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KFAttached/Animation/StateMachineBehaviours/AnimatorRandomSwitch.cs

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+using UnityEngine;
+
+[AddComponentMenu("KFAttachments/Utils/Animator Random Switch")]
+public class AnimatorRandomSwitch : StateMachineBehaviour
+{
+    [SerializeField]
+    private string parameter;
+    [SerializeField]
+    private int stateCount;
+
+    private int[] stateHits;
+    int totalHits;
+
+    private void Awake()
+    {
+        stateHits = new int[stateCount];
+        for (int i = 0; i < stateCount; i++)
+        {
+            stateHits[i] = 1;
+        }
+        totalHits = stateCount;
+    }
+
+    public override void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)
+    {
+        int rand = Random.Range(0, totalHits);
+        int cur = 0;
+        bool found = false;
+        for (int i = 0; i < stateHits.Length; i++)
+        {
+            cur += stateHits[i];
+            if (cur > rand && !found)
+            {
+                animator.SetInteger(parameter, i);
+                found = true;
+                stateHits[i] = 1;
+            }
+            else
+            {
+                stateHits[i] = 2;
+            }
+        }
+        totalHits = stateCount * 2 - 1;
+    }
+}