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First step towards a MuJoCo MJCF importer for Bullet. It can load the humanoid.xml, ant.xml and some other OpenAI GYM asset files. Not all fields are converted, so it is work-in-progress. This is useful for Reinforcement Learning experiments, and would also help integration with DeepMind Lab.

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Erwin Coumans
2016-12-30 18:32:57 -08:00
parent 7b9d194bfd
commit fdd517e00f
16 changed files with 1713 additions and 21 deletions
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38
data/mjcf/swimmer.xml Normal file
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<mujoco model="swimmer">
<compiler angle="degree" coordinate="local" inertiafromgeom="true"/>
<option collision="predefined" density="4000" integrator="RK4" timestep="0.01" viscosity="0.1"/>
<default>
<geom conaffinity="1" condim="1" contype="1" material="geom" rgba="0.8 0.6 .4 1"/>
<joint armature='0.1' />
</default>
<asset>
<texture builtin="gradient" height="100" rgb1="1 1 1" rgb2="0 0 0" type="skybox" width="100"/>
<texture builtin="flat" height="1278" mark="cross" markrgb="1 1 1" name="texgeom" random="0.01" rgb1="0.8 0.6 0.4" rgb2="0.8 0.6 0.4" type="cube" width="127"/>
<texture builtin="checker" height="100" name="texplane" rgb1="0 0 0" rgb2="0.8 0.8 0.8" type="2d" width="100"/>
<material name="MatPlane" reflectance="0.5" shininess="1" specular="1" texrepeat="30 30" texture="texplane"/>
<material name="geom" texture="texgeom" texuniform="true"/>
</asset>
<worldbody>
<light cutoff="100" diffuse="1 1 1" dir="-0 0 -1.3" directional="true" exponent="1" pos="0 0 1.3" specular=".1 .1 .1"/>
<geom conaffinity="1" condim="3" material="MatPlane" name="floor" pos="0 0 -0.1" rgba="0.8 0.9 0.8 1" size="40 40 0.1" type="plane"/>
<!-- ================= SWIMMER ================= /-->
<body name="torso" pos="0 0 0">
<geom density="1000" fromto="1.5 0 0 0.5 0 0" size="0.1" type="capsule"/>
<joint axis="1 0 0" name="slider1" pos="0 0 0" type="slide"/>
<joint axis="0 1 0" name="slider2" pos="0 0 0" type="slide"/>
<joint axis="0 0 1" name="rot" pos="0 0 0" type="hinge"/>
<body name="mid" pos="0.5 0 0">
<geom density="1000" fromto="0 0 0 -1 0 0" size="0.1" type="capsule"/>
<joint axis="0 0 1" limited="true" name="rot2" pos="0 0 0" range="-100 100" type="hinge"/>
<body name="back" pos="-1 0 0">
<geom density="1000" fromto="0 0 0 -1 0 0" size="0.1" type="capsule"/>
<joint axis="0 0 1" limited="true" name="rot3" pos="0 0 0" range="-100 100" type="hinge"/>
</body>
</body>
</body>
</worldbody>
<actuator>
<motor ctrllimited="true" ctrlrange="-1 1" gear="150.0" joint="rot2"/>
<motor ctrllimited="true" ctrlrange="-1 1" gear="150.0" joint="rot3"/>
</actuator>
</mujoco>