Version 2.1.2: Python bindings, OBJ assets support, bugfixes.

PiperOrigin-RevId: 434731612
Change-Id: I0cfda3e7a3d1c72036764986efc252ffa1b8c6b0

unity/Tests/Editor/Tools/Resources/ValidModel.xml

@@ -0,0 +1,30 @@
+<!--
+ Copyright 2019 DeepMind Technologies Limited
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<mujoco>
+  <option gravity="0 -9.81 0" />
+  <worldbody>
+    <geom name="ground" type="plane" size="5 5 1" euler="-90 0 0"/>
+    <body name="parent" pos="0 10 0">
+      <geom name="parent_shape" type="sphere" size="0.5"/>
+      <joint type="free" />
+      <body name="child" pos="2 1 0">
+        <geom name="child_shape" type="sphere" size="0.5"/>
+        <joint type="hinge" axis="1 0 0"/>
+      </body>
+    </body>
+  </worldbody>
+</mujoco>