def main():
rospy.init_node('smach_usecase_step_02')
# Create a SMACH state machine
sm0 = StateMachine(outcomes=['succeeded','aborted','preempted'])
# Open the container
with sm0:
# Reset turtlesim
StateMachine.add('RESET',
ServiceState('reset', std_srvs.srv.Empty),
{'succeeded':'SPAWN'})
# Create a second turtle
StateMachine.add('SPAWN',
ServiceState('spawn', turtlesim.srv.Spawn,
request = turtlesim.srv.SpawnRequest(0.0,0.0,0.0,'turtle2')))
# Attach a SMACH introspection server
sis = IntrospectionServer('smach_usecase_01', sm0, '/USE_CASE')
sis.start()
# Execute SMACH tree
outcome = sm0.execute()
# Signal ROS shutdown (kill threads in background)
rospy.spin()
sis.stop()
def main():
rospy.init_node('smach_usecase_step_04')
# Construct static goals
polygon_big = turtle_actionlib.msg.ShapeGoal(edges = 11, radius = 4.0)
polygon_small = turtle_actionlib.msg.ShapeGoal(edges = 6, radius = 0.5)
# Create a SMACH state machine
sm0 = StateMachine(outcomes=['succeeded','aborted','preempted'])
# Open the container
with sm0:
# Reset turtlesim
StateMachine.add('RESET',
ServiceState('reset', std_srvs.srv.Empty),
{'succeeded':'SPAWN'})
# Create a second turtle
StateMachine.add('SPAWN',
ServiceState('spawn', turtlesim.srv.Spawn,
request = turtlesim.srv.SpawnRequest(0.0,0.0,0.0,'turtle2')),
{'succeeded':'TELEPORT1'})
# Teleport turtle 1
StateMachine.add('TELEPORT1',
ServiceState('turtle1/teleport_absolute', turtlesim.srv.TeleportAbsolute,
request = turtlesim.srv.TeleportAbsoluteRequest(5.0,1.0,0.0)),
{'succeeded':'TELEPORT2'})
# Teleport turtle 2
StateMachine.add('TELEPORT2',
ServiceState('turtle2/teleport_absolute', turtlesim.srv.TeleportAbsolute,
request = turtlesim.srv.TeleportAbsoluteRequest(9.0,5.0,0.0)),
{'succeeded':'BIG'})
# Draw a large polygon with the first turtle
StateMachine.add('BIG',
SimpleActionState('turtle_shape1',turtle_actionlib.msg.ShapeAction,
goal = polygon_big),
{'succeeded':'SMALL'})
# Draw a small polygon with the second turtle
StateMachine.add('SMALL',
SimpleActionState('turtle_shape2',turtle_actionlib.msg.ShapeAction,
goal = polygon_small))
# Attach a SMACH introspection server
sis = IntrospectionServer('smach_usecase_01', sm0, '/USE_CASE')
sis.start()
# Set preempt handler
smach.set_preempt_handler(sm0)
# Execute SMACH tree in a separate thread so that we can ctrl-c the script
smach_thread = threading.Thread(target = sm0.execute)
smach_thread.start()
# Signal handler
rospy.spin()
def main():
rospy.init_node('smach_usecase_step_06')
# Construct static goals
polygon_big = turtle_actionlib.msg.ShapeGoal(edges = 11, radius = 4.0)
polygon_small = turtle_actionlib.msg.ShapeGoal(edges = 6, radius = 0.5)
# Create a SMACH state machine
sm0 = StateMachine(outcomes=['succeeded','aborted','preempted'])
# Open the container
with sm0:
# Reset turtlesim
StateMachine.add('RESET',
ServiceState('reset', std_srvs.srv.Empty),
{'succeeded':'SPAWN'})
# Create a second turtle
StateMachine.add('SPAWN',
ServiceState('spawn', turtlesim.srv.Spawn,
request = turtlesim.srv.SpawnRequest(0.0,0.0,0.0,'turtle2')),
{'succeeded':'TELEPORT1'})
# Teleport turtle 1
StateMachine.add('TELEPORT1',
ServiceState('turtle1/teleport_absolute', turtlesim.srv.TeleportAbsolute,
request = turtlesim.srv.TeleportAbsoluteRequest(5.0,1.0,0.0)),
{'succeeded':'TELEPORT2'})
# Teleport turtle 2
StateMachine.add('TELEPORT2',
ServiceState('turtle2/teleport_absolute', turtlesim.srv.TeleportAbsolute,
request = turtlesim.srv.TeleportAbsoluteRequest(9.0,5.0,0.0)),
{'succeeded':'DRAW_SHAPES'})
# Draw some polygons
shapes_cc = Concurrence(
outcomes=['succeeded','aborted','preempted'],
default_outcome='aborted',
outcome_map = {'succeeded':{'BIG':'succeeded','SMALL':'succeeded'}})
StateMachine.add('DRAW_SHAPES',shapes_cc)
with shapes_cc:
# Draw a large polygon with the first turtle
Concurrence.add('BIG',
SimpleActionState('turtle_shape1',turtle_actionlib.msg.ShapeAction,
goal = polygon_big))
# Draw a small polygon with the second turtle
draw_monitor_cc = Concurrence(
['succeeded','aborted','preempted'],
'aborted',
