From adea40f0de2f100580bb5741b4f7a3026640fd14 Mon Sep 17 00:00:00 2001
From: moondog <159832633+dog-on-moon@users.noreply.github.com>
Date: Wed, 27 Aug 2025 13:46:07 -0500
Subject: [PATCH] Fix physics interpolation with springbones

---
 scene/3d/spring_bone_simulator_3d.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scene/3d/spring_bone_simulator_3d.cpp b/scene/3d/spring_bone_simulator_3d.cpp
index 5659238cf1..ced3f5876d 100644
--- a/scene/3d/spring_bone_simulator_3d.cpp
+++ b/scene/3d/spring_bone_simulator_3d.cpp
@@ -1660,7 +1660,7 @@ void SpringBoneSimulator3D::reset() {
 
 void SpringBoneSimulator3D::_init_joints(Skeleton3D *p_skeleton, SpringBone3DSetting *setting) {
 	if (setting->center_from == CENTER_FROM_WORLD_ORIGIN) {
-		setting->cached_center = p_skeleton->get_global_transform();
+		setting->cached_center = p_skeleton->get_global_transform_interpolated();
 	} else if (setting->center_from == CENTER_FROM_NODE) {
 		if (setting->center_node == NodePath()) {
 			setting->cached_center = Transform3D();
@@ -1669,7 +1669,7 @@ void SpringBoneSimulator3D::_init_joints(Skeleton3D *p_skeleton, SpringBone3DSet
 			if (!nd) {
 				setting->cached_center = Transform3D();
 			} else {
-				setting->cached_center = nd->get_global_transform().affine_inverse() * p_skeleton->get_global_transform();
+				setting->cached_center = nd->get_global_transform_interpolated().affine_inverse() * p_skeleton->get_global_transform_interpolated();
 			}
 		}
 	} else {