fix: resample world_rotations with num_frames

vid2rig/retarget/resample.py

@@ -17,6 +17,13 @@ def resample(clip: MotionClip, target_fps: float) -> MotionClip:
         new_rots[:, j] = slerp_series(clip.local_rotations[:, j], src_t, dst_t)
     new_transl = np.stack([np.interp(dst_t, src_t, clip.root_translation[:, c]) for c in range(3)], axis=1)
 
+    new_world = None
+    if clip.world_rotations is not None:               # MHR path: resample world rots too
+        new_world = np.empty((n_out, J, 4))
+        for j in range(J):
+            new_world[:, j] = slerp_series(clip.world_rotations[:, j], src_t, dst_t)
+
     return replace(clip, fps=target_fps, num_frames=n_out,
                    local_rotations=new_rots, root_translation=new_transl,
-                   root_rotation=new_rots[:, 0].copy())
+                   root_rotation=(new_world if new_world is not None else new_rots)[:, 0].copy(),
+                   world_rotations=new_world)