def create_problem():
"""
Creates a blocksworld STRIPStream problem.
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
BLOCK = Type()
# Fluent predicates
Clear = Pred(BLOCK)
OnTable = Pred(BLOCK)
ArmEmpty = Pred()
Holding = Pred(BLOCK)
On = Pred(BLOCK, BLOCK)
# Free parameters
B1, B2 = Param(BLOCK), Param(BLOCK)
rename_easy(locals())
actions = [
Action(name='pickup', parameters=[B1],
condition=And(Clear(B1), OnTable(B1), ArmEmpty()),
effect=And(Holding(B1), Not(Clear(B1)), Not(OnTable(B1)), Not(ArmEmpty()))),
Action(name='putdown', parameters=[B1],
condition=Holding(B1),
effect=And(Clear(B1), OnTable(B1), ArmEmpty(), Not(Holding(B1)))),
Action(name='stack', parameters=[B1, B2],
condition=And(Clear(B2), Holding(B1)),
effect=And(Clear(B1), On(B1, B2), ArmEmpty(), Not(Clear(B2)), Not(Holding(B1)))),
Action(name='unstack', parameters=[B1, B2],
condition=And(Clear(B1), On(B1, B2), ArmEmpty()),
effect=And(Clear(B2), Holding(B1), Not(Clear(B1)), Not(On(B1, B2)), Not(ArmEmpty()))),
]
axioms = []
cond_streams = []
constants = []
initial_atoms = [
OnTable('A'),
OnTable('B'),
OnTable('C'),
Clear('A'),
Clear('B'),
Clear('C'),
ArmEmpty(),
]
goal_literals = [On('A', 'B'), On('B', 'C')]
return STRIPStreamProblem(initial_atoms, goal_literals, actions + axioms, cond_streams, constants)
def create_problem(time_step=.5, fuel_rate=5, start_fuel=10, goal_p=10):
"""
Creates the Tsiolkovsky rocket problem.
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
STATE, RATE, MASS, TIME = Type(), Type(), Type(), Type()
HEIGHT = Type()
# Fluent predicates
AtState = Pred(STATE)
# Derived predicates
Above = Pred(HEIGHT)
# Static predicates
IsBurst = Pred(STATE, RATE, TIME, STATE)
IsAbove = Pred(STATE, HEIGHT)
# Free parameters
X1, X2 = Param(STATE), Param(STATE)
Q, T = Param(RATE), Param(TIME)
H = Param(HEIGHT)
rename_easy(locals()) # Trick to make debugging easier
####################
actions = [
Action(name='burst',
parameters=[X1, Q, T, X2],
condition=And(AtState(X1), IsBurst(X1, Q, T, X2)),
effect=And(AtState(X2), Not(AtState(X1)))),
]
axioms = [
Axiom(effect=Above(H),
condition=Exists([X1], And(AtState(X1), IsAbove(X1, H)))),
]
####################
# Conditional stream declarations
cond_streams = [
GeneratorStream(inputs=[X1, Q, T],
outputs=[X2],
conditions=[],
effects=[IsBurst(X1, Q, T, X2)],
generator=forward_burst),
TestStream(inputs=[X1, H],
conditions=[],
effects=[IsAbove(X1, H)],
test=lambda (p, v, m), h: p >= h,
eager=True),
]
def create_abstract_problem(state, goal):
# Goal serialization is basically like this
# Necessary and sufficient?
tables, initial_poses, initial_config, holding = state
# TODO: connect this to goals on the actual states
# The quantification of poses and grasps is independent
# Conditions are derived or atoms
actions = [
Action(
name='pick',
parameters=[B, S],
condition=And(On(B, S), HandEmpty()), #, AtConf(Q)),
#condition=And(On(B, S), HandEmpty(), Not(Holding(B))), # , AtConf(Q)),
effect=And(Holding(B), Not(On(B, S)), Not(HandEmpty()))),
Action(
name='place',
parameters=[B, S],
condition=And(Holding(B)), #, AtConf(Q)),
effect=And(On(B, S), HandEmpty(), Not(Holding(B)))),
#Action(name='move', parameters=[S1, Q2],
# condition=AtConf(Q),
# effect=And(AtConf(Q2), Not(AtConf(Q)))),
]
axioms = []
cond_streams = []
initial_atoms = [
#AtConf(initial_config),
HandEmpty()
] + [On(block, pose.sur) for block, pose in initial_poses.items()]
goal_literals = [On(b, s) for b, s in goal.on.items()]
if goal.holding is not None:
goal_literals.append(Holding(goal.holding))
problem = STRIPStreamProblem(initial_atoms, goal_literals,
actions + axioms, cond_streams)
return problem
def convert_goal(self, axiom=True):
from stripstream.pddl.logic.predicates import NamedPredicate
from stripstream.pddl.operators import Action, Axiom
Goal = NamedPredicate('_goal')
if axiom:
operator = Axiom(effect=Goal(), condition=self.goal_literals)
else:
operator = Action(name='_achieve_goal',
parameters=[],
condition=self.goal_literals,
effect=Goal(),
cost=None)
operator.is_internal = True
self.operators.append(operator)
self.goal_literals = Goal()
def abs_action(name,
parameters,
conditions,
effect,
cost=None): # NOTE - using And() to indicate no condition
assert len(conditions) >= 1
refinement = Action(name, parameters, And(*conditions), effect, cost=cost)
for i in reversed(range(1, len(conditions))):
abs_name = '_%s_%s' % (name, i)
abs_condition = And(*conditions[:1])
parameter_pool = abs_condition.get_parameters(
) | effect.get_parameters()
abs_parameters = filter(lambda p: p in parameter_pool, parameters)
abs_cost = (cost if cost is not None else 0) + i * ABS_COST
refinement = RefinableAction(abs_name,
abs_parameters,
abs_condition,
effect,
refinement=[refinement],
cost=abs_cost)
return refinement
At = Predicate(OBJ, LOC)
Clear = Predicate(LOC)
Clean = Predicate(OBJ)
WetPaint = Predicate(OBJ)
DryPaint = Predicate(OBJ)
IsDryer = Predicate(LOC)
IsPainter = Predicate(LOC)
IsWasher = Predicate(LOC)
O, L1, L2 = Param(OBJ), Param(LOC), Param(LOC)
actions = [
Action(name='transport',
parameters=[O, L1, L2],
condition=And(At(O, L1), Clear(L2)),
effect=And(At(O, L2), Clear(L1), Not(At(O, L1)), Not(
Clear(L2)))), # NOTE - Leslie and Tomas call this Move
Action(
name='wash',
parameters=[O, L1],
condition=And(At(O, L1), IsWasher(L1)),
#effect=And(Clean(O)))
effect=And(Clean(O), Not(WetPaint(O)), Not(DryPaint(O)))),
Action(
name='paint',
parameters=[O, L1],
condition=And(At(O, L1), Clean(O), IsPainter(L1)),
#effect=And(WetPaint(O))),
effect=And(WetPaint(O), Not(Clean(O)))),
Action(
def get_actions(operators, static_map, objects):
actions = []
for action, conditions, effects in get_dnf_operators(operators, objects):
actions.append(Action(action.name, action.parameters, And(*conditions), And(*effects)))
return get_operators(actions, static_map, objects, PyAction)
def compile_problem(oracle):
problem = oracle.problem
for obj in problem.goal_poses:
if problem.goal_poses[obj] == 'initial':
problem.goal_poses[obj] = oracle.initial_poses[obj]
elif problem.goal_poses[obj] in oracle.initial_poses: # Goal names other object (TODO - compile with initial)
problem.goal_poses[obj] = oracle.initial_poses[problem.goal_poses[obj]]
####################
def sample_poses(o, num_samples=1):
while True:
if AVOID_INITIAL:
oracle.set_all_object_poses(oracle.initial_poses)
else:
oracle.set_all_object_poses({o: oracle.initial_poses[o]})
yield list(islice(random_region_placements(oracle, o, oracle.get_counters(), region_weights=True), num_samples))
def sample_grasps(o):
yield get_grasps(oracle, o)
def sample_region(o, r, num_samples=1):
while True:
oracle.set_all_object_poses({o: oracle.initial_poses[o]})
yield list(islice(random_region_placements(oracle, o, [r], region_weights=True), num_samples))
def sample_motion(o, p, g, max_calls=1, max_failures=50):
oracle.set_all_object_poses({o: p}) # TODO - saver for the initial state as well?
