示例#1
0
文件: followme.py 项目: hoppss/husky
def followme( metalog, assertWrite, ipPair ):
    print "Follow Me"
    if metalog is None:
        metalog = MetaLog()
        robot = HuskyROS( filename=metalog.getLog("node"), replay=metalog.replay, ipPair=ipPair )
        print "started"
        scanner = ScannerThread()
        scanner.start()
        scannerFn = SourceLogger( sourceGet=scanner.get, filename=metalog.getLog("scanner") ).get
    else:
        robot = HuskyROS( filename=metalog.getLog("node"), replay=True, assertWrite=assertWrite, ipPair=ipPair ) # TODO move assert to metalog
        scannerFn = SourceLogger( sourceGet=None, filename=metalog.getLog("scanner") ).get
    maxSpeed = 0.5
    safeDist = 0.5
    limitDist = 1.5
    index = 0
    prev = None
    turn = 0.0
    personDetected = False
    while True:
        minDist = scannerFn()
        if minDist is not None:
            prev = minDist[0]/1000.0
            turnDiff = 160-minDist[1]
            turn = -math.radians(turnDiff)/4.0
            print prev, turnDiff

        if prev is None or prev < safeDist:
            robot.setSpeedPxPa( 0, turn/4 )
        elif prev < safeDist*2:
            robot.setSpeedPxPa( maxSpeed*(prev-safeDist)/safeDist, turn/2 )
        elif prev < limitDist:
            robot.setSpeedPxPa( maxSpeed, turn )
        else:
            robot.setSpeedPxPa( 0, 0 )
        robot.update()
    robot.setSpeedPxPa( 0, 0 )
    robot.update()
    log.write("%d\n" % index )
    log.close()

    if not metalog.replay:
        scanner.requestStop()
        scanner.join()
示例#2
0
def attach_processor(robot, metalog, callback):
    # TODO assert called at most once
    name = 'proc'
    robot.proc_data = None
    proc_log_name = metalog.getLog(name)
    if proc_log_name is None:
        print("Processor is not logged")

        return False
    print(proc_log_name)
    if metalog.replay:
        robot.proc = DummySensor()
        function = SourceLogger(None, proc_log_name).get
    else:
        robot.extensions.append(('proc_in', camera_filler))
        robot.proc = Processor(callback)
        function = SourceLogger(robot.proc.get_result, proc_log_name).get
    robot.register_data_source('proc', function, proc_data_extension)
    robot.proc.start()
    robot.threads.append(robot.proc)
    return True
示例#3
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def battery(metalog, assertWrite, ipPair):
    if metalog is None:
        metalog = MetaLog()
        robot = HuskyROS(filename=metalog.getLog("node"),
                         replay=metalog.replay,
                         ipPair=ipPair)
    else:
        robot = HuskyROS(filename=metalog.getLog("node"),
                         replay=True,
                         assertWrite=assertWrite,
                         ipPair=ipPair)  # TODO move assert to metalog
        scannerFn = SourceLogger(sourceGet=None,
                                 filename=metalog.getLog("scanner")).get
    robot.setSpeedPxPa(0, 0)
    for i in xrange(10):
        robot.update()
    print "Battery: %.3f" % robot.power
示例#4
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def demo(metalog):
    assert metalog is not None

    can_log_name = metalog.getLog('can')
    if metalog.replay:
        if metalog.areAssertsEnabled():
            can = CAN(ReplayLog(can_log_name), skipInit=True)
        else:
            can = CAN(ReplayLogInputsOnly(can_log_name), skipInit=True)
    else:
        can = CAN()
        can.relog(can_log_name)
    can.resetModules(configFn=setup_faster_update)
    robot = JohnDeere(can=can)
    robot.UPDATE_TIME_FREQUENCY = 20.0  # TODO change internal and integrate setup

    robot.localization = None  # TODO

    # GPS
    gps_log_name = metalog.getLog('gps')
    print(gps_log_name)
    if metalog.replay:
        robot.gps = DummySensor()
        function = SourceLogger(None, gps_log_name).get
    else:
        robot.gps = GPS(verbose=0)
        function = SourceLogger(robot.gps.coord, gps_log_name).get
    robot.gps_data = None
    robot.register_data_source('gps', function, gps_data_extension)

