sender.py

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#!/usr/bin/env python
__author__ = 'flier'

import argparse

import rospy
import leap_interface
from leap_motion.msg import leap
from leap_motion.msg import leapros

FREQUENCY_ROSTOPIC_DEFAULT = 0.01
NODENAME = 'leap_pub'
PARAMNAME_FREQ = 'freq'
PARAMNAME_FREQ_ENTIRE = '/' + NODENAME + '/' + PARAMNAME_FREQ

def sender():
    '''
    This method publishes the data defined in leapros.msg to /leapmotion/data
    '''
    rospy.loginfo("Parameter set on server: PARAMNAME_FREQ={}".format(rospy.get_param(PARAMNAME_FREQ_ENTIRE, FREQUENCY_ROSTOPIC_DEFAULT)))

    li = leap_interface.Runner()
    li.setDaemon(True)
    li.start()
    # pub     = rospy.Publisher('leapmotion/raw',leap)
    pub_ros   = rospy.Publisher('leapmotion/data',leapros, queue_size=2)
    rospy.init_node(NODENAME)

    while not rospy.is_shutdown():
        hand_direction_   = li.get_hand_direction()
        hand_normal_      = li.get_hand_normal()
        hand_palm_pos_    = li.get_hand_palmpos()
        hand_pitch_       = li.get_hand_pitch()
        hand_roll_        = li.get_hand_roll()
        hand_yaw_         = li.get_hand_yaw()

        msg = leapros()
        msg.direction.x = hand_direction_[0]
        msg.direction.y = hand_direction_[1]
        msg.direction.z = hand_direction_[2]
        msg.normal.x = hand_normal_[0]
        msg.normal.y = hand_normal_[1]
        msg.normal.z = hand_normal_[2]
        msg.palmpos.x = hand_palm_pos_[0]
        msg.palmpos.y = hand_palm_pos_[1]
        msg.palmpos.z = hand_palm_pos_[2]
        msg.ypr.x = hand_yaw_
        msg.ypr.y = hand_pitch_
        msg.ypr.z = hand_roll_

        fingerNames = ['thumb', 'index', 'middle', 'ring', 'pinky']
        fingerPointNames = ['metacarpal', 'proximal',
                            'intermediate', 'distal', 'tip']
        for fingerName in fingerNames:
            for fingerPointName in fingerPointNames:
                pos = li.get_finger_point(fingerName, fingerPointName)
                for iDim, dimName in enumerate(['x', 'y', 'z']):
                    setattr(getattr(msg, '%s_%s' % (fingerName, fingerPointName)),
                            dimName, pos[iDim])

        # We don't publish native data types, see ROS best practices
        # pub.publish(hand_direction=hand_direction_,hand_normal = hand_normal_, hand_palm_pos = hand_palm_pos_, hand_pitch = hand_pitch_, hand_roll = hand_roll_, hand_yaw = hand_yaw_)
        pub_ros.publish(msg)
        rospy.sleep(rospy.get_param(PARAMNAME_FREQ_ENTIRE, FREQUENCY_ROSTOPIC_DEFAULT))


if __name__ == '__main__':
    try:
        sender()
    except rospy.ROSInterruptException:
        pass