testss

Library/PackageCache/com.unity.2d.animation@6.0.1/IK/Runtime/IKUtility.cs

@@ -0,0 +1,70 @@
+using UnityEngine.Scripting.APIUpdating;
+
+namespace UnityEngine.U2D.IK
+{
+    /// <summary>
+    /// General utilities for 2D IK.
+    /// </summary>
+    [MovedFrom("UnityEngine.Experimental.U2D.IK")]
+    public class IKUtility
+    {
+        /// <summary>
+        /// Check if a Unity Transform is a descendent of another Unity Transform.
+        /// </summary>
+        /// <param name="transform">Unity Transform to check.</param>
+        /// <param name="ancestor">Unity Transform ancestor.</param>
+        /// <returns>Returns true if the Unity Transform is a descendent. False otherwise.</returns>
+        public static bool IsDescendentOf(Transform transform, Transform ancestor)
+        {
+            Debug.Assert(transform != null, "Transform is null");
+
+            Transform currentParent = transform.parent;
+
+            while (currentParent)
+            {
+                if (currentParent == ancestor)
+                    return true;
+
+                currentParent = currentParent.parent;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Gets the hierarchy depth of a Unity Transform.
+        /// </summary>
+        /// <param name="transform">Unity Transform to check.</param>
+        /// <returns>Integer value for hierarchy depth.</returns>
+        public static int GetAncestorCount(Transform transform)
+        {
+            Debug.Assert(transform != null, "Transform is null");
+
+            int ancestorCount = 0;
+
+            while (transform.parent)
+            {
+                ++ancestorCount;
+
+                transform = transform.parent;
+            }
+
+            return ancestorCount;
+        }
+
+        /// <summary>
+        /// Gets the maximum chain count for a IKChain2D.
+        /// </summary>
+        /// <param name="chain">IKChain2D to query.</param>
+        /// <returns>Integer value for the maximum chain count.</returns>
+        public static int GetMaxChainCount(IKChain2D chain)
+        {
+            int maxChainCount = 0;
+
+            if (chain.effector)
+                maxChainCount = GetAncestorCount(chain.effector) + 1;
+
+            return maxChainCount;
+        }
+    }
+}