    # Velodyne
    velodyne_log_name = metalog.getLog('velodyne_dist')
    print(velodyne_log_name)
    sensor = Velodyne(metalog=metalog)
    if metalog.replay:
        robot.velodyne = DummySensor()
        function = SourceLogger(None, velodyne_log_name).get
    else:
        robot.velodyne = VelodyneThread(sensor)
        function = SourceLogger(robot.velodyne.scan_safe_dist,
                                velodyne_log_name).get
    robot.velodyne_data = None
    robot.register_data_source('velodyne', function, velodyne_data_extension)

    robot.gps.start()  # ASAP so we get GPS fix
    robot.velodyne.start(
    )  # the data source is active, so it is necessary to read-out data

    center(robot)
    wait_for_start(robot)

    moving = False
    robot.desired_speed = 0.5
    start_time = robot.time
    prev_gps = robot.gps_data
    prev_destination_dist = None
    while robot.time - start_time < 30 * 60:  # limit 30 minutes
        robot.update()
        if robot.gps_data != prev_gps:
            print(robot.time, robot.gas, robot.gps_data, robot.velodyne_data)
            prev_gps = robot.gps_data
        dist = None
        if robot.velodyne_data is not None:
            dist_index = None
            if len(robot.velodyne_data) == 2:
                index, dist = robot.velodyne_data
            else:
                index, dist, dist_index = robot.velodyne_data
            if dist is not None:
                dist = min(dist)  # currently supported tupple of readings
        if moving:
            if dist is None or dist < SAFE_DISTANCE_STOP:
                print("!!! STOP !!! -", robot.velodyne_data)
                #center(robot)
                robot.canproxy.stop()
                moving = False

            elif dist < TURN_DISTANCE:
                if abs(robot.steering_angle) < STRAIGHT_EPS:
                    arr = robot.velodyne_data[1]
                    num = len(arr)
                    left, right = min(arr[:num / 2]), min(arr[num / 2:])
                    print("DECIDE", left, right, robot.velodyne_data)
                    if left <= right:
                        robot.canproxy.set_turn_raw(-100)
                        robot.steering_angle = math.radians(
                            -30)  # TODO replace by autodetect
                    else:
                        robot.canproxy.set_turn_raw(100)
                        robot.steering_angle = math.radians(
                            30)  # TODO replace by autodetect

            elif dist > NO_TURN_DISTANCE:
                if abs(robot.steering_angle) > STRAIGHT_EPS:
                    robot.canproxy.set_turn_raw(0)
                    robot.steering_angle = 0.0  # TODO replace by autodetect

        else:  # not moving
            if dist is not None and dist > SAFE_DISTANCE_GO:
                print("GO", robot.velodyne_data)
                #go(robot)
                robot.canproxy.go()
                moving = True
        if not robot.buttonGo:
            print("STOP!")
            break
    robot.canproxy.stop_turn()
    center(robot)
    robot.velodyne.requestStop()
    robot.gps.requestStop()
示例#5
0
def attach_sensor(robot, sensor_name, metalog):
    assert sensor_name in ['gps', 'laser', 'camera'], sensor_name

    if sensor_name == 'gps':
        # GPS
        gps_log_name = metalog.getLog('gps')
        print(gps_log_name)
        if metalog.replay:
            robot.gps = DummySensor()
            function = SourceLogger(None, gps_log_name).get
        else:
            robot.gps = GPS(verbose=0)
            function = SourceLogger(robot.gps.coord, gps_log_name).get
        robot.gps_data = None
        robot.register_data_source('gps', function, gps_data_extension)
        robot.gps.start()  # ASAP so we get GPS fix
        robot.threads.append(robot.gps)

    elif sensor_name == 'laser':
        # Laser
        laser_log_name = metalog.getLog('laser')
        remission_log_name = metalog.getLog('remission')
        print(laser_log_name, remission_log_name)
        if metalog.replay:
            robot.laser = DummySensor()
            function = SourceLogger(None, laser_log_name).get
            if remission_log_name is not None:
                # remission is only optional, missing in some old log files
                function2 = SourceLogger(None, remission_log_name).get
        else:
            robot.laser = LaserIP(remission=True)
            robot.laser.stopOnExit = False  # for faster boot-up
            function = SourceLogger(robot.laser.scan, laser_log_name).get
            function2 = SourceLogger(robot.laser.remission,
                                     remission_log_name).get
        robot.laser_data = None
        robot.register_data_source('laser', function, laser_data_extension)
        robot.remission_data = None
        if remission_log_name is not None:
            robot.register_data_source('remission', function2,
                                       remission_data_extension)
        robot.laser.start()
        robot.threads.append(robot.laser)

