feat: added spawn payload in snapshot, reduce allocations in entity state

Ragon/Sources/Entity/Entity.cs

@@ -10,6 +10,7 @@ public class Entity
   public ushort EntityType { get; private set; }
   public RagonAuthority Authority { get; private set; }
   public EntityState State { get; private set; }
+  public EntityState Payload { get; private set; }
   
   public Entity(uint ownerId, ushort entityType, RagonAuthority stateAuthority, RagonAuthority eventAuthority)
   {
@@ -17,6 +18,7 @@ public class Entity
     EntityType = entityType;
     EntityId = _idGenerator++;
     State = new EntityState(stateAuthority);
+    Payload = new EntityState(stateAuthority);
     Authority = eventAuthority;
   }
 }

Ragon/Sources/Entity/EntityState.cs

@@ -8,27 +8,31 @@ public class EntityState
 {
   public bool isDirty { get; private set; }
   public RagonAuthority Authority { get; private set; }
-
-  public byte[] Data
-  {
-    get => _data;
-    set
-    {
-      _data = value;
-      isDirty = true;
-    }
-  }
-
-  private byte[] _data = Array.Empty<byte>();
+  public int Size => _size;
+  
+  private int _size = 0;
+  private byte[] _data = new byte[2048];
   
   public EntityState(RagonAuthority ragonAuthority)
   {
     Authority = ragonAuthority;
-    isDirty = true;
+    isDirty = false;
   }
 
-  public void Clear()
+  public ReadOnlySpan<byte> Read()
   {
+    return _data.AsSpan().Slice(0, _size);
+  }
+
+  public void Write(ref ReadOnlySpan<byte> src)
+  {
+    src.CopyTo(_data);
+    _size = src.Length;
     isDirty = true;
   }
+  
+  public void Clear()
+  {
+    isDirty = false;
+  }
 }