if oracle.approach_collision(o, p, g):
return
for i in range(max_calls):
pap = PickAndPlace(oracle.get_geom_hash(o), p, g)
if not pap.sample(oracle, o, max_failures=max_failures,
sample_vector=DO_ARM_MOTION, sample_arm=DO_ARM_MOTION, check_base=CHECK_BASE):
break
pap.obj = o
yield [(pap.approach_config, pap)]
def collision_free(o, p, t):
if p is None or o == t.obj:
return True
holding = ObjGrasp(t.obj, t.grasp)
#holding = Holding(self.oracle.get_body_name(pap.geom_hash), pap.grasp)
if not DO_ARM_MOTION:
return not oracle.holding_collision(t.grasp_config, o, p, holding)
return not oracle.traj_holding_collision(t.approach_config, t.trajs, o, p, holding)
####################
# Types
CONF, TRAJ, REG = Type(), Type(), Type()
BLOCK, POSE, GRASP = Type(), Type(), Type()
# Fluent predicates
AtConfig = Pred(CONF)
HandEmpty = Pred()
AtPose = Pred(BLOCK, POSE)
Holding = Pred(BLOCK, GRASP)
# Static predicates
IsPose = Pred(BLOCK, POSE)
IsGrasp = Pred(BLOCK, GRASP)
IsKin = Pred(BLOCK, POSE, GRASP, CONF, TRAJ)
IsCollisionFree = Pred(BLOCK, POSE, TRAJ)
IsContained = Pred(REG, BLOCK, POSE)
# Derived predicates
Safe = Pred(BLOCK, TRAJ)
InRegion = Pred(BLOCK, REG)
# Parameters
O, P, G = Param(BLOCK), Param(POSE), Param(GRASP)
Q, Q2, T = Param(CONF), Param(CONF), Param(TRAJ)
OB, R = Param(BLOCK), Param(REG)
actions = [
Action(name='pick', parameters=[O, P, G, Q, T],
condition=And(AtPose(O, P), HandEmpty(),
IsKin(O, P, G, Q, T), AtConfig(Q),
ForAll([OB], Or(Equal(O, OB), Safe(OB, T)))),
effect=And(Holding(O, G),
Not(HandEmpty()), Not(AtPose(O, P)))),
Action(name='place', parameters=[O, P, G, Q, T],
condition=And(Holding(O, G),
IsKin(O, P, G, Q, T), AtConfig(Q),
ForAll([OB], Or(Equal(O, OB), Safe(OB, T)))),
effect=And(AtPose(O, P), HandEmpty(),
Not(Holding(O, G)))),
Action(name='move', parameters=[Q, Q2],
condition=AtConfig(Q),
effect=And(AtConfig(Q2),
Not(AtConfig(Q))))]
axioms = [
Axiom(effect=InRegion(O, R), condition=Exists([P],
And(AtPose(O, P), IsContained(R, O, P)))),
Axiom(effect=Safe(O, T), condition=Exists([P],
And(AtPose(O, P), IsCollisionFree(O, P, T))))]
cond_streams = [
GenStream(inputs=[O], outputs=[P],
conditions=[],
effects=[IsPose(O, P)],
generator=sample_poses),
GenStream(inputs=[O], outputs=[G],
conditions=[],
effects=[IsGrasp(O, G)],
generator=sample_grasps),
GenStream(inputs=[O, R], outputs=[P],
conditions=[],
effects=[IsPose(O, P), IsContained(R, O, P)],
generator=sample_region),
GenStream(inputs=[O, P, G], outputs=[Q, T],
conditions=[IsPose(O, P), IsGrasp(O, G)],
effects=[IsKin(O, P, G, Q, T)],
generator=sample_motion),
TestStream(inputs=[O, P, T],
conditions=[IsPose(O, P)],
effects=[IsCollisionFree(O, P, T)],
test=collision_free)]
####################
constants = [POSE(None)]
initial_atoms = [AtConfig(oracle.initial_config)] # TODO - toggle
holding = set()
if problem.start_holding is not False:
obj, grasp = problem.start_holding
initial_atoms += [Holding(obj, grasp), AtPose(obj, None), IsGrasp(obj, grasp)]
holding.add(obj)
if not holding:
initial_atoms.append(HandEmpty())
for obj, pose in oracle.initial_poses.iteritems():
if obj not in holding:
initial_atoms += [AtPose(obj, pose), IsPose(obj, pose)]
goal_literals = []
if problem.goal_holding is not None:
if problem.goal_holding is False:
goal_literals.append(HandEmpty())
elif isinstance(problem.goal_holding, ObjGrasp):
goal_literals.append(Holding(problem.goal_holding.object_name, problem.goal_holding.grasp))
elif problem.goal_holding in oracle.get_objects():
goal_literals.append(Holding(problem.goal_holding))
else:
raise Exception()
for obj, pose in problem.goal_poses.iteritems():
goal_literals.append(AtPose(obj, pose))
initial_atoms.append(IsPose(obj, pose))
for obj, region in problem.goal_regions.iteritems():
goal_literals.append(InRegion(obj, region))
goal_formula = goal_literals
return STRIPStreamProblem(initial_atoms, goal_formula, actions + axioms, cond_streams, constants)
def compile_problem(tamp_problem):
"""
Constructs a STRIPStream problem for the countable TMP problem.