    elif sensor_name == 'camera':
        # Camera
        camera_log_name = metalog.getLog('camera')
        print(camera_log_name)
        if metalog.replay:
            robot.camera = DummySensor()
            function = SourceLogger(None, camera_log_name).get
        else:
            robot.camera = Camera(sleep=0.2)  # TODO
            function = SourceLogger(robot.camera.lastResult,
                                    camera_log_name).get
        robot.camera_data = None
        robot.register_data_source('camera', function, camera_data_extension)
        robot.camera.start()
        robot.threads.append(robot.camera)

    else:
        assert False, sensor_name  # unsuported sensor
示例#6
0
def demo(metalog):
    assert metalog is not None

    can_log_name = metalog.getLog('can')
    if metalog.replay:
        if metalog.areAssertsEnabled():
            can = CAN(ReplayLog(can_log_name), skipInit=True)
        else:
            can = CAN(ReplayLogInputsOnly(can_log_name), skipInit=True)
    else:
        can = CAN()
        can.relog(can_log_name)
    can.resetModules(configFn=setup_faster_update)
    robot = JohnDeere(can=can)
    robot.UPDATE_TIME_FREQUENCY = 20.0  # TODO change internal and integrate setup

    robot.localization = None  # TODO


    # GPS
    gps_log_name = metalog.getLog('gps')
    print gps_log_name
    if metalog.replay:
        robot.gps = DummySensor()
        function = SourceLogger(None, gps_log_name).get
    else:
        robot.gps = GPS(verbose=0)
        function = SourceLogger(robot.gps.coord, gps_log_name).get
    robot.gps_data = None
    robot.register_data_source('gps', function, gps_data_extension) 

    # Laser
    laser_log_name = metalog.getLog('laser')
    print laser_log_name
    if metalog.replay:
        robot.laser = DummySensor()
        function = SourceLogger(None, laser_log_name).get
    else:
        robot.laser = LaserIP()
        function = SourceLogger(robot.laser.scan, laser_log_name).get
    robot.laser_data = None
    robot.register_data_source('laser', function, laser_data_extension) 

    robot.gps.start()  # ASAP so we get GPS fix
    robot.laser.start()

    while robot.gas is None:
        robot.update()

    center(robot)
    wait_for_start(robot)

    moving = False
    robot.desired_speed = 0.5
    start_time = robot.time
    prev_gps = robot.gps_data
    prev_destination_dist = None
    while robot.time - start_time < 30*60:  # limit 30 minutes
        robot.update()
        dist = None
        if robot.laser_data is not None:
            assert len(robot.laser_data) == 541,  len(robot.laser_data)
            distL, distR = min_dist_arr(robot.laser_data[200:-200])
            distL = 20.0 if distL is None else distL
            distR = 20.0 if distR is None else distR
            dist = min(distL, distR)
        if robot.gps_data != prev_gps:
            print robot.time, robot.gas, robot.gps_data, (distL, distR)
            prev_gps = robot.gps_data
        if moving:
            if dist is None or dist < SAFE_DISTANCE_STOP:
                print "!!! STOP !!!",  dist, (distL, distR)
                robot.canproxy.stop()
                moving = False

            elif dist < TURN_DISTANCE:
                if abs(robot.steering_angle) < STRAIGHT_EPS:
                    print "DECIDE", distL, distR
                    if distL <= distR:
                        robot.canproxy.set_turn_raw(-100)
                        robot.steering_angle = math.radians(-30)
                    else:
                        robot.canproxy.set_turn_raw(100)
                        robot.steering_angle = math.radians(30)

            elif dist > NO_TURN_DISTANCE:
                if abs(robot.steering_angle) > STRAIGHT_EPS:
                    robot.canproxy.set_turn_raw(0)
                    robot.steering_angle = 0.0

        else:  # not moving
            if dist is not None and dist > SAFE_DISTANCE_GO:
                print "GO",  dist
                robot.canproxy.go()
                moving = True
        if not robot.buttonGo:
            print "STOP!"
            break
    robot.canproxy.stop_turn()
    center(robot)
    robot.laser.requestStop()
    robot.gps.requestStop()
示例#7
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def ver0(metalog, waypoints=None):
    assert metalog is not None
    assert waypoints is not None  # for simplicity (first is start)

    conv = Convertor(refPoint = waypoints[0]) 
    waypoints = waypoints[1:-1]  # remove start/finish

