robots/unitree_dex3-1/urdf/unitree_dex3_left.urdf

<robot name="dex3_left">
  <mujoco>
    <compiler meshdir="meshes" discardvisual="false" />
  </mujoco>

  <!-- [CAUTION] uncomment when convert to mujoco -->
  <!-- <link name="world"></link>
  <joint name="floating_base_joint" type="floating">
    <parent link="world"/>
    <child link="pelvis"/>
  </joint> -->

  <link name="left_hand_palm_link">
    <inertial>
      <origin xyz="0.06214634836 -0.00050869656 -0.00058171093" rpy="0 0 0"/>
      <mass value="0.37283854"/>
      <inertia ixx="0.00027535181027" ixy="-0.00001595519465" ixz="-0.00000242161890" iyy="0.00053951827219" iyz="-0.00000042279435" izz="0.00039623390907"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_palm_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_palm_link.STL"/>
      </geometry>
    </collision>
  </link>
  <joint name="left_hand_thumb_0_joint" type="revolute">
    <origin xyz="0.0255 0 0" rpy="0 0 0"/>
    <axis xyz="0 1 0"/>
    <parent link="left_hand_palm_link"/>
    <child link="left_hand_thumb_0_link"/>
    <limit effort="2.45" velocity="6.857" lower="-1.04719755" upper="1.04719755"/>
  </joint>
  <link name="left_hand_thumb_0_link">
    <inertial>
      <origin xyz="-0.00088424580 -0.00863407079 0.00094429336" rpy="0 0 0"/>
      <mass value="0.08623657"/>
      <inertia ixx="0.00001602919238" ixy="0.00000010683177" ixz="0.00000016728875" iyy="0.00001451795012" iyz="-0.00000051094752" izz="0.00001637877663"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_thumb_0_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_thumb_0_link.STL"/>
      </geometry>
    </collision>
  </link>
  <joint name="left_hand_thumb_1_joint" type="revolute">
    <origin xyz="-0.0025 -0.0193 0" rpy="0 0 0"/>
    <axis xyz="0 0 1"/>
    <parent link="left_hand_thumb_0_link"/>
    <child link="left_hand_thumb_1_link"/>
    <limit effort="1.4" velocity="12" lower="-0.72431163" upper="0.920"/>
  </joint>
  <link name="left_hand_thumb_1_link">
    <inertial>
      <origin xyz="-0.00082788768 -0.03547435774 -0.00038089960" rpy="0 0 0"/>
      <mass value="0.05885070"/>
      <inertia ixx="0.00001274699945" ixy="-0.00000050770784" ixz="0.00000016088850" iyy="0.00000601573947" iyz="-0.00000027839003" izz="0.00001234543582"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_thumb_1_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="-0.001 -0.032 0" rpy="0 0 0"/>
      <geometry>
        <box size="0.02 0.03 0.02"/>
      </geometry>
    </collision>
  </link>
  <joint name="left_hand_thumb_2_joint" type="revolute">
    <origin xyz="0 -0.0458 0" rpy="0 0 0"/>
    <axis xyz="0 0 1"/>
    <parent link="left_hand_thumb_1_link"/>
    <child link="left_hand_thumb_2_link"/>
    <limit effort="1.4" velocity="12" lower="0" upper="1.74532925"/>
  </joint>
  <link name="left_hand_thumb_2_link">
    <inertial>
      <origin xyz="-0.00171735242 -0.02628192939 0.00010778879" rpy="0 0 0"/>
      <mass value="0.02030626"/>
      <inertia ixx="0.00000461267817" ixy="-0.00000003422130" ixz="-0.00000000823881" iyy="0.00000153561368" iyz="-0.00000002549885" izz="0.00000386625776"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_thumb_2_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_thumb_2_link.STL"/>
      </geometry>
    </collision>
  </link>
  <joint name="left_hand_middle_0_joint" type="revolute">
    <origin xyz="0.0777 0.0016 -0.0285" rpy="0 0 0"/>
    <axis xyz="0 0 1"/>
    <parent link="left_hand_palm_link"/>
    <child link="left_hand_middle_0_link"/>
    <limit effort="1.4" velocity="12" lower="-1.57079632" upper="0"/>
  </joint>
  <link name="left_hand_middle_0_link">
    <inertial>
      <origin xyz="0.03547435774 0.00082788768 0.00038089960" rpy="0 0 0"/>
      <mass value="0.05885070"/>
      <inertia ixx="0.00000601573947" ixy="-0.00000050770784" ixz="-0.00000027839003" iyy="0.00001274699945" iyz="0.00000016088850" izz="0.00001234543582"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_middle_0_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_middle_0_link.STL"/>
      </geometry>
    </collision>
  </link>
  <joint name="left_hand_middle_1_joint" type="revolute">
    <origin xyz="0.0458 0 0" rpy="0 0 0"/>
    <axis xyz="0 0 1"/>
    <parent link="left_hand_middle_0_link"/>
    <child link="left_hand_middle_1_link"/>
    <limit effort="1.4" velocity="12" lower="-1.74532925" upper="0"/>
  </joint>
  <link name="left_hand_middle_1_link">
    <inertial>
      <origin xyz="0.02628192939 0.00171735242 -0.00010778879" rpy="0 0 0"/>
      <mass value="0.02030626"/>
      <inertia ixx="0.00000153561368" ixy="-0.00000003422130" ixz="-0.00000002549885" iyy="0.00000461267817" iyz="-0.00000000823881" izz="0.00000386625776"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_middle_1_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_middle_1_link.STL"/>
      </geometry>
    </collision>
  </link>
  <joint name="left_hand_index_0_joint" type="revolute">
    <origin xyz="0.0777 0.0016 0.0285" rpy="0 0 0"/>
    <axis xyz="0 0 1"/>
    <parent link="left_hand_palm_link"/>
    <child link="left_hand_index_0_link"/>
    <limit effort="1.4" velocity="12" lower="-1.57079632" upper="0"/>
  </joint>
  <link name="left_hand_index_0_link">
    <inertial>
      <origin xyz="0.03547435774 0.00082788768 0.00038089960" rpy="0 0 0"/>
      <mass value="0.05885070"/>
      <inertia ixx="0.00000601573947" ixy="-0.00000050770784" ixz="-0.00000027839003" iyy="0.00001274699945" iyz="0.00000016088850" izz="0.00001234543582"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_index_0_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_index_0_link.STL"/>
      </geometry>
    </collision>
  </link>
  <joint name="left_hand_index_1_joint" type="revolute">
    <origin xyz="0.0458 0 0" rpy="0 0 0"/>
    <axis xyz="0 0 1"/>
    <parent link="left_hand_index_0_link"/>
    <child link="left_hand_index_1_link"/>
    <limit effort="1.4" velocity="12" lower="-1.74532925" upper="0"/>
  </joint>
  <link name="left_hand_index_1_link">
    <inertial>
      <origin xyz="0.02628192939 0.00171735242 -0.00010778879" rpy="0 0 0"/>
      <mass value="0.02030626"/>
      <inertia ixx="0.00000153561368" ixy="-0.00000003422130" ixz="-0.00000002549885" iyy="0.00000461267817" iyz="-0.00000000823881" izz="0.00000386625776"/>
    </inertial>
    <visual>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_index_1_link.STL"/>
      </geometry>
      <material name="white">
        <color rgba="0.7 0.7 0.7 1"/>
      </material>
    </visual>
    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <mesh filename="meshes/left_hand_index_1_link.STL"/>
      </geometry>
    </collision>
  </link>

