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Further improvements in Bullet MuJoCo MJCF import:

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[MJCF import] improved humanoid.xml, inverted_pendulum.xml import (automatically add dummy-links to connect multiple joints between bodies)
[MJCF import] fix bug in quaternion conversion (w,x,y,z) -> (x,y,z,w)
This commit is contained in:
Erwin Coumans
2017-01-15 11:22:24 -08:00
parent 42ef8f538e
commit 310fabcd7e
9 changed files with 451 additions and 71 deletions
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47
data/mjcf/inverted_double_pendulum.xml Normal file
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<!-- Cartpole Model
The state space is populated with joints in the order that they are
defined in this file. The actuators also operate on joints.
State-Space (name/joint/parameter):
- cart slider position (m)
- pole hinge angle (rad)
- cart slider velocity (m/s)
- pole hinge angular velocity (rad/s)
Actuators (name/actuator/parameter):
- cart motor force x (N)
-->
<mujoco model="cartpole">
<compiler coordinate="local" inertiafromgeom="true"/>
<custom>
<numeric data="2" name="frame_skip"/>
</custom>
<default>
<joint damping="0.05"/>
<geom contype="0" friction="1 0.1 0.1" rgba="0.7 0.7 0 1"/>
</default>
<option gravity="1e-5 0 -9.81" integrator="RK4" timestep="0.01"/>
<size nstack="3000"/>
<worldbody>
<geom name="floor" pos="0 0 -3.0" rgba="0.8 0.9 0.8 1" size="40 40 40" type="plane"/>
<geom name="rail" pos="0 0 0" quat="0.707 0 0.707 0" rgba="0.3 0.3 0.7 1" size="0.02 1" type="capsule"/>
<body name="cart" pos="0 0 0">
<joint axis="1 0 0" limited="true" margin="0.01" name="slider" pos="0 0 0" range="-1 1" type="slide"/>
<geom name="cart" pos="0 0 0" quat="0.707 0 0.707 0" size="0.1 0.1" type="capsule"/>
<body name="pole" pos="0 0 0">
<joint axis="0 1 0" name="hinge" pos="0 0 0" type="hinge"/>
<geom fromto="0 0 0 0 0 0.6" name="cpole" rgba="0 0.7 0.7 1" size="0.045 0.3" type="capsule"/>
<body name="pole2" pos="0 0 0.6">
<joint axis="0 1 0" name="hinge2" pos="0 0 0" type="hinge"/>
<geom fromto="0 0 0 0 0 0.6" name="cpole2" rgba="0 0.7 0.7 1" size="0.045 0.3" type="capsule"/>
<site name="tip" pos="0 0 .6" size="0.01 0.01"/>
</body>
</body>
</body>
</worldbody>
<actuator>
<motor ctrllimited="true" ctrlrange="-1 1" gear="500" joint="slider" name="slide"/>
</actuator>
</mujoco>

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data/mjcf/inverted_pendulum.xml Normal file
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<mujoco model="inverted pendulum">
<compiler inertiafromgeom="true"/>
<default>
<joint armature="0" damping="1" limited="true"/>
<geom contype="0" friction="1 0.1 0.1" rgba="0.7 0.7 0 1"/>
<tendon/>
<motor ctrlrange="-3 3"/>
</default>
<option gravity="0 0 -9.81" integrator="RK4" timestep="0.02"/>
<size nstack="3000"/>
<worldbody>
<!--geom name="ground" type="plane" pos="0 0 0" /-->
<!-- <geom name="rail" pos="0 0 0" quat="0.707 0 0.707 0" rgba="0.3 0.3 0.7 1" size="0.02 1" type="capsule"/> /-->
<body name="cart1" pos="0 0 0">
<joint axis="1 0 0" limited="true" name="slider" pos="0 0 0" range="-1 1" type="slide"/>
<geom name="cart" pos="0 0 0" quat="0.707 0 0.707 0" size="0.1 0.1" type="capsule"/>
<body name="pole" pos="0 0 0">
<joint axis="0 1 0" name="hinge" pos="0 0 0" range="-90 90" type="hinge"/>
<geom fromto="0 0 0 0.001 0 0.6" name="cpole" rgba="0 0.7 0.7 1" size="0.049 0.3" type="capsule"/>
<!-- <body name="pole2" pos="0.001 0 0.6"><joint name="hinge2" type="hinge" pos="0 0 0" axis="0 1 0"/><geom name="cpole2" type="capsule" fromto="0 0 0 0 0 0.6" size="0.05 0.3" rgba="0.7 0 0.7 1"/><site name="tip2" pos="0 0 .6"/></body>-->
</body>
</body>
</worldbody>
<actuator>
<motor gear="100" joint="slider" name="slide"/>
</actuator>
</mujoco>