    can_log_name = metalog.getLog('can')
    if metalog.replay:
        if metalog.areAssertsEnabled():
            can = CAN(ReplayLog(can_log_name), skipInit=True)
        else:
            can = CAN(ReplayLogInputsOnly(can_log_name), skipInit=True)
    else:
        can = CAN()
        can.relog(can_log_name)
    can.resetModules(configFn=setup_faster_update)
    robot = JohnDeere(can=can)
    robot.UPDATE_TIME_FREQUENCY = 20.0  # TODO change internal and integrate setup

    robot.localization = None  # TODO


    # mount_sensor(GPS, robot, metalog)
    gps_log_name = metalog.getLog('gps')
    print gps_log_name
    if metalog.replay:
        robot.gps = DummySensor()
        function = SourceLogger(None, gps_log_name).get
    else:
        robot.gps = GPS(verbose=0)
        function = SourceLogger(robot.gps.coord, gps_log_name).get
    robot.gps_data = None
    robot.register_data_source('gps', function, gps_data_extension) 

    # mount_sensor(VelodyneThread, robot, metalog)
    velodyne_log_name = metalog.getLog('velodyne_dist')
    print velodyne_log_name
    sensor = Velodyne(metalog=metalog)
    if metalog.replay:
        robot.velodyne = DummySensor()
        function = SourceLogger(None, velodyne_log_name).get
    else:
        robot.velodyne = VelodyneThread(sensor)
        function = SourceLogger(robot.velodyne.scan_safe_dist, velodyne_log_name).get
    robot.velodyne_data = None
    robot.register_data_source('velodyne', function, velodyne_data_extension) 

    robot.gps.start()  # ASAP so we get GPS fix
    robot.velodyne.start()  # the data source is active, so it is necessary to read-out data

    center(robot)
    wait_for_start(robot)

    moving = False
    robot.desired_speed = 0.5
    start_time = robot.time
    prev_gps = robot.gps_data
    prev_destination_dist = None
    while robot.time - start_time < 30*60:  # RO timelimit 30 minutes
        robot.update()
        if robot.gps_data != prev_gps:
            print robot.time, robot.gas, robot.gps_data, robot.velodyne_data
            prev_gps = robot.gps_data
            if robot.gps_data is not None:
                dist_arr = [distance( conv.geo2planar((robot.gps_data[1], robot.gps_data[0])), 
                                      conv.geo2planar(destination) ) for destination in waypoints]
                dist = min(dist_arr)
                print "DIST-GPS", dist
                if prev_destination_dist is not None:
                    if prev_destination_dist < dist and dist < 10.0:
                        robot.drop_ball = True
                        # remove nearest
                        i = dist_arr.index(dist)  # ugly, but ...
                        print "INDEX", i
                        del waypoints[i]
                        center(robot)
                        moving = False
                        robot.wait(1.0)
                        robot.drop_ball = False
                        robot.wait(3.0)
                        dist = None
                prev_destination_dist = dist

        dist = None
        if robot.velodyne_data is not None:
            index, dist = robot.velodyne_data
            if dist is not None:
                dist = min(dist)  # currently supported tupple of readings
        if moving:
            if dist is None or dist < SAFE_DISTANCE_STOP:
                print "!!! STOP !!! -",  robot.velodyne_data
                center(robot)
                moving = False

            elif dist < TURN_DISTANCE:
                if abs(robot.steering_angle) < STRAIGHT_EPS:
                    arr = robot.velodyne_data[1]
                    num = len(arr)
                    left, right = min(arr[:num/2]), min(arr[num/2:])
                    print "DECIDE", left, right, robot.velodyne_data
                    if left <= right:
                        robot.pulse_right(RIGHT_TURN_TIME)
                        robot.steering_angle = math.radians(-30)  # TODO replace by autodetect
                    else:
                        robot.pulse_left(LEFT_TURN_TIME)
                        robot.steering_angle = math.radians(30)  # TODO replace by autodetect

            elif dist > NO_TURN_DISTANCE:
                if abs(robot.steering_angle) > STRAIGHT_EPS:
                    if robot.steering_angle < 0:
                        robot.pulse_left(LEFT_TURN_TIME)
                    else:
                        robot.pulse_right(RIGHT_TURN_TIME)
                    robot.steering_angle = 0.0  # TODO replace by autodetect

        else:  # not moving
            if dist is not None and dist > SAFE_DISTANCE_GO:
                print "GO",  robot.velodyne_data
                go(robot)
                moving = True
        if not robot.buttonGo:
            print "STOP!"
            break
    center(robot)
    robot.velodyne.requestStop()
    robot.gps.requestStop()
示例#8
0
def drive_remotely(metalog):
    assert metalog is not None
    can_log_name = metalog.getLog('can')
    if metalog.replay:
        if metalog.areAssertsEnabled():
            can = CAN(ReplayLog(can_log_name), skipInit=True)
        else:
            can = CAN(ReplayLogInputsOnly(can_log_name), skipInit=True)
    else:
        can = CAN()
        can.relog(can_log_name)
    can.resetModules(configFn=setup_faster_update)
    robot = JohnDeere(can=can)
    robot.UPDATE_TIME_FREQUENCY = 20.0  # TODO change internal and integrate setup

    robot.localization = None  # TODO

    soc = metalog.createLoggedSocket('remote', headerFormat=None)  # TODO fix headerFormat
    soc.bind( ('',PORT) )
    if not metalog.replay:
        soc.soc.setblocking(0)
        soc.soc.settimeout( SOCKET_TIMEOUT )
    
    remote_cmd_log_name = metalog.getLog('remote_cmd')
    if metalog.replay:
        robot.remote = DummySensor()
        function = SourceLogger(None, remote_cmd_log_name).get
    else:
        robot.remote = RemoteThread(soc)
        function = SourceLogger(robot.remote.get_data, remote_cmd_log_name).get

    max_speed = None

    robot.remote_data = None
    robot.register_data_source('remote', function, remote_data_extension) 
    robot.remote.start()

    robot.canproxy.stop()
    robot.canproxy.set_turn_raw(0)

    print "Waiting for remote commands ..."
    while robot.remote_data is None:
        robot.update()
    print "received", robot.remote_data.strip()

    moving = False
    turning = False
    while robot.remote_data != 'END\n':
        robot.update()
        if robot.remote_data == 'STOP\n' and (moving or turning):
            if moving:
                robot.canproxy.stop()
                print "STOP"
                moving = False
            if turning:
                robot.canproxy.stop_turn()
                print "STOP turn"
                turning = False
        elif robot.remote_data == 'UP\n' and not moving:
            if max_speed is None:
                robot.canproxy.go()
                print "GO"
            else:
                robot.set_desired_speed(max_speed)
                print "GO", max_speed
            moving = True
        elif robot.remote_data == 'DOWN\n' and not moving:
            if max_speed is None:
                robot.canproxy.go_back()
                print "GO back"
            else:
                robot.set_desired_speed(-max_speed)
                print "GO back", max_speed
            moving = True
        elif robot.remote_data == 'LEFT\n':
            robot.canproxy.set_turn_raw(200)
            print "Left"
            turning = True
        elif robot.remote_data == 'RIGHT\n':
            robot.canproxy.set_turn_raw(-200)
            print "Right"
            turning = True
        elif robot.remote_data == 'SPEED0\n':
            max_speed = None
        elif robot.remote_data.startswith('SPEED'):
            max_speed = int(robot.remote_data[len('SPEED'):])/10.0
            print "Max Speed", max_speed

    print "received", robot.remote_data.strip()

    robot.canproxy.stop_turn()
    robot.remote.requestStop()
    robot.wait(3.0)
示例#9
0
def followme(metalog):
    assert metalog is not None

    can_log_name = metalog.getLog('can')
    if metalog.replay:
        if metalog.areAssertsEnabled():
            can = CAN(ReplayLog(can_log_name), skipInit=True)
        else:
            can = CAN(ReplayLogInputsOnly(can_log_name), skipInit=True)
    else:
        can = CAN()
        can.relog(can_log_name)
    can.resetModules(configFn=setup_faster_update)
    robot = JohnDeere(can=can)
    robot.UPDATE_TIME_FREQUENCY = 20.0  # TODO change internal and integrate setup

    robot.localization = None  # TODO

    # GPS
    gps_log_name = metalog.getLog('gps')
    print gps_log_name
    if metalog.replay:
        robot.gps = DummySensor()
        function = SourceLogger(None, gps_log_name).get
    else:
        robot.gps = GPS(verbose=0)
        function = SourceLogger(robot.gps.coord, gps_log_name).get
    robot.gps_data = None
    robot.register_data_source('gps', function, gps_data_extension)

    # Velodyne
    velodyne_log_name = metalog.getLog('velodyne_dist')
    print velodyne_log_name
    sensor = Velodyne(metalog=metalog)
    if metalog.replay:
        robot.velodyne = DummySensor()
        function = SourceLogger(None, velodyne_log_name).get
    else:
        robot.velodyne = VelodyneThread(sensor)
        function = SourceLogger(robot.velodyne.scan_safe_dist,
                                velodyne_log_name).get
    robot.velodyne_data = None
    robot.register_data_source('velodyne', function, velodyne_data_extension)

    robot.gps.start()  # ASAP so we get GPS fix
    robot.velodyne.start(
    )  # the data source is active, so it is necessary to read-out data

    center(robot)
    wait_for_start(robot)

    moving = False
    target_detected = False
    robot.desired_speed = 0.5
    start_time = robot.time
    prev_gps = robot.gps_data
    prev_destination_dist = None
    while robot.time - start_time < 30 * 60:  # limit 30 minutes
        robot.update()
        if robot.gps_data != prev_gps:
            if robot.velodyne_data is not None:
                print(robot.velodyne_data[-1], robot.canproxy.wheel_angle_raw,
                      robot.canproxy.desired_wheel_angle_raw)
            prev_gps = robot.gps_data

        dist, dist_index = None, None
        if robot.velodyne_data is not None:

            if len(robot.velodyne_data) == 2:
                index, dist = robot.velodyne_data
            else:
                index, dist, dist_index = robot.velodyne_data
            if dist is not None:
                dist = min(dist)  # currently supported tupple of readings

        if dist_index is not None:
            target_index, target_dist = dist_index
            robot.canproxy.set_turn_raw(int((-100 / 45.) * target_index))
            target_detected = target_dist < TARGET_DISTANCE
        else:
            dist_index = False

        if moving:
            if dist is None or dist < SAFE_DISTANCE_STOP or not target_detected:
                print "!!! STOP !!! -", robot.velodyne_data
                robot.canproxy.stop()
                moving = False

        else:  # not moving
            if dist is not None and dist > SAFE_DISTANCE_GO:
                print "GO", target_detected, robot.velodyne_data
                if target_detected:
                    robot.canproxy.go_slowly()
                    moving = True
        if not robot.buttonGo:
            print "STOP!"
            break
    robot.canproxy.stop_turn()
    center(robot)
    robot.velodyne.requestStop()
    robot.gps.requestStop()
示例#10
0
def go(metalog, assertWrite, ipPair):
    print "Go straight ..."
    if metalog is None:
        metalog = MetaLog()
        robot = HuskyROS(filename=metalog.getLog("node"),
                         replay=metalog.replay,
                         ipPair=ipPair)
        print "started"
        scanner = ScannerThread()
        scanner.start()
        scannerFn = SourceLogger(sourceGet=scanner.get,
                                 filename=metalog.getLog("scanner")).get
    else:
        scanner = DummyScanner()  # only for access to scanner saveImages
        robot = HuskyROS(filename=metalog.getLog("node"),
                         replay=True,
                         assertWrite=assertWrite,
                         ipPair=ipPair)  # TODO move assert to metalog
        scannerFn = SourceLogger(sourceGet=None,
                                 filename=metalog.getLog("scanner")).get
    maxSpeed = 0.25
    safeDist = 0.5
    limitDist = 1.5
    index = 0
    prev = None
    obstacleDir = 0.0
    personDetected = False
    pauseCount = 0  # TODO use time instead
    while True:
        minDist = scannerFn()
        scanner.saveImages = not robot.emergencyStopPressed
        if minDist is not None:
            prev = minDist[0] / 1000.0
            turnDiff = 160 - minDist[1]  # only flip
            obstacleDir = -math.radians(
                turnDiff) / 4.0  # TODO calibration via FOV
            print prev, turnDiff, robot.power, robot.emergencyStopPressed

        if robot.emergencyStopPressed:
            pauseCount = 10
        else:
            pauseCount = max(0, pauseCount - 1)
        if prev is None or prev < safeDist or pauseCount > 0:
            robot.setSpeedPxPa(0, 0)
        elif prev < safeDist * 2:
            # turn in place
            if obstacleDir > 0:  # i.e. on the left
                robot.setSpeedPxPa(0.0, math.radians(-10))
            else:
                robot.setSpeedPxPa(0.0, math.radians(10))


#            robot.setSpeedPxPa( maxSpeed*(prev-safeDist)/safeDist, turn/2 )
#        elif prev < limitDist:
#            robot.setSpeedPxPa( maxSpeed, turn )
        else:
            robot.setSpeedPxPa(maxSpeed, 0)
        robot.update()
    robot.setSpeedPxPa(0, 0)
    robot.update()
    log.write("%d\n" % index)
    log.close()

    if not metalog.replay:
        scanner.requestStop()
        scanner.join()