<!-- virtual auxiliary link -->

<!-- for openxr / apple vision pro, good retarget with thumb and index. ==> teleop_hand_and_arm.py -->
  <joint name="base_thumb" type="fixed">
    <parent link="base_link" />
    <child link="base_link_thumb" />
    <origin rpy="0 0 0" xyz="-0.015 0.015 0.02" />
  </joint>
  <joint name="base_index" type="fixed">
    <parent link="base_link" />
    <child link="base_link_index" />
    <origin rpy="0 0 0" xyz="-0.015 0 0" />
  </joint>
  <joint name="base_middle" type="fixed">
    <parent link="base_link" />
    <child link="base_link_middle" />
    <origin rpy="0 0 0" xyz="-0.015 0 -0.03" />
  </joint>
  <joint name="base" type="fixed">
    <parent link="base_link" />
    <child link="left_hand_palm_link" />
    <origin rpy="0 0 -1.57" xyz="0 0 0" />
  </joint>

  <joint name="thumb_tip_joint" type="fixed">
    <parent link="left_hand_thumb_2_link" />
    <child link="thumb_tip" />
    <origin rpy="0 0 0" xyz="0 -0.05 0" />
  </joint>

  <joint name="middle_joint" type="fixed">
    <parent link="left_hand_middle_1_link" />
    <child link="middle_tip" />
    <origin rpy="0 0 0" xyz="0.05 0 0" />
  </joint>