:param tamp_problem: a :class:`.TMPProblem`
:return: a :class:`.STRIPStreamProblem`
"""
# NOTE - the simple focused algorithm gives "Could not find instantiation for PNE!" when this is moved outside
B1, B2 = Param(BLOCK), Param(BLOCK)
P1, P2 = Param(POSE), Param(POSE)
Q1, Q2 = Param(CONF), Param(CONF)
actions = [
Action(name='pick',
parameters=[B1, P1, Q1],
condition=And(AtPose(B1, P1), HandEmpty(), AtConf(Q1),
LegalKin(P1, Q1)),
effect=And(Holding(B1), Not(AtPose(B1, P1)), Not(HandEmpty()))),
Action(
name='place',
parameters=[B1, P1, Q1],
condition=And(
Holding(B1),
AtConf(Q1),
LegalKin(P1, Q1),
#ForAll([B2], Or(Equal(B1, B2), Safe(B2, B1, P1)))),
ForAll([B2], Or(Equal(B1, B2), Safe(B2, P1)))),
#*[Or(Equal(B1, BLOCK(b2)), Safe(b2, P1)) for b2 in tamp_problem.initial_poses]),
effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)))),
Action(name='move',
parameters=[Q1, Q2],
condition=AtConf(Q1),
effect=And(AtConf(Q2), Not(AtConf(Q1)))),
]
axioms = [
#Axiom(effect=Safe(B2, B1, P1), condition=Exists([P2], And(AtPose(B2, P2), CollisionFree(B1, P1, B2, P2)))),
Axiom(effect=Safe(B2, P1),
condition=Exists([P2], And(AtPose(B2, P2), CollisionFree(P1,
P2)))),
]
# NOTE - this needs to be inside the method so you make new streams each time
cond_streams = [
#EasyGenStream(inputs=[P2], outputs=[P1], conditions=[], effects=[],
# generator=lambda a: irange(0, NUM_POSES)),
EasyGenStream(inputs=[],
outputs=[P1],
conditions=[],
effects=[],
generator=lambda: irange(0, NUM_POSES)),
EasyGenStream(inputs=[P1],
outputs=[Q1],
conditions=[],
effects=[LegalKin(P1, Q1)],
generator=lambda p: iter([p])),
#EasyTestStream(inputs=[B1, P1, B2, P2], conditions=[], effects=[CollisionFree(B1, P1, B2, P2)],
# test=lambda b1, p1, b2, p2: p1 != p2, eager=EAGER_TESTS),
EasyTestStream(inputs=[P1, P2],
conditions=[],
effects=[CollisionFree(P1, P2)],
test=lambda p1, p2: p1 != p2,
eager=EAGER_TESTS),
]
constants = []
initial_atoms = [
AtConf(tamp_problem.initial_config),
] + [
AtPose(block, pose)
for block, pose in tamp_problem.initial_poses.iteritems()
]
if tamp_problem.initial_holding is False:
initial_atoms.append(HandEmpty())
else:
initial_atoms.append(Holding(tamp_problem.initial_holding, BLOCK))
goal_literals = []
if tamp_problem.goal_holding is False:
goal_literals.append(HandEmpty())
elif tamp_problem.goal_holding is not None:
goal_literals.append(Holding(tamp_problem.goal_holding))
for block, goal in tamp_problem.goal_poses.iteritems():
goal_literals.append(AtPose(block, goal))
return STRIPStreamProblem(initial_atoms, goal_literals, actions + axioms,
cond_streams, constants)
def create_problem(goal, obstacles=(), distance=.25, digits=3):
"""
Creates a Probabilistic Roadmap (PRM) motion planning problem.
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
POINT = Type()
REGION = Type()
# Fluent predicates
AtPoint = Pred(POINT)
# Derived predicates
InRegion = Pred(REGION)
#IsReachable = Pred(POINT, POINT)
IsReachable = Pred(POINT)
# Stream predicates
IsEdge = Pred(POINT, POINT)
Contained = Pred(POINT, REGION)
# Free parameters
P1, P2 = Param(POINT), Param(POINT)
R = Param(REGION)
rename_easy(locals()) # Trick to make debugging easier
####################
actions = [
Action(name='move',
parameters=[P1, P2],
condition=And(AtPoint(P1), IsReachable(P2)),
effect=And(AtPoint(P2), Not(AtPoint(P1))))
]
axioms = [
Axiom(effect=InRegion(R),
condition=Exists([P1], And(AtPoint(P1), Contained(P1, R)))),
Axiom(effect=IsReachable(P2),
condition=Or(AtPoint(P2),
Exists([P1], And(IsReachable(P1), IsEdge(P1,
P2))))),
]
####################
def sampler():
for _ in inf_sequence():
yield [(sample(digits), ) for _ in range(10)]
roadmap = set()
def test(p1, p2):
if not (get_distance(p1, p2) <= distance and is_collision_free(
(p1, p2), obstacles)):
return False
roadmap.add((p1, p2))
return True
####################
# Conditional stream declarations
cond_streams = [
EasyListGenStream(
inputs=[],
outputs=[P1],
conditions=[],
effects=[],
generator=sampler
), # NOTE - version that only generators collision-free points
GeneratorStream(inputs=[R],
outputs=[P1],
conditions=[],
effects=[Contained(P1, R)],
generator=lambda r:
(sample_box(r) for _ in inf_sequence())),
TestStream(inputs=[P1, P2],
conditions=[],
effects=[IsEdge(P1, P2), IsEdge(P2, P1)],
test=test,
eager=True),
]
####################
constants = []
initial_atoms = [
AtPoint((0, 0)),
]
goal_literals = []
if is_region(goal):
goal_literals.append(InRegion(goal))
else:
goal_literals.append(AtPoint(goal))
problem = STRIPStreamProblem(initial_atoms, goal_literals,
actions + axioms, cond_streams, constants)
return problem, roadmap
def create_problem():
"""
Creates the 1D task and motion planning STRIPStream problem.
This models the same problem as :module:`.run_tutorial` but does so without using any streams.
:return: a :class:`.STRIPStreamProblem`
"""
num_blocks = 3
blocks = ['block%i'%i for i in range(num_blocks)]
num_poses = num_blocks+1
initial_config = 0 # the initial robot configuration is 0
initial_poses = {block: i for i, block in enumerate(blocks)} # the initial pose for block i is i
goal_poses = {block: i+1 for i, block in enumerate(blocks)} # the goal pose for block i is i+1
####################
# Data types
CONF, BLOCK, POSE = Type(), Type(), Type()
# Fluent predicates
AtConf = Pred(CONF)
AtPose = Pred(BLOCK, POSE)
HandEmpty = Pred()
Holding = Pred(BLOCK)
# Derived predicates
Safe = Pred(BLOCK, BLOCK, POSE)
# Static predicates
LegalKin = Pred(POSE, CONF)
CollisionFree = Pred(BLOCK, POSE, BLOCK, POSE)
# Free parameters
B1, B2 = Param(BLOCK), Param(BLOCK)
P1, P2 = Param(POSE), Param(POSE)
Q1, Q2 = Param(CONF), Param(CONF)
rename_easy(locals()) # Trick to make debugging easier
####################
actions = [
Action(name='pick', parameters=[B1, P1, Q1],
condition=And(AtPose(B1, P1), HandEmpty(), AtConf(Q1), LegalKin(P1, Q1)),
effect=And(Holding(B1), Not(AtPose(B1, P1)), Not(HandEmpty()))),
Action(name='place', parameters=[B1, P1, Q1],
condition=And(Holding(B1), AtConf(Q1), LegalKin(P1, Q1),
ForAll([B2], Or(Equal(B1, B2), Safe(B2, B1, P1)))), # TODO - convert to finite blocks case?
effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)))),
Action(name='move', parameters=[Q1, Q2],
condition=AtConf(Q1),
effect=And(AtConf(Q2), Not(AtConf(Q1)))),
]
axioms = [
Axiom(effect=Safe(B2, B1, P1),
condition=Exists([P2], And(AtPose(B2, P2), CollisionFree(B1, P1, B2, P2)))), # Infers B2 is at a safe pose wrt B1 at P1
]
####################
cond_streams = []
constants = []
initial_atoms = [
AtConf(initial_config),
HandEmpty()
] + [
AtPose(block, pose) for block, pose in initial_poses.iteritems()
] + [
LegalKin(i, i) for i in range(num_poses)
] + [
CollisionFree(b1, p1, b2, p2) for b1, p1, b2, p2 in product(blocks, range(num_poses), blocks, range(num_poses)) if p1 != p2 and b1 != b2
]
goal_literals = [AtPose(block, pose) for block, pose in goal_poses.iteritems()]
problem = STRIPStreamProblem(initial_atoms, goal_literals, actions + axioms, cond_streams, constants)
return problem
return [
IsMoveUpdate(loc1, prior, loc2, post),
Initialize(MoveCost(*self.inputs[:2]), cost)
] # TODO - make this a test stream
##################################################
# NOTE - the location here is like a control parameter
actions = [
Action(
name='transport',
parameters=[O, L, L2, B, B2], # NOTE - Leslie and Tomas call this Move
condition=And(BAt(O, B), At(O, L), IsMoveUpdate(L, B, L2, B2)),
effect=And(
BAt(O, B2),
At(O, L2),
Not(At(O, L)),
Not(BAt(O, B)), #)),
Cost(MoveCost(L, B)))),
#Action(name='transport', parameters=[O, B, L, B2], # NOTE - I could include belief preconditions for safety or effectiveness
# condition=And(BAt(O, B), BAtAbove(L, B2, ), IsMoveUpdate(B, L, B2)),
# effect=And(BAt(O, B2), Not(BAt(O, B)))), # NOTE - Leslie and Tomas call this Move
Action(
name='find',
parameters=[O, L, B, B2],
condition=And(BAt(O, B), At(O, L), IsLookUpdate(B, L, B2)),
effect=And(
BAt(O, B2),
Not(BAt(O, B)), #)),
InspectStateCost = Function('inspect_state_cost', [OBJ, STATE])
O, L1, L2, S = Param(OBJ), Param(LOC), Param(LOC), Param(STATE)
rename_easy(locals())
#UNKNOWN_LOC = 'unknown'
# NOTE - I could validate safe by inspecting all objects or just the goal location
# TODO - could do costs by either specifying them upfront or using STRIPStream
actions = [
Action(name='find', parameters=[O, L1], # Policy to find the object or an inspection?
#condition=And(At(O, UNKNOWN_LOC)),
#effect=And(At(O, L1), Not(At(O, UNKNOWN_LOC)))),
condition=And(UnsureLoc(O), Not(NotAtLoc(O, L1))),
effect=And(At(O, L1), Not(Clear(L1)), Not(UnsureLoc(O)), Cost(FindCost(O, L1)))), # TODO - can even adjust the cost of these to bias search towards more likely
Action(name='inspect_loc', parameters=[O, L1], # NOTE - O is not needed except for the execution
condition=And(UnsureClear(L1)),
effect=And(Clear(L1), Not(UnsureClear(L1)), Cost(InspectLocCost(L1)))),
Action(name='inspect_state', parameters=[O, L1, S],
condition=And(UnsureState(O), At(O, L1)), # Probably should know where it is before you worry about its state
#condition=And(UnsureState(O), Not(UnsureLoc(O))), # Probably should know where it is before you worry about its state
effect=And(HasState(O, S), Not(UnsureState(O)), Cost(InspectStateCost(O, S)))), # TODO - should I factor loc in the cost?
Action(name='transport', parameters=[O, L1, L2], # NOTE - Leslie and Tomas call this Move
#condition=And(At(O, L1)),
condition=And(At(O, L1), Clear(L2)),
def create_problem():
"""
Creates the 1D task and motion planning STRIPStream problem.
:return: a :class:`.STRIPStreamProblem`
"""
blocks = ['block%i' % i for i in range(3)]
num_poses = pow(10, 10)
initial_config = 0 # the initial robot configuration is 0
initial_poses = {block: i for i, block in enumerate(
blocks)} # the initial pose for block i is i
# the goal pose for block i is i+1
goal_poses = {block: i + 1 for i, block in enumerate(blocks)}
####################
# Data types
CONF, BLOCK, POSE = Type(), Type(), Type()
# Fluent predicates
AtConf = Pred(CONF)
AtPose = Pred(BLOCK, POSE)
HandEmpty = Pred()
Holding = Pred(BLOCK)
# Derived predicates
Safe = Pred(BLOCK, BLOCK, POSE)
# Static predicates
LegalKin = Pred(POSE, CONF)
CollisionFree = Pred(BLOCK, POSE, BLOCK, POSE)
# Free parameters
B1, B2 = Param(BLOCK), Param(BLOCK)
P1, P2 = Param(POSE), Param(POSE)
Q1, Q2 = Param(CONF), Param(CONF)
rename_easy(locals()) # Trick to make debugging easier
####################
actions = [
Action(name='pick', parameters=[B1, P1, Q1],
condition=And(AtPose(B1, P1), HandEmpty(),
AtConf(Q1), LegalKin(P1, Q1)),
effect=And(Holding(B1), Not(AtPose(B1, P1)), Not(HandEmpty()))),
Action(name='place', parameters=[B1, P1, Q1],
condition=And(Holding(B1), AtConf(Q1), LegalKin(P1, Q1),
ForAll([B2], Or(Equal(B1, B2), Safe(B2, B1, P1)))), # TODO - convert to finite blocks case?
effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)))),
Action(name='move', parameters=[Q1, Q2],
condition=AtConf(Q1),
effect=And(AtConf(Q2), Not(AtConf(Q1)))),
]
axioms = [
Axiom(effect=Safe(B2, B1, P1),
condition=Exists([P2], And(AtPose(B2, P2), CollisionFree(B1, P1, B2, P2)))), # Infers B2 is at a safe pose wrt B1 at P1
]
####################
# Conditional stream declarations
cond_streams = [
GeneratorStream(inputs=[], outputs=[P1], conditions=[], effects=[],
generator=lambda: ((p,) for p in xrange(num_poses))), # Enumerating all the poses
GeneratorStream(inputs=[P1], outputs=[Q1], conditions=[], effects=[LegalKin(P1, Q1)],
generator=lambda p: [(p,)]), # Inverse kinematics
TestStream(inputs=[B1, P1, B2, P2], conditions=[], effects=[CollisionFree(B1, P1, B2, P2)],
test=lambda b1, p1, b2, p2: p1 != p2, eager=True), # Collision checking
]
####################
constants = [
CONF(initial_config) # Any additional objects
]
initial_atoms = [
AtConf(initial_config),
HandEmpty()
] + [
AtPose(block, pose) for block, pose in initial_poses.iteritems()
]
goal_literals = [AtPose(block, pose)
for block, pose in goal_poses.iteritems()]
problem = STRIPStreamProblem(
initial_atoms, goal_literals, actions + axioms, cond_streams, constants)
return problem
def create_problem(p_init=0,
v_init=0,
a_init=0,
dt=.5,
max_a=10,
min_a=-10,
p_goal=10):
"""
Creates a 1D car STRIPStream problem.
https://github.com/KCL-Planning/SMTPlan/blob/master/benchmarks/car_nodrag/car_domain_nodrag.pddl
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
STATE, ACCEL, TIME = Type(), Type(), Type()
# Fluent predicates
AtState = Pred(STATE)
AtAccel = Pred(ACCEL)
NewTime = Pred()
# Fluent predicates
Running = Pred()
Stopped = Pred()
EngineBlown = Pred()
TransmissionFine = Pred()
GoalReached = Pred()
# Static predicates
Delta1 = Pred(ACCEL, ACCEL) # A2 - A1 = 1
Dynamics = Pred(STATE, ACCEL, STATE)
Contained = Pred(STATE)
# Free parameters
A1, A2 = Param(ACCEL), Param(ACCEL)
S1 = Param(STATE)
S2 = Param(STATE)
rename_easy(locals()) # Trick to make debugging easier
####################
actions = [
Action(name='accelerate',
parameters=[A1, A2],
condition=And(Running(), NewTime(), AtAccel(A1), Delta1(A1,
A2)),
effect=And(AtAccel(A2), Not(NewTime()), Not(AtAccel(A1)))),
Action(name='decelerate',
parameters=[A1, A2],
condition=And(Running(), NewTime(), AtAccel(A1), Delta1(A2,
A1)),
effect=And(AtAccel(A2), Not(NewTime()), Not(AtAccel(A1)))),
Action(name='simulate',
parameters=[S1, A1, S2],
condition=And(AtState(S1), AtAccel(A1), Dynamics(S1, A1, S2)),
effect=And(NewTime(), AtState(S2), Not(AtState(S1)))),
]
axioms = [
Axiom(effect=GoalReached(),
condition=Exists([S1], And(AtState(S1), Contained(S1)))),
]
####################
# Conditional stream declarations
cond_streams = [
FunctionStream(inputs=[S1, A1],
outputs=[S2],
conditions=[],
effects=[Dynamics(S1, A1, S2)],
function=lambda (p1, v1), a1:
(p1 + v1 * dt + .5 * a1 * dt**2, v1 + a1 * dt)),
GeneratorStream(inputs=[A1],
outputs=[A2],
conditions=[],
effects=[Delta1(A1, A2)],
generator=lambda a1: [a1 + 1]
if a1 + 1 <= max_a else []),
GeneratorStream(inputs=[A2],
outputs=[A1],
conditions=[],
effects=[Delta1(A2, A1)],
generator=lambda a2: [a2 + 1]
if a2 - 1 > -min_a else []),
TestStream(inputs=[S1],
conditions=[],
effects=[Contained(S1)],
test=lambda (p1, v1): p1 > p_goal,
eager=True),
]
####################
constants = []
initial_atoms = [
AtState((p_init, v_init)),
AtAccel(a_init),
NewTime(),
Running(),
]
goal_literals = [
GoalReached()
#AtAccel(0),
]
problem = STRIPStreamProblem(initial_atoms, goal_literals,
actions + axioms, cond_streams, constants)
return problem
def create_problem(n=50):
"""
Creates the 1D task and motion planning STRIPStream problem.
:return: a :class:`.STRIPStreamProblem`
"""
blocks = ['block%i' % i for i in xrange(n)]
num_poses = pow(10, 10)
initial_config = 0 # the initial robot configuration is 0
initial_poses = {block: i
for i, block in enumerate(blocks)
} # the initial pose for block i is i
#goal_poses = {block: i+1 for i, block in enumerate(blocks)} # the goal pose for block i is i+1
goal_poses = {blocks[0]: 1} # the goal pose for block i is i+1
#goal_poses = {blocks[0]: 100} # the goal pose for block i is i+1
####################
# Data types
CONF, BLOCK, POSE = Type(), Type(), Type()
# Fluent predicates
AtConf = Pred(CONF)
AtPose = Pred(BLOCK, POSE)
IsPose = Pred(BLOCK, POSE)
HandEmpty = Pred()
Holding = Pred(BLOCK)
Moved = Pred() # Prevents double movements
# Derived predicates
Safe = Pred(BLOCK, POSE)
#Unsafe = Pred(BLOCK, BLOCK, POSE)
Unsafe = Pred(BLOCK, POSE)
#Unsafe = Pred(POSE)
# Static predicates
Kin = Pred(POSE, CONF)
CFree = Pred(POSE, POSE)
Collision = Pred(POSE, POSE)
# Free parameters
B1, B2 = Param(BLOCK), Param(BLOCK)
P1, P2 = Param(POSE), Param(POSE)
Q1, Q2 = Param(CONF), Param(CONF)
rename_easy(locals()) # Trick to make debugging easier
####################
# TODO: drp_pddl_adl/domains/tmp.py has conditional effects When(Colliding(pose, trajectory), Not(Safe(obj, trajectory))))
# TODO: maybe this would be okay if the effects really are sparse (i.e. not many collide)
# http://www.fast-downward.org/TranslatorOutputFormat
# FastDownward will always make an axiom for the quantified expressions
# I don't really understand why FastDownward does this... It doesn't seem to help
# It creates n "large" axioms that have n-1 conditions (removing the Equal)
# universal conditions: Universal conditions in preconditions, effect conditions and the goal are internally compiled into axioms by the planner.
