From cf488a65243476636dc401e97f40139e5d49ccbc Mon Sep 17 00:00:00 2001
From: AoiKamishiro <aoi.kamishiro@kamishiro.online>
Date: Tue, 1 Jul 2025 10:21:54 +0900
Subject: [PATCH] =?UTF-8?q?=E5=8F=AF=E8=AA=AD=E6=80=A7=E3=81=AE=E5=90=91?=
 =?UTF-8?q?=E4=B8=8A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
index 9305d2662..35a2f9dd5 100644
--- a/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
+++ b/Assets/UniGLTF/Runtime/SpringBoneJobs/FastSpringBoneConbinedBuffer.cs
@@ -5,6 +5,7 @@ using Unity.Burst;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using UniGLTF.Runtime.Utils;
 using UniGLTF.SpringBoneJobs.Blittables;
 using UniGLTF.SpringBoneJobs.InputPorts;
 using Unity.Collections;
@@ -325,7 +326,7 @@ namespace UniGLTF.SpringBoneJobs
                         }
 
                         var tail = Transforms[tailIndex];
-                        var tailPos = center.HasValue ? math.mul(center.Value.worldToLocalMatrix, new float4(tail.position, 1.0f)).xyz : tail.position;
+                        var tailPos = center.HasValue ? MathHelper.MultiplyPoint3x4(center.Value.worldToLocalMatrix, tail.position) : tail.position;
                         CurrentTails[jointIndex] = tailPos;
                         PrevTails[jointIndex] = tailPos;
                         NextTails[jointIndex] = tailPos;