,7 +30,6 @@ public sealed class EmitterDescRegistry
     public EmitterDescRegistry(Func<uint, DatParticleEmitter?>? resolver)
     {
         _resolver = resolver;
-        Register(BuildFallback());
     }
 
     public void Register(EmitterDesc desc)
@@ -43,9 +40,16 @@ public sealed class EmitterDescRegistry
 
     public EmitterDesc Get(uint emitterId)
     {
-        if (_byId.TryGetValue(emitterId, out var desc))
+        if (TryGet(emitterId, out EmitterDesc? desc))
             return desc;
+        throw new KeyNotFoundException(
+            $"ParticleEmitterInfo 0x{emitterId:X8} was not found.");
+    }
 
+    public bool TryGet(uint emitterId, out EmitterDesc desc)
+    {
+        if (_byId.TryGetValue(emitterId, out desc!))
+            return true;
         if (_resolver is not null)
         {
             var dat = _resolver(emitterId);
@@ -53,14 +57,11 @@ public sealed class EmitterDescRegistry
             {
                 desc = FromDat(emitterId, dat);
                 _byId[emitterId] = desc;
-                return desc;
+                return true;
             }
         }
-
-        if (_byId.TryGetValue(FallbackEmitterId, out var fallback))
-            return fallback;
-
-        throw new InvalidOperationException("No default emitter registered in registry.");
+        desc = null!;
+        return false;
     }
 
     public int Count => _byId.Count;
@@ -145,36 +146,6 @@ public sealed class EmitterDescRegistry
         }
     }
 
-    private static EmitterDesc BuildFallback() => new()
-    {
-        DatId = FallbackEmitterId,
-        Type = ParticleType.LocalVelocity,
-        EmitterKind = ParticleEmitterKind.BirthratePerSec,
-        Flags = EmitterFlags.Billboard | EmitterFlags.FaceCamera,
-        Birthrate = 0.1f,
-        EmitRate = 10f,
-        MaxParticles = 32,
-        LifetimeMin = 0.6f,
-        LifetimeMax = 1.2f,
-        Lifespan = 0.9f,
-        LifespanRand = 0.3f,
-        OffsetDir = new Vector3(0, 0, 1),
-        MinOffset = 0f,
-        MaxOffset = 0.1f,
-        SpawnDiskRadius = 0.1f,
-        InitialVelocity = new Vector3(0, 0, 0.5f),
-        VelocityJitter = 0.3f,
-        A = new Vector3(0, 0, 0.5f),
-        MinA = 1f,
-        MaxA = 1f,
-        B = Vector3.Zero,
-        C = Vector3.Zero,
-        StartSize = 0.25f,
-        EndSize = 0.6f,
-        StartAlpha = 0.85f,
-        EndAlpha = 0f,
-    };
-
     private static ParticleEmitterKind MapEmitterKind(DatEmitterType type) => type switch
     {
         DatEmitterType.BirthratePerSec => ParticleEmitterKind.BirthratePerSec,