mujoco / data /test /engine /testdata /island /island_efc.xml
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<!--
test model for constraint islanding:
- 7 equalities (1:joint, 6:connect)
- 1 limit
- 2 friction constraints
- 1 unconstrained dof
- 4 islands, 2 with non-contiguous dofs
-->
<mujoco>
<option>
<flag island="enable"/>
</option>
<default>
<geom size=".1"/>
</default>
<visual>
<headlight diffuse=".9 .9 .9"/>
</visual>
<worldbody>
<body>
<joint type="slide" axis="0 0 1" range="0 1" limited="true"/>
<geom/>
</body>
<body pos=".25 0 0">
<joint type="slide" axis="1 0 0"/>
<geom/>
</body>
<body pos="0 0 0.25">
<joint type="slide" axis="0 0 1"/>
<geom/>
<body pos="0 -.15 0">
<joint name="hinge1" axis="0 1 0"/>
<geom type="capsule" size="0.03" fromto="0 0 0 -.2 0 0"/>
<body pos="-.2 0 0">
<joint axis="0 1 0"/>
<geom type="capsule" size="0.03" fromto="0 0 0 -.2 0 0"/>
</body>
</body>
</body>
<body pos=".5 0 0">
<joint type="slide" axis="0 0 1" frictionloss="15"/>
<geom type="box" size=".08 .08 .02" euler="0 10 0"/>
</body>
<body pos="-.5 0 0">
<joint axis="0 1 0" frictionloss=".01"/>
<geom type="capsule" size="0.03" fromto="0 0 0 -.2 0 0"/>
</body>
<body pos="0 0 .5">
<joint name="hinge2" axis="0 1 0"/>
<geom type="box" size=".08 .02 .08"/>
</body>
<body pos=".5 0 .1">
<freejoint/>
<geom type="box" size=".03 .03 .03" pos="0.01 0.01 0.01"/>
</body>
<site name="0" pos="-.45 -.05 .35"/>
<body pos="-.5 0 .3" name="connect">
<freejoint/>
<geom type="box" size=".05 .05 .05"/>
<site name="1" pos=".05 -.05 .05"/>
</body>
</worldbody>
<equality>
<joint joint1="hinge1" joint2="hinge2"/>
<connect body1="connect" body2="world" anchor="-.05 -.05 .05"/>
<connect site1="0" site2="1"/>
</equality>
</mujoco>