Bump Newton pin to v1.2.0rc1 and rename per-env labels in replication

The Newton 1.2 release includes the upstream tendon-scoping fix
(newton-physics/newton#2659), which scopes ``parse_usd``'s custom-
frequency walk to ``root_path`` natively. Bumping the Newton pin
removes the cross-source ``MjcTendon`` contamination IsaacLab
previously had to work around at the framework layer.

Pin bumps:

* ``source/isaaclab/setup.py``: ``warp-lang==1.12.0`` →
  ``>=1.13.0``, ``mujoco==3.6.0`` → ``==3.8.0``,
  ``mujoco-warp==3.6.0`` → ``==3.8.0.1``.
* ``source/isaaclab_newton/setup.py``: same mujoco / mujoco-warp
  bumps; Newton pin → ``v1.2.0rc1``.
* ``source/isaaclab_visualizers/setup.py``: 3 × Newton pin →
  ``v1.2.0rc1``.

Code adapts:

* ``source/isaaclab_newton/isaaclab_newton/physics/newton_manager.py``
  and ``source/isaaclab_ov/isaaclab_ov/renderers/ovrtx_renderer_kernels.py``:
  ``wp.math.transform_to_matrix`` → ``wp.transform_to_matrix``. The
  ``wp.math`` namespace was removed in ``warp-lang`` 1.13.

Per-env label rename:

* ``_rename_builder_labels`` now walks string-typed custom-attribute
  columns whose frequency declares a ``references="world"``
  companion (e.g. ``mujoco:tendon_label``), rewriting the per-row
  source-path prefix to the destination world root. ``constraint_mimic``
  joins the built-in label pass. The prefix match uses a path-separator
  boundary so source paths that share a string prefix
  (``/Sources/protoA`` vs ``/Sources/protoAB``) do not cross-
  contaminate. Newton's ``add_builder`` copies labels verbatim and
  tracks env identity in ``*_world`` int columns; the IL rename is
  the structural translation between Newton's labeling model and
  IL's per-env USD-path model. Both passes (built-in label arrays
  and string custom-attribute columns) remain necessary after the
  Newton bump.

Adds ``test_rename_builder_labels.py`` with 10 cases covering the
two passes, multi-source prefix-overlap regression, sparse env ids,
multi-frequency, multiple string columns at one frequency, and
empty-values pass-through.

Author: hujc7

source/isaaclab/setup.py

@@ -30,12 +30,12 @@
     # procedural-generation
     "trimesh",
     "pyglet>=2.1.6,<3",
-    "mujoco==3.6.0",
-    "mujoco-warp==3.6.0",
+    "mujoco==3.8.0",
+    "mujoco-warp==3.8.0.1",
     # image processing
     "transformers==4.57.6",
     "einops",  # needed for transformers, doesn't always auto-install
-    "warp-lang==1.12.0",
+    "warp-lang>=1.13.0",
     "matplotlib>=3.10.3",  # minimum version for Python 3.12 support
     # make sure this is consistent with isaac sim version
     "pillow==12.1.1",

source/isaaclab_newton/changelog.d/jichuanh-newton-replicate-tendon-fix.rst

@@ -0,0 +1,30 @@
+Changed
+^^^^^^^
+
+* Bumped Newton pin to ``v1.2.0rc1``, which requires ``warp-lang>=1.13.0``,
+  ``mujoco==3.8.0``, and ``mujoco-warp==3.8.0.1``. Pins updated in
+  :mod:`isaaclab`, :mod:`isaaclab_newton`, and :mod:`isaaclab_visualizers`
+  setup. The Newton 1.2 release scopes ``parse_usd``'s custom-frequency
+  walk to ``root_path`` natively (`newton-physics/newton#2659
+  <https://github.com/newton-physics/newton/pull/2659>`_), removing the
+  cross-source ``MjcTendon`` contamination IsaacLab previously had to work
+  around at the framework layer.
+* Updated ``wp.math.transform_to_matrix`` to ``wp.transform_to_matrix`` in
+  :mod:`~isaaclab_newton.physics.newton_manager` and
+  :mod:`~isaaclab_ov.renderers.ovrtx_renderer_kernels` to match the
+  ``warp-lang`` 1.13 API (the ``wp.math`` namespace was removed).
+
+Fixed
+^^^^^
+
+* Fixed per-environment string identifiers (e.g. ``mujoco:tendon_label``)
+  keeping the source proto path after replication.
+  :func:`~isaaclab_newton.cloner.newton_replicate._rename_builder_labels`
+  now also walks string-typed custom-attribute columns whose frequency
+  declares a ``references="world"`` companion, rewriting their per-row
+  source-path prefix to the destination world root in the same pass that
+  handles built-in label arrays. Adds ``constraint_mimic`` to that
+  built-in pass for completeness. The prefix match uses a
+  path-separator boundary so a source path that is a string prefix of
+  another (e.g. ``/Sources/protoA`` vs ``/Sources/protoAB``) does not
+  cross-contaminate during the rename.

source/isaaclab_newton/isaaclab_newton/cloner/newton_replicate.py

@@ -121,6 +121,14 @@ def _rename_builder_labels(
 ) -> None:
     """Rename builder labels/keys from source roots to destination roots.
 