# Therefore, heuristics that do not support axioms (see previous point) do not support universal conditions either.
# http://www.fast-downward.org/PddlSupport
# TODO: the compilation process actually seems to still make positive axioms for things.
# The default value is unsafe and it creates positive axioms...
# A heuristic cost of 4 is because it does actually move something out the way
# drp_pddl/domains/tmp_separate.py:class CollisionAxiom(Operator, Refinable, Axiom):
# TODO: maybe I didn't actually try negative axioms like I thought?
# See also 8/24/16 and 8/26/16 notes
# Maybe the translator changed sometime making it actually invert these kinds of axioms
# TODO: maybe this would be better if I did a non-boolean version that declared success if at any pose other than this one
# It looks like temporal fast downward inverts axioms as well
actions = [
Action(
name='pick',
parameters=[B1, P1, Q1],
condition=And(AtPose(B1, P1), HandEmpty(), IsPose(B1, P1),
Kin(P1, Q1)), # AtConf(Q1),
effect=And(Holding(B1), Not(AtPose(B1, P1)), Not(HandEmpty()),
Not(Moved()))),
Action(
name='place',
parameters=[B1, P1, Q1],
condition=And(
Holding(B1),
IsPose(B1, P1),
Kin(P1, Q1), # AtConf(Q1),
#*[Safe(b, P1) for b in blocks]),
*[Not(Unsafe(b, P1)) for b in blocks]),
#*[Not(Unsafe(b, B1, P1)) for b in blocks]),
#*[Or(Equal(b, B1), Not(Unsafe(b, B1, P1))) for b in blocks]),
#ForAll([B2], Or(Equal(B1, B2), Not(Unsafe(B2, P1))))),
#ForAll([B2], Or(Equal(B1, B2), Safe(B2, P1)))),
#ForAll([B2], Not(Unsafe(B2, B1, P1)))),
effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)),
Not(Moved()))),
# Action(name='place', parameters=[B1, P1, Q1],
# condition=And(Holding(B1), AtConf(Q1), IsPose(B1, P1), Kin(P1, Q1),
# #ForAll([B2], Or(Equal(B1, B2),
# # Exists([P2], And(AtPose(B2, P2), CFree(P1, P2)))))),
# ForAll([B2], Or(Equal(B1, B2), # I think this compiles to the forward axioms that achieve things...
# Exists([P2], And(AtPose(B2, P2), IsPose(B2, P2), Not(Collision(P1, P2))))))),
# #ForAll([B2], Or(Equal(B1, B2),
# # Not(Exists([P2], And(AtPose(B2, P2), Not(CFree(P1, P2)))))))),
# #ForAll([B2], Or(Equal(B1, B2), # Generates a ton of axioms...
# # Not(Exists([P2], And(AtPose(B2, P2), IsPose(B2, P2), Collision(P1, P2))))))),
# effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)), Not(Moved()))),
#Action(name='place', parameters=[B1, P1, Q1],
# condition=And(Holding(B1), AtConf(Q1), IsPose(B1, P1), Kin(P1, Q1), Not(Unsafe(P1))),
# effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)), Not(Moved()))),
#Action(name='move', parameters=[Q1, Q2],
# condition=And(AtConf(Q1), Not(Moved())),
# effect=And(AtConf(Q2), Moved(), Not(AtConf(Q1)))),
# TODO: a lot of the slowdown is because of the large number of move axioms
# Inferred Safe
#Translator operators: 1843
#Translator axioms: 3281
#Search Time: 10.98
# Explicit Safe
#Translator operators: 1843
#Translator axioms: 3281
#Search Time: 9.926
]
# TODO: translate_strips_axiom in translate.py
# TODO: maybe this is bad because of shared poses...
# 15*15*15*15 = 50625
# Takeaways: using the implicit collision is good because it results in fewer facts
# The negated axiom does better than the normal axiom by a little bit for some reason...
axioms = [
# For some reason, the unsafe version of this is much better than the safe version in terms of making axioms?
# Even with one collision recorded, it makes a ton of axioms
#Axiom(effect=Safe(B2, P1),
# condition=Or(Holding(B2), Exists([P2], And(AtPose(B2, P2), IsPose(B2, P2), Not(Collision(P1, P2)))))),
#Axiom(effect=Unsafe(B2, B1, P1),
# condition=And(Not(Equal(B1, B2)),
# # Exists([P2], And(AtPose(B2, P2), Not(CFree(P1, P2)))))),
# Exists([P2], And(AtPose(B2, P2), Collision(P1, P2))))),
#Axiom(effect=Unsafe(B2, B1, P1),
# condition=Exists([P2], And(AtPose(B2, P2), Not(CFree(P1, P2))))),
# TODO: I think the inverting is implicitly doing the same thing I do where I don't bother making an axiom if always true
Axiom(effect=Unsafe(B2, P1),
condition=Exists([P2],
And(AtPose(B2, P2), IsPose(B2, P2),
Collision(P1,
P2)))), # Don't even need IsPose?
# This is the best config. I think it is able to work well because it can prune the number of instances when inverting
# It starts to take up a little time when there are many possible placements for things though
# TODO: the difference is that it first instantiates axioms and then inverts!
#Axiom(effect=Unsafe(B2, P1),
# condition=Exists([P2], And(AtPose(B2, P2), IsPose(B2, P2), Not(CFree(P1, P2)))))
# This doesn't result in too many axioms but takes a while to instantiate...
#Axiom(effect=Unsafe(P1), # Need to include the not equal thing
# condition=Exists([B2, P2], And(AtPose(B2, P2), IsPose(B2, P2), Collision(P1, P2)))),
# TODO: Can turn off options.filter_unreachable_facts
]
####################
# Conditional stream declarations
cond_streams = [
#GeneratorStream(inputs=[], outputs=[P1], conditions=[], effects=[],
# generator=lambda: ((p,) for p in xrange(n, num_poses))),
GeneratorStream(
inputs=[B1],
outputs=[P1],
conditions=[],
effects=[IsPose(B1, P1)],
#generator=lambda b: ((p,) for p in xrange(n, num_poses))),
generator=lambda b: iter([(n + blocks.index(b), )])
), # Unique placements
GeneratorStream(inputs=[P1],
outputs=[Q1],
conditions=[],
effects=[Kin(P1, Q1)],
generator=lambda p: [(p, )]), # Inverse kinematics
#TestStream(inputs=[P1, P2], conditions=[], effects=[CFree(P1, P2)],
# test=lambda p1, p2: p1 != p2, eager=True),
# #test = lambda p1, p2: True, eager = True),
TestStream(inputs=[P1, P2],
conditions=[],
effects=[Collision(P1, P2)],
test=lambda p1, p2: p1 == p2,
eager=False,
sign=False),
]
####################
constants = [
CONF(initial_config) # Any additional objects
]
initial_atoms = [
AtConf(initial_config),
HandEmpty(),
] + [AtPose(block, pose) for block, pose in initial_poses.items()] + [
IsPose(block, pose)
for block, pose in (initial_poses.items() + goal_poses.items())
]
goal_literals = [
AtPose(block, pose) for block, pose in goal_poses.iteritems()
]
problem = STRIPStreamProblem(initial_atoms, goal_literals,
actions + axioms, cond_streams, constants)
return problem
OBJ, LOC, STATE = Type(), Type(), Type()
At = Predicate(OBJ, LOC)
HasState = Predicate(OBJ, STATE)
Clear = Predicate(LOC)
IsDryer = Predicate(LOC)
IsPainter = Predicate(LOC)
IsWasher = Predicate(LOC)
O, L1, L2, S = Param(OBJ), Param(LOC), Param(LOC), Param(STATE)
actions = [
Action(name='transport',
parameters=[O, L1, L2],
condition=And(At(O, L1), Clear(L2)),
effect=And(At(O, L2), Clear(L1), Not(At(O, L1)), Not(
Clear(L2)))), # NOTE - Leslie and Tomas call this Move
Action(name='wash',
parameters=[O, L1, S],
condition=And(At(O, L1), HasState(O, S), IsWasher(L1)),
effect=And(HasState(O, clean), Not(HasState(O, S)))),
Action(name='paint',
parameters=[O, L1],
condition=And(At(O, L1), HasState(O, clean), IsPainter(L1)),
effect=And(HasState(O, wet), Not(HasState(O, clean)))),
Action(name='dry',
parameters=[O, L1],
condition=And(At(O, L1), HasState(O, wet), IsDryer(L1)),
effect=And(HasState(O, dry), Not(HasState(O, wet)))),
]
def compile_problem(tamp_problem):
"""
Constructs a STRIPStream problem for the continuous TMP problem.
