Feature: Add feature solo-playing

src/LitMotion/Assets/LitMotion.Animation/Editor/LitMotionAnimationEditor.cs

@@ -95,6 +95,23 @@ VisualElement CreateSettingsPanel()
             var box = CreateBox("Settings");
             box.Add(new PropertyField(serializedObject.FindProperty("playOnAwake")));
             box.Add(new PropertyField(serializedObject.FindProperty("animationMode")));
+            box.Add(new PropertyField(serializedObject.FindProperty("solo")));
+            var row = new VisualElement();
+            row.style.flexDirection = FlexDirection.Row;
+            row.Add(new PropertyField(serializedObject.FindProperty("GroupId"), "Group ID, Source")
+            {
+                style = {
+                    flexGrow = 1,
+                    marginRight = 4
+                }
+            });
+            row.Add(new PropertyField(serializedObject.FindProperty("groupIdSource"))
+            {
+                style = {
+                    flexGrow = 1,
+                }
+            });
+            box.Add(row);
             return box;
         }
 

src/LitMotion/Assets/LitMotion.Animation/Runtime/LitMotionAnimation.cs

@@ -16,15 +16,26 @@ enum AnimationMode
 
         [SerializeField] bool playOnAwake = true;
         [SerializeField] AnimationMode animationMode;
+        [SerializeField] bool solo;
+        public string GroupId;
+        [SerializeField] GameObject groupIdSource;
+
 
         [SerializeReference]
         LitMotionAnimationComponent[] components;
 
         Queue<LitMotionAnimationComponent> queue = new();
         FastListCore<LitMotionAnimationComponent> playingComponents;
+        static List<LitMotionAnimation> playingLitMotionAnimations = new();
 
         public IReadOnlyList<LitMotionAnimationComponent> Components => components;
 
+        void Awake()
+        {
+            if (groupIdSource != null)
+                GroupId += groupIdSource.GetInstanceID();
+        }
+
         void Start()
         {
             if (playOnAwake) Play();
@@ -79,6 +90,17 @@ public void Play()
             if (isPlaying) return;
 
             playingComponents.Clear();
+            if (solo)
+            {
+                for (int i = playingLitMotionAnimations.Count - 1; 0 <= i; --i)
+                {
+                    var anim = playingLitMotionAnimations[i];
+                    if (anim == null || anim.StopByGroupId(GroupId))
+                        playingLitMotionAnimations.RemoveAt(i);
+                }
+            }
+            if (!playingLitMotionAnimations.Contains(this))
+                playingLitMotionAnimations.Add(this);
 
             switch (animationMode)
             {
@@ -148,6 +170,16 @@ public void Stop()
             queue.Clear();
         }
 
+        public bool StopByGroupId(string id)
+        {
+            if (GroupId == id || string.IsNullOrEmpty(id))
+            {
+                Stop();
+                return true;
+            }
+            return false;
+        }
+
         public void Restart()
         {
             Stop();
@@ -190,5 +222,12 @@ void OnDestroy()
         {
             Stop();
         }
+
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        static void OnDomainReload()
+        {
+            playingLitMotionAnimations = new();
+        }
+
     }
 }