Exemplo n.º 1
0
class TimerActionServer(object):
    def __init__(self, node_name):
        self.action_server = MultiGoalActionServer(node_name, TimerAction, auto_start=False)
        self.action_server.register_goal_callback(self.goal_callback)
        self.action_server.register_preempt_callback(self.preempt_callback)
        self.timers = {}
        self.timers_lock = threading.RLock()

    def start_server(self):
        self.action_server.start()

    def goal_callback(self, goal_handle):
        print "TIMER STARTED"
        new_goal = goal_handle.get_goal()

        with self.timers_lock:
            goal_id = goal_handle.get_goal_id().id
            timer = threading.Timer(new_goal.duration, self.timer_stopped, [goal_handle])
            self.timers[goal_id] = timer
            timer.start()
            self.action_server.publish_feedback(goal_handle, TimerFeedback(current_time=10))

    def preempt_callback(self, goal_handle):
        with self.timers_lock:
            goal_id = goal_handle.get_goal_id().id
            self.timers[goal_id].cancel()
            self.action_server.set_preempted(goal_handle)

    def timer_stopped(self, goal_handle):
        print "TIMER STOPPED"
        result = TimerResult()
        result.success = True

        with self.timers_lock:
            goal_id = goal_handle.get_goal_id().id
            self.timers.pop(goal_id)

        self.action_server.set_succeeded(goal_handle, result=result, text="I succeeded!!!")
class ZoidsteinExpressionServer(object):

    def __init__(self):
        self.action_server = MultiGoalActionServer('expression', ExpressionAction, auto_start=False)
        self.action_server.register_goal_callback(self.goal_callback)
        self.motor_pub = rospy.Publisher('pololu/command', MotorCommand, queue_size=10)
        self.motor_range_srv = rospy.ServiceProxy('pololu/motor_range', MotorRange)
        self.rate = rospy.Rate(10)

    def start(self):
        self.action_server.start()

    def goal_callback(self, goal_handle):
        #self.action_server.set_accepted(goal_handle)
        new_goal = goal_handle.get_goal()
        rospy.loginfo('Accepted new goal: {0}'.format(new_goal))

        found = False
        for name, member in ZoidExpression.__members__.items():
            if name == new_goal.expression:
                found = True

        if not found:
            rospy.logerr('{0} is not a valid expression. Valid expressions are: {1}'.format(new_goal.expression, ZoidExpression))
            self.action_server.set_aborted(goal_handle)
            return

        expression_thread = threading.Thread(target=self.start_expression, args=[goal_handle])
        expression_thread.run()

    def start_expression(self, goal_handle):
        goal = goal_handle.get_goal()

        expression = ZoidExpression[goal.expression]
        speed = goal.speed
        intensity = goal.intensity
        duration = goal.duration

        if expression in [ZoidExpression.smile, ZoidExpression.frown_mouth]:
            joint_name = 'smile_joint'
        elif expression in [ZoidExpression.open_mouth]:
            joint_name = 'jaw_joint'
        elif expression in [ZoidExpression.frown]:
            joint_name = 'brow_joint'

        negative = True
        if expression in [ZoidExpression.smile, ZoidExpression.open_mouth]:
            negative = False

        response = self.motor_range_srv(joint_name)

        msg = MotorCommand()
        msg.joint_name = joint_name

        min_range = min([response.min, response.max])
        max_range = max([response.min, response.max])

        if negative:
            msg.position = interpolate(intensity, 0.0, 1.0, 0.0, min_range)
        else:
            msg.position = interpolate(intensity, 0.0, 1.0, 0.0, max_range)

        msg.speed = interpolate(speed, 0.0, 1.0, 0.0, 0.5)
        msg.acceleration = interpolate(speed, 0.0, 1.0, 0.0, 0.4)

        start = time.time()
        while not rospy.is_shutdown() and not self.action_server.is_preempt_requested(goal_handle) and (time.time() - start) < duration:
            self.motor_pub.publish(msg)
            self.rate.sleep()

        if not self.action_server.is_preempt_requested(goal_handle):
            self.action_server.set_succeeded(goal_handle)
Exemplo n.º 3
0
class ZoidsteinExpressionServer(object):
    def __init__(self):
        self.action_server = MultiGoalActionServer('expression',
                                                   ExpressionAction,
                                                   auto_start=False)
        self.action_server.register_goal_callback(self.goal_callback)
        self.motor_pub = rospy.Publisher('pololu/command',
                                         MotorCommand,
                                         queue_size=10)
        self.motor_range_srv = rospy.ServiceProxy('pololu/motor_range',
                                                  MotorRange)
        self.rate = rospy.Rate(10)

    def start(self):
        self.action_server.start()

    def goal_callback(self, goal_handle):
        #self.action_server.set_accepted(goal_handle)
        new_goal = goal_handle.get_goal()
        rospy.loginfo('Accepted new goal: {0}'.format(new_goal))

        found = False
        for name, member in ZoidExpression.__members__.items():
            if name == new_goal.expression:
                found = True

        if not found:
            rospy.logerr(
                '{0} is not a valid expression. Valid expressions are: {1}'.
                format(new_goal.expression, ZoidExpression))
            self.action_server.set_aborted(goal_handle)
            return

        expression_thread = threading.Thread(target=self.start_expression,
                                             args=[goal_handle])
        expression_thread.run()

    def start_expression(self, goal_handle):
        goal = goal_handle.get_goal()

        expression = ZoidExpression[goal.expression]
        speed = goal.speed
        intensity = goal.intensity
        duration = goal.duration

        if expression in [ZoidExpression.smile, ZoidExpression.frown_mouth]:
            joint_name = 'smile_joint'
        elif expression in [ZoidExpression.open_mouth]:
            joint_name = 'jaw_joint'
        elif expression in [ZoidExpression.frown]:
            joint_name = 'brow_joint'

        negative = True
        if expression in [ZoidExpression.smile, ZoidExpression.open_mouth]:
            negative = False

        response = self.motor_range_srv(joint_name)

        msg = MotorCommand()
        msg.joint_name = joint_name

        min_range = min([response.min, response.max])
        max_range = max([response.min, response.max])

        if negative:
            msg.position = interpolate(intensity, 0.0, 1.0, 0.0, min_range)
        else:
            msg.position = interpolate(intensity, 0.0, 1.0, 0.0, max_range)

        msg.speed = interpolate(speed, 0.0, 1.0, 0.0, 0.5)
        msg.acceleration = interpolate(speed, 0.0, 1.0, 0.0, 0.4)

        start = time.time()
        while not rospy.is_shutdown(
        ) and not self.action_server.is_preempt_requested(goal_handle) and (
                time.time() - start) < duration:
            self.motor_pub.publish(msg)
            self.rate.sleep()

        if not self.action_server.is_preempt_requested(goal_handle):
            self.action_server.set_succeeded(goal_handle)