:param tamp_problem: a :class:`.TMPProblem`
:return: a :class:`.STRIPStreamProblem`
"""
B1, B2 = Param(BLOCK), Param(BLOCK)
P1, P2 = Param(POSE), Param(POSE)
Q1, Q2 = Param(CONF), Param(CONF)
R = Param(REGION)
actions = [
Action(name='pick',
parameters=[B1, P1, Q1],
condition=And(AtPose(B1, P1), HandEmpty(), AtConf(Q1),
LegalKin(P1, Q1)),
effect=And(Holding(B1), Not(AtPose(B1, P1)), Not(HandEmpty()))),
Action(name='place',
parameters=[B1, P1, Q1],
condition=And(Holding(B1), AtConf(Q1), LegalKin(P1, Q1),
ForAll([B2], Or(Equal(B1, B2), Safe(B2, B1,
P1)))),
effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)))),
Action(name='move',
parameters=[Q1, Q2],
condition=AtConf(Q1),
effect=And(AtConf(Q2), Not(AtConf(Q1)))),
Action(name='clean',
parameters=[B1, R],
condition=And(InRegion(B1, R), IsSink(R)),
effect=And(Cleaned(B1))),
Action(name='cook',
parameters=[B1, R],
condition=And(InRegion(B1, R), IsStove(R)),
effect=And(Cooked(B1))),
]
axioms = [
Axiom(effect=InRegion(B1, R),
condition=Exists([P1], And(AtPose(B1, P1), Contained(B1, P1,
R)))),
Axiom(effect=Safe(B2, B1, P1),
condition=Exists([P2],
And(AtPose(B2, P2),
CollisionFree(B1, P1, B2, P2)))),
]
cond_streams = [
EasyGenStream(inputs=[R, B1],
outputs=[P1],
conditions=[CanPlace(B1, R)],
effects=[Contained(B1, P1, R)],
generator=lambda r, b:
(sample_region_pose(r, b) for _ in irange(0, INF))),
EasyGenStream(inputs=[P1],
outputs=[Q1],
conditions=[],
effects=[LegalKin(P1, Q1)],
generator=lambda p: iter([inverse_kinematics(p)])),
EasyTestStream(inputs=[R, B1, P1],
conditions=[],
effects=[Contained(B1, P1, R)],
test=in_region,
eager=EAGER_TESTS,
plannable=False),
EasyTestStream(inputs=[B1, P1, B2, P2],
conditions=[],
effects=[CollisionFree(B1, P1, B2, P2)],
test=lambda *args: not are_colliding(*args),
eager=EAGER_TESTS),
]
constants = [
REGION(tamp_problem.env_region),
]
initial_atoms = [
AtConf(tamp_problem.initial_config),
] + [
AtPose(block, pose)
for block, pose in tamp_problem.initial_poses.iteritems()
] + [
CanPlace(block, tamp_problem.env_region)
for block in tamp_problem.initial_poses
]
if tamp_problem.initial_holding is None:
initial_atoms.append(HandEmpty())
else:
initial_atoms.append(Holding(tamp_problem.initial_holding))
goal_literals = []
if tamp_problem.goal_config is not None:
goal_literals.append(AtConf(tamp_problem.goal_config))
if tamp_problem.goal_holding is False:
goal_literals.append(HandEmpty())
elif tamp_problem.goal_holding is not None:
goal_literals.append(Holding(tamp_problem.goal_holding))
for block, goal in tamp_problem.goal_poses:
goal_literals.append(AtPose(block, goal))
for block, goal in tamp_problem.goal_regions:
initial_atoms.append(CanPlace(block, goal))
goal_literals.append(InRegion(block, goal))
return STRIPStreamProblem(initial_atoms, goal_literals, actions + axioms,
cond_streams, constants)
def compile_problem(tamp_problem):
O = Param(OBJECT)
O1, O2 = Param(OBJECT), Param(OBJECT)
L = Param(LOCATION)
L_s, L_g = Param(LOCATION), Param(LOCATION) # generic location
Stove_l_s, Stove_l_g = Param(STOVE_L_S), Param(
STOVE_L_G) # locations for stove and sink
Sink_l_s, Sink_l_g = Param(SINK_L_S), Param(SINK_L_G)
actions = [
Action(name='wash',
parameters=[O],
condition=And(InSink(O)),
effect=And(Clean(O))),
Action(name='cook',
parameters=[O],
condition=And(InStove(O), Clean(O)),
effect=And(Cooked(O))),
Action(name='pickplace',
parameters=[O, L_s, L_g],
condition=And(EmptySweptVolume(O, L_s, L_g), AtPose(O, L_s)),
effect=And(AtPose(O, L_g),
Not(AtPose(O, L_s)))) # You should delete!
]
axioms = [
# For all objects in the world, either object is O1 or if not, then it is not in the region
Axiom(effect=EmptySweptVolume(O,L_s,L_g),condition=ForAll([O2],\
Or(Equal(O,O2),\
Exists([L],(And(AtPose(O2,L),OutsideRegion(O,O2,L,L_s,L_g))))))),
Axiom(effect=InStove(O),condition=Exists([L,L_s,L_g],And(AtPose(O,L), Contained(O,L,L_s,L_g), IsStove(L_s,L_g)))),
Axiom(effect=InSink(O),condition=Exists([L,L_s,L_g],And(AtPose(O,L), Contained(O,L,L_s,L_g), IsSink(L_s,L_g)))),
]
cond_streams = [
EasyGenStream(inputs=[O,L_s,L_g], outputs=[L], conditions=[IsSmaller(L_s,L_g)], effects=[Contained(O,L,L_s,L_g)],\
generator=lambda b, ls, lg: (sample_region_pose(b, ls, lg ) for _ in irange(0, INF))),
EasyTestStream(inputs=[L_s,L_g],conditions=[],effects=[IsSmaller(L_s,L_g)],test=is_smaller,eager=EAGER_TESTS),
EasyTestStream(inputs=[L_s,L_g,O,L],conditions=[IsSink(L_s,L_g)],effects=[Contained(O,L,L_s,L_g)],test=in_region,eager=EAGER_TESTS),
EasyTestStream(inputs=[L_s,L_g,O,L],conditions=[IsStove(L_s,L_g)],effects=[Contained(O,L,L_s,L_g)],test=in_region,eager=EAGER_TESTS),
EasyTestStream(inputs=[O,O2,L,L_s,L_g],conditions=[],effects=[OutsideRegion(O,O2,L,L_s,L_g)],test=not_in_region,eager=EAGER_TESTS),
# OutsideRegion tests if the block at L is outside of the region (Ls,Lg)
]
