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KFAttached/RigAdaptors/Adaptors/ChainIKConstraintAdaptor.cs

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+using UnityEngine;
+using UnityEngine.Animations.Rigging;
+
+[AddComponentMenu("")]
+public class ChainIKConstraintAdaptor : RigAdaptorAbs
+{
+    [SerializeField]
+    private string m_Root;
+    [SerializeField]
+    private string m_Tip;
+    [SerializeField]
+    private Transform m_Target;
+    [SerializeField]
+    private float m_ChainRotationWeight;
+    [SerializeField]
+    private float m_TipRotationWeight;
+    [SerializeField]
+    private int m_MaxIterations;
+    [SerializeField]
+    private float m_Tolerance;
+    [SerializeField]
+    private bool m_MaintainTargetPositionOffset;
+    [SerializeField]
+    private bool m_MaintainTargetRotationOffset;
+
+    public override void ReadRigData()
+    {
+        var constraint = GetComponent<ChainIKConstraint>();
+        weight = constraint.weight;
+        m_Root = constraint.data.root?.name;
+        m_Tip = constraint.data.tip?.name;
+        m_Target = constraint.data.target;
+        m_ChainRotationWeight = constraint.data.chainRotationWeight;
+        m_TipRotationWeight = constraint.data.tipRotationWeight;
+        m_MaxIterations = constraint.data.maxIterations;
+        m_Tolerance = constraint.data.tolerance;
+        m_MaintainTargetPositionOffset = constraint.data.maintainTargetPositionOffset;
+        m_MaintainTargetRotationOffset = constraint.data.maintainTargetRotationOffset;
+    }
+
+    public override void FindRigTargets()
+    {
+        var constraint = GetComponent<ChainIKConstraint>();
+        constraint.Reset();
+        constraint.weight = weight;
+        constraint.data.root = targetRoot.FindInAllChildren(m_Root);
+        constraint.data.tip = targetRoot.FindInAllChildren(m_Tip);
+        constraint.data.target = m_Target;
+        constraint.data.chainRotationWeight = m_ChainRotationWeight;
+        constraint.data.tipRotationWeight = m_TipRotationWeight;
+        constraint.data.maxIterations = m_MaxIterations;
+        constraint.data.tolerance = m_Tolerance;
+        constraint.data.maintainTargetPositionOffset = m_MaintainTargetPositionOffset;
+        constraint.data.maintainTargetRotationOffset = m_MaintainTargetRotationOffset;
+    }
+}