  <joint name="index_joint" type="fixed">
    <parent link="left_hand_index_1_link" />
    <child link="index_tip" />
    <origin rpy="0 0 0" xyz="0.05 0 0" />
  </joint>

  <link name="base_link_thumb">
      <visual>
        <origin xyz="0 0 0" rpy="0 0 0" />
        <geometry>
          <sphere radius="0.005" />
        </geometry>
        <material name="red">
          <color rgba="1 0 0 1" />
        </material>
      </visual>
  </link>
  <link name="base_link_index">
      <visual>
        <origin xyz="0 0 0" rpy="0 0 0" />
        <geometry>
          <sphere radius="0.005" />
        </geometry>
        <material name="green">
          <color rgba="0 1 0 1" />
        </material>
      </visual>
  </link>
  <link name="base_link_middle">
      <visual>
        <origin xyz="0 0 0" rpy="0 0 0" />
        <geometry>
          <sphere radius="0.005" />
        </geometry>
        <material name="blue">
          <color rgba="0 0 1 1" />
        </material>
      </visual>
  </link>
  <link name="base_link">
      <visual>
        <origin xyz="0 0 0" rpy="0 0 0" />
        <geometry>
          <sphere radius="0.01" />
        </geometry>
        <material name="purple">
          <color rgba="1 0 1 1" />
        </material>
      </visual>
  </link>

  <link name="thumb_tip">
    <visual>
      <origin
        xyz="0 0 0"
        rpy="0 0 0" />
      <geometry>
        <sphere radius="0.005"/>
      </geometry>
      <material name="red">
        <color rgba="1 0 0 1" />
      </material>
    </visual>
  </link>

  <link name="index_tip">
    <visual>
      <origin
        xyz="0 0 0"
        rpy="0 0 0" />
      <geometry>
        <sphere radius="0.005"/>
      </geometry>
      <material name="green">
        <color rgba="0 1 0 1" />
      </material>
    </visual>
  </link>

  <link name="middle_tip">
    <visual>
      <origin
        xyz="0 0 0"
        rpy="0 0 0" />
      <geometry>
        <sphere radius="0.005"/>
      </geometry>
      <material name="blue">
        <color rgba="0 0 1 1" />
      </material>
    </visual>
  </link>

 <!-- for mediapipe -->
 <!-- <link name="base_link_thumb" />
 <joint name="base_thumb" type="fixed">
   <parent link="base_link_thumb" />
   <child link="base_link" />
   <origin rpy="0 0 0" xyz="-0.04 0.05 -0.06" />
 </joint>

 <link name="base_link" />
 <joint name="base" type="fixed">
   <parent link="base_link" />
   <child link="left_hand_palm_link" />
   <origin rpy="1.57 -1.57 0" xyz="0.02 -0.01 0" />
 </joint>

   <link name="thumb_tip">
    <visual>
      <origin
        xyz="0 0 0"
        rpy="0 0 0" />
      <geometry>
        <sphere radius="0.005"/>
      </geometry>
      <material name="red">
        <color rgba="1 0 0 1" />
      </material>
    </visual>
  </link>

  <link name="index_tip">
    <visual>
      <origin
        xyz="0 0 0"
        rpy="0 0 0" />
      <geometry>
        <sphere radius="0.005"/>
      </geometry>
      <material name="green">
        <color rgba="0 1 0 1" />
      </material>
    </visual>
  </link>

  <link name="middle_tip">
    <visual>
      <origin
        xyz="0 0 0"
        rpy="0 0 0" />
      <geometry>
        <sphere radius="0.005"/>
      </geometry>
      <material name="blue">
        <color rgba="0 0 1 1" />
      </material>
    </visual>
  </link>

  <joint name="thumb_tip_joint" type="fixed">
    <parent link="left_hand_thumb_2_link" />
    <child link="thumb_tip" />
    <origin rpy="0 0 0" xyz="0.003 -0.05 0" />
  </joint>

  <joint name="middle_joint" type="fixed">
    <parent link="left_hand_middle_1_link" />
    <child link="middle_tip" />
    <origin rpy="0 0 0" xyz="0.05 -0.003 0" />
  </joint>

  <joint name="index_joint" type="fixed">
    <parent link="left_hand_index_1_link" />
    <child link="index_tip" />
    <origin rpy="0 0 0" xyz="0.05 -0.003 0" />
  </joint> -->

</robot>