+    Walks both built-in label arrays (``body``, ``joint``, ``shape``,
+    ``articulation``, ``constraint_mimic``) and any string-typed custom-attribute
+    column whose frequency declares a sibling world column (``references="world"``).
+    The ``startswith(src_prefix)`` guard makes the rewrite a no-op for strings that
+    are not paths under the source, so non-path custom string columns are passed
+    through untouched and any future solver-registered string column is handled
+    automatically without changes here.
+
     Args:
         builder: Newton model builder to update in-place.
         sources: Source prim root paths.
@@ -130,21 +138,51 @@ def _rename_builder_labels(
     """
     # per-source, per-world renaming (strict prefix swap), compact style preserved
     for i, src_path in enumerate(sources):
-        src_prefix_len = len(src_path.rstrip("/"))
+        # Boundary-terminated prefix prevents over-matching when one source path is a
+        # prefix of another (e.g. ``/Sources/protoA`` vs ``/Sources/protoAB``).
+        src_prefix = src_path.rstrip("/") + "/"
+        src_prefix_len = len(src_prefix) - 1  # slice index keeps the leading "/" in the suffix
         swap = lambda name, new_root: new_root + name[src_prefix_len:]  # noqa: E731
         world_cols = torch.nonzero(mapping[i], as_tuple=True)[0].tolist()
         # Map Newton world IDs (sequential) to destination paths using env_ids
         world_roots = {int(env_ids[c]): destinations[i].format(int(env_ids[c])) for c in world_cols}
 
-        for t in ("body", "joint", "shape", "articulation"):
-            labels = getattr(builder, f"{t}_label", None)
-            if labels is None:
-                labels = getattr(builder, f"{t}_key")
-            worlds_arr = getattr(builder, f"{t}_world")
-            for k, w in enumerate(worlds_arr):
-                world_id = int(w)
-                if world_id in world_roots and labels[k].startswith(src_path):
-                    labels[k] = swap(labels[k], world_roots[world_id])
+        def _rename_pair(values, worlds):
+            # ``values`` and ``worlds`` are required to be the same length by the call
+            # sites; ``min`` is defensive against a future builder oddity.
+            n = min(len(values), len(worlds))
+            for k in range(n):
+                world_id = int(worlds[k])
+                if world_id in world_roots and isinstance(values[k], str) and values[k].startswith(src_prefix):
+                    values[k] = swap(values[k], world_roots[world_id])
+
+        # Pass 1: built-in label arrays. Each has a paired ``*_world`` int column.
+        for t in ("body", "joint", "shape", "articulation", "constraint_mimic"):
+            labels = getattr(builder, f"{t}_label", None) or getattr(builder, f"{t}_key", None)
+            worlds_arr = getattr(builder, f"{t}_world", None)
+            if labels is None or worlds_arr is None:
+                continue
+            _rename_pair(labels, worlds_arr)
+
+        # Pass 2: string-typed custom-attribute columns (e.g. ``mujoco:tendon_label``)
+        # paired with a world companion declared via ``references="world"``. Index
+        # world companions by frequency for O(1) lookup, then walk the str columns.
+        custom = builder.custom_attributes
+        world_by_freq: dict[str, ModelBuilder.CustomAttribute] = {}
+        for attr in custom.values():
+            if getattr(attr, "references", None) == "world":
+                world_by_freq[attr.frequency] = attr
+        for attr in custom.values():
+            if attr.dtype is not str:
+                continue
+            world_attr = world_by_freq.get(attr.frequency)
+            if world_attr is None:
+                continue
+            values = attr.values
+            worlds = world_attr.values
+            if not values or not worlds:
+                continue
+            _rename_pair(values, worlds)
 
 
 def newton_physics_replicate(

source/isaaclab_newton/isaaclab_newton/physics/newton_manager.py

@@ -69,7 +69,7 @@ def _set_fabric_transforms(
     i = int(wp.tid())
     idx = int(newton_indices[i])
     transform = newton_body_q[idx]
-    fabric_transforms[i] = wp.transpose(wp.mat44d(wp.math.transform_to_matrix(transform)))
+    fabric_transforms[i] = wp.transpose(wp.mat44d(wp.transform_to_matrix(transform)))
 
 
 @wp.kernel(enable_backward=False)

source/isaaclab_newton/setup.py

@@ -38,10 +38,10 @@ def run(self):
 EXTRAS_REQUIRE = {
     "all": [
         "prettytable==3.3.0",
-        "mujoco==3.6.0",
-        "mujoco-warp==3.6.0",
+        "mujoco==3.8.0",
+        "mujoco-warp==3.8.0.1",
         "PyOpenGL-accelerate==3.1.10",
-        "newton @ git+https://github.com/newton-physics/newton.git@a27277ed49d6f307b8a1e4c394be7e1d14965a62",
+        "newton @ git+https://github.com/newton-physics/newton.git@v1.2.0rc1",
     ],
 }