fake_mir_joint_publisher.py

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#!/usr/bin/env python3
# Copyright (c) 2018-2022, Martin Günther (DFKI GmbH) and contributors
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
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#    * Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
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#    * Redistributions in binary form must reproduce the above copyright
#      notice, this list of conditions and the following disclaimer in the
#      documentation and/or other materials provided with the distribution.
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#    * Neither the name of the copyright holder nor the names of its
#      contributors may be used to endorse or promote products derived from
#      this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
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# Author: Martin Günther
 
import rospy
from sensor_msgs.msg import JointState
 
 
def fake_mir_joint_publisher():
    rospy.init_node('fake_mir_joint_publisher')
    prefix = rospy.get_param('~prefix', '')
    pub = rospy.Publisher('joint_states', JointState, queue_size=10)
    r = rospy.Rate(50.0)
    while not rospy.is_shutdown():
        js = JointState()
        js.header.stamp = rospy.Time.now()
        js.name = [
            prefix + 'left_wheel_joint',
            prefix + 'right_wheel_joint',
            prefix + 'fl_caster_rotation_joint',
            prefix + 'fl_caster_wheel_joint',
            prefix + 'fr_caster_rotation_joint',
            prefix + 'fr_caster_wheel_joint',
            prefix + 'bl_caster_rotation_joint',
            prefix + 'bl_caster_wheel_joint',
            prefix + 'br_caster_rotation_joint',
            prefix + 'br_caster_wheel_joint',
        ]
        js.position = [0.0 for _ in js.name]
        js.velocity = [0.0 for _ in js.name]
        js.effort = [0.0 for _ in js.name]
        pub.publish(js)
        r.sleep()
 
 
if __name__ == '__main__':
    try:
        fake_mir_joint_publisher()
    except rospy.ROSInterruptException:
        pass