Added blender scripts

assets/blender/scripts/mixamo/lib/constraints.py

@@ -0,0 +1,19 @@
+import bpy
+
+def add_copy_transf(p_bone, tgt, subtgt):  
+    cns_transf = p_bone.constraints.get("Copy Transforms")
+    if cns_transf == None:
+        cns_transf = p_bone.constraints.new("COPY_TRANSFORMS")
+        cns_transf.name = "Copy Transforms"
+    cns_transf.target = tgt
+    cns_transf.subtarget = subtgt
+    
+
+def set_constraint_inverse_matrix(cns):
+    # set the inverse matrix of Child Of constraint
+    tar_obj = cns.target
+    subtarget_pbone = tar_obj.pose.bones.get(cns.subtarget)
+    if subtarget_pbone:
+        #cns.inverse_matrix = tar_obj.matrix_world.inverted() @ subtarget_pbone.matrix_basis.inverted()
+        print("reset child of cns", cns.name, cns.subtarget)
+        cns.inverse_matrix = subtarget_pbone.bone.matrix_local.to_4x4().inverted()