child_termination_cb = lambda so: True,
outcome_map = {
'succeeded':{'DRAW':'succeeded'},
'preempted':{'DRAW':'preempted','MONITOR':'preempted'},
'aborted':{'MONITOR':'invalid'}})
Concurrence.add('SMALL',draw_monitor_cc)
with draw_monitor_cc:
Concurrence.add('DRAW',
SimpleActionState('turtle_shape2',turtle_actionlib.msg.ShapeAction,
goal = polygon_small))
def turtle_far_away(ud, msg):
"""Returns True while turtle pose in msg is at least 1 unit away from (9,5)"""
if sqrt(pow(msg.x-9.0,2) + pow(msg.y-5.0,2)) > 2.0:
return True
return False
Concurrence.add('MONITOR',
MonitorState('/turtle1/pose',turtlesim.msg.Pose,
cond_cb = turtle_far_away))
# Attach a SMACH introspection server
sis = IntrospectionServer('smach_usecase_01', sm0, '/USE_CASE')
sis.start()
# Set preempt handler
smach.set_preempt_handler(sm0)
# Execute SMACH tree in a separate thread so that we can ctrl-c the script
smach_thread = threading.Thread(target = sm0.execute)
smach_thread.start()
# Signal handler
rospy.spin()
def main():
rospy.init_node('smach_usecase_step_06')
# Construct static goals
polygon_big = turtle_actionlib.msg.ShapeGoal(edges = 11, radius = 4.0)
polygon_small = turtle_actionlib.msg.ShapeGoal(edges = 6, radius = 0.5)
# Create a SMACH state machine
sm0 = StateMachine(outcomes=['succeeded','aborted','preempted'])
# Open the container
with sm0:
# Reset turtlesim
StateMachine.add('RESET',
ServiceState('reset', std_srvs.srv.Empty),
{'succeeded':'SPAWN'})
# Create a second turtle
StateMachine.add('SPAWN',
ServiceState('spawn', turtlesim.srv.Spawn,
request = turtlesim.srv.SpawnRequest(0.0,0.0,0.0,'turtle2')),
{'succeeded':'TELEPORT1'})
# Teleport turtle 1
StateMachine.add('TELEPORT1',
ServiceState('turtle1/teleport_absolute', turtlesim.srv.TeleportAbsolute,
request = turtlesim.srv.TeleportAbsoluteRequest(5.0,1.0,0.0)),
{'succeeded':'DRAW_SHAPES'})
# Draw some polygons
shapes_cc = Concurrence(
outcomes=['succeeded','aborted','preempted'],
default_outcome='aborted',
outcome_map = {'succeeded':{'BIG':'succeeded','SMALL':'succeeded'}})
StateMachine.add('DRAW_SHAPES',shapes_cc)
with shapes_cc:
# Draw a large polygon with the first turtle
Concurrence.add('BIG',
SimpleActionState('turtle_shape1',turtle_actionlib.msg.ShapeAction,
goal = polygon_big))
# Draw a small polygon with the second turtle
small_shape_sm = StateMachine(outcomes=['succeeded','aborted','preempted'])
Concurrence.add('SMALL',small_shape_sm)
with small_shape_sm:
# Teleport turtle 2
StateMachine.add('TELEPORT2',
ServiceState('turtle2/teleport_absolute', turtlesim.srv.TeleportAbsolute,
request = turtlesim.srv.TeleportAbsoluteRequest(9.0,5.0,0.0)),
{'succeeded':'DRAW_WITH_MONITOR'})
# Construct a concurrence for the shape action and the monitor
draw_monitor_cc = Concurrence(
['succeeded','aborted','preempted','interrupted'],
'aborted',
child_termination_cb = lambda so: True,
outcome_map = {
'succeeded':{'DRAW':'succeeded'},
'preempted':{'DRAW':'preempted','MONITOR':'preempted'},
'interrupted':{'MONITOR':'invalid'}})
StateMachine.add('DRAW_WITH_MONITOR',
draw_monitor_cc,
{'interrupted':'WAIT_FOR_CLEAR'})
with draw_monitor_cc:
Concurrence.add('DRAW',
SimpleActionState('turtle_shape2',turtle_actionlib.msg.ShapeAction,
goal = polygon_small))
def turtle_far_away(ud, msg):
"""Returns True while turtle pose in msg is at least 1 unit away from (9,5)"""
if sqrt(pow(msg.x-9.0,2) + pow(msg.y-5.0,2)) > 2.0:
return True
return False
Concurrence.add('MONITOR',
MonitorState('/turtle1/pose',turtlesim.msg.Pose,
cond_cb = turtle_far_away))
StateMachine.add('WAIT_FOR_CLEAR',
MonitorState('/turtle1/pose',turtlesim.msg.Pose,
cond_cb = lambda ud,msg: not turtle_far_away(ud,msg)),
{'valid':'WAIT_FOR_CLEAR','invalid':'TELEPORT2'})
# Attach a SMACH introspection server
sis = IntrospectionServer('smach_usecase_01', sm0, '/USE_CASE')
sis.start()
# Set preempt handler
smach.set_preempt_handler(sm0)
# Execute SMACH tree in a separate thread so that we can ctrl-c the script
smach_thread = threading.Thread(target = sm0.execute)
smach_thread.start()
# Signal handler
rospy.spin()