####################
# instantiate the environment region?
constants = [
STOVE_L_S(tamp_problem.stove_region_s),
STOVE_L_G(tamp_problem.stove_region_g),
SINK_L_S(tamp_problem.sink_region_s),
SINK_L_G(tamp_problem.sink_region_g),
]
# define initial state using initial poses of objects
initial_atoms = [
AtPose(block, pose)
for block, pose in tamp_problem.initial_poses.iteritems()
] + [IsSink(tamp_problem.sink_region_s, tamp_problem.sink_region_g)] + [
IsStove(tamp_problem.stove_region_s, tamp_problem.stove_region_g)
]
# static predicate but on steroid
# define goal state as target object to be cooked - can you infer that target object is on Stove
goal_literals = []
# goal_literals.append( AtPose(tamp_problem.blue_obj,1) ) #NOTE: This works; so planner knows how to clear the area
# goal_literals.append( AtPose(tamp_problem.target_obj,3.0) ) #NOTE: But doing this does not work
goal_literals.append(Cooked(tamp_problem.target_obj))
return STRIPStreamProblem(initial_atoms, goal_literals, actions + axioms,
cond_streams, constants), static_pred_names
def create_problem(n=50):
"""
Creates the 1D task and motion planning STRIPStream problem.
:return: a :class:`.STRIPStreamProblem`
"""
blocks = ['block%i' % i for i in xrange(n)]
num_poses = pow(10, 10)
initial_config = 0 # the initial robot configuration is 0
initial_poses = {block: i
for i, block in enumerate(blocks)
} # the initial pose for block i is i
goal_poses = {blocks[1]: 2} # the goal pose for block i is i+1
####################
# TODO: the last version of this would be to make a separate pose type per object (I think I did do this)
CONF = Type()
HandEmpty = Pred()
AtConf = Pred(CONF)
Q1, Q2 = Param(CONF), Param(CONF)
#POSE = Type()
#Kin = Pred(POSE, CONF)
#Collision = Pred(POSE, POSE)
#P1, P2 = Param(POSE), Param(POSE)
#rename_easy(locals()) # Trick to make debugging easier
actions = [
Action(name='move',
parameters=[Q1, Q2],
condition=AtConf(Q1),
effect=And(AtConf(Q2), Not(AtConf(Q1)))),
]
axioms = []
cond_streams = [
#GeneratorStream(inputs=[P1], outputs=[Q1], conditions=[], effects=[Kin(P1, Q1)],
# generator=lambda p: [(p,)]), # Inverse kinematics
#TestStream(inputs=[P1, P2], conditions=[], effects=[Collision(P1, P2)],
# test=lambda p1, p2: p1 == p2, eager=True),
]
initial_atoms = [
AtConf(initial_config),
HandEmpty(),
]
goal_literals = []
####################
# TODO: I think thinking invariants gets harder with many predicates. Can cap this time I believe though
#153 initial candidates
#Finding invariants: [2.250s CPU, 2.263s wall - clock]
for b in blocks:
# TODO: can toggle using individual pose types
POSE = Type()
Kin = Pred(POSE, CONF)
P1 = Param(POSE)
AtPose = Pred(POSE)
IsPose = Pred(POSE)
Holding = Pred()
#Unsafe = Pred(BLOCK, POSE)
initial_atoms += [
AtPose(initial_poses[b]),
IsPose(initial_poses[b]),
]
if b in goal_poses:
goal_literals += [AtPose(goal_poses[b])]
initial_atoms += [IsPose(goal_poses[b])]
axioms += [
# TODO: to do this, need to make b a parameter and set it using inequality
#Axiom(effect=Unsafe(b, P1),
# condition=Exists([P2], And(AtPose(b, P2), IsPose(b, P2), Collision(P1, P2)))),
]
actions += [
Action(name='pick-{}'.format(b),
parameters=[P1, Q1],
condition=And(AtPose(P1), HandEmpty(), AtConf(Q1),
IsPose(P1), Kin(P1, Q1)),
effect=And(Holding(), Not(AtPose(P1)), Not(HandEmpty()))),
Action(
name='place-{}'.format(b),
parameters=[P1, Q1],
condition=And(Holding(), AtConf(Q1), IsPose(P1), Kin(P1, Q1)),
#*[Safe(b2, P1) for b2 in blocks if b2 != b]),
#*[Not(Unsafe(b2, P1)) for b2 in blocks if b2 != b]),
effect=And(AtPose(P1), HandEmpty(), Not(Holding()))),
]
cond_streams += [
GeneratorStream(inputs=[],
outputs=[P1],
conditions=[],
effects=[IsPose(P1)],
generator=lambda:
((p, ) for p in xrange(n, num_poses))),
GeneratorStream(inputs=[P1],
outputs=[Q1],
conditions=[],
effects=[Kin(P1, Q1)],
generator=lambda p: [(p, )]), # Inverse kinematics
]
problem = STRIPStreamProblem(initial_atoms, goal_literals,
actions + axioms, cond_streams, [])
return problem
def create_problem(initRobotPos = (0.5, 0.5),
initRobotVar = 0.01,
maxMoveDist = 5.0,
beaconPos = (1, 1),
homePos = (0, 0),
goalPosEps = 0.1,
goalVar = 0.1,
odoErrorRate = 0.1,
obsVarPerDistFromSensor = 10.0,
minObsVar = 0.001,
domainSize = 20,
verboseFns = False):
"""
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
POS = Type() # 2D position
VAR = Type() # 2D variance
BEACON = Type() # 2D position
# Fluent predicates
RobotPos = Pred(POS)
RobotVar = Pred(VAR)
# Derived predicates
KnowYouAreHome = Pred()
# Static predicates
Odometry = Pred(POS, VAR, POS, VAR)
Sensor = Pred(POS, VAR, BEACON, VAR)
LegalPosVar = Pred(POS, VAR)
NearbyPos = Pred(POS, POS)
NearGoalPos = Pred(POS)
NearGoalVar = Pred(VAR)
# Free parameters
RPOS1, RPOS2 = Param(POS), Param(POS)
RVAR1, RVAR2 = Param(VAR), Param(VAR)
BPOS = Param(BEACON)
rename_easy(locals())
# Helper functions
def distance(p1, p2):
return math.sqrt(sum([(a - b)**2 for (a,b) in zip(p1, p2)]))
def odoVarFun(rp1, rv, rp2):
d = distance(rp1, rp2)
odoVar = (d * odoErrorRate)**2
result = rv + odoVar
if verboseFns: print 'ovf:', rv, d, result
return [result]
def sensorