Rigify: refactor leg to make modifying the foot roll mechanism easier.

1 files changed, 5 insertions, 0 deletions

diff --git a/rigify/rig_ui_template.py b/rigify/rig_ui_template.py
index 06ff7faf..528a732c 100644
--- a/rigify/rig_ui_template.py
+++ b/rigify/rig_ui_template.py
@@ -130,6 +130,11 @@ def convert_pose_matrix_via_rest_delta(mat, from_bone, to_bone):
     return mat @ from_bone.bone.matrix_local.inverted() @ to_bone.bone.matrix_local
 
 
+def convert_pose_matrix_via_pose_delta(mat, from_bone, to_bone):
+    """Convert pose of one bone to another bone, preserving the current pose difference between them."""
+    return mat @ from_bone.matrix.inverted() @ to_bone.matrix
+
+
 def get_local_pose_matrix(pose_bone):
     """ Returns the local transform matrix of the given pose bone.
     """