From 854ee7481fbe4604e5311bb9f0f41909d8786af5 Mon Sep 17 00:00:00 2001
From: yoship1639 <yoship1639@gmail.com>
Date: Wed, 10 Jun 2020 22:04:35 +0900
Subject: [PATCH 1/2] Fix: SpringBone LateUpdate to FixedUpdate

---
 Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs b/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs
index 8bed39d2f..0bc5fa8a3 100644
--- a/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs
+++ b/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs
@@ -281,7 +281,7 @@ namespace VRM
         }
 
         List<SphereCollider> m_colliderList = new List<SphereCollider>();
-        void LateUpdate()
+        void FixedUpdate()
         {
             if (m_verlet == null || m_verlet.Count == 0)
             {
@@ -312,8 +312,8 @@ namespace VRM
                 }
             }
 
-            var stiffness = m_stiffnessForce * Time.deltaTime;
-            var external = m_gravityDir * (m_gravityPower * Time.deltaTime);
+            var stiffness = m_stiffnessForce * Time.fixedDeltaTime;
+            var external = m_gravityDir * (m_gravityPower * Time.fixedDeltaTime);
 
             foreach (var verlet in m_verlet)
             {

From 6027b800c9076686f1905c51b889ec410be87a95 Mon Sep 17 00:00:00 2001
From: yoship1639 <yoship1639@gmail.com>
Date: Mon, 15 Jun 2020 19:48:35 +0900
Subject: [PATCH 2/2] Fix: Selectable LateUpdate or FIxedUpdate

---
 .../Scripts/SpringBone/VRMSpringBone.cs       | 30 +++++++++++++++++--
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs b/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs
index 0bc5fa8a3..0f40bcb26 100644
--- a/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs
+++ b/Assets/VRM/UniVRM/Scripts/SpringBone/VRMSpringBone.cs
@@ -48,6 +48,14 @@ namespace VRM
         [SerializeField]
         public VRMSpringBoneColliderGroup[] ColliderGroups;
 
+        public enum SpringBoneUpdateType
+        {
+            LateUpdate,
+            FixedUpdate,
+        }
+        [SerializeField]
+        public SpringBoneUpdateType m_updateType = SpringBoneUpdateType.LateUpdate;
+
         /// <summary>
         /// 
         /// original from
@@ -274,6 +282,22 @@ namespace VRM
             }
         }
 
+        void LateUpdate()
+        {
+            if (m_updateType == SpringBoneUpdateType.LateUpdate)
+            {
+                UpdateProcess(Time.deltaTime);
+            }
+        }
+        
+        void FixedUpdate()
+        {
+            if (m_updateType == SpringBoneUpdateType.FixedUpdate)
+            {
+                UpdateProcess(Time.fixedDeltaTime);
+            }
+        }
+
         public struct SphereCollider
         {
             public Vector3 Position;
@@ -281,7 +305,7 @@ namespace VRM
         }
 
         List<SphereCollider> m_colliderList = new List<SphereCollider>();
-        void FixedUpdate()
+        private void UpdateProcess(float deltaTime)
         {
             if (m_verlet == null || m_verlet.Count == 0)
             {
@@ -312,8 +336,8 @@ namespace VRM
                 }
             }
 
-            var stiffness = m_stiffnessForce * Time.fixedDeltaTime;
-            var external = m_gravityDir * (m_gravityPower * Time.fixedDeltaTime);
+            var stiffness = m_stiffnessForce * deltaTime;
+            var external = m_gravityDir * (m_gravityPower * deltaTime);
 
             foreach (var verlet in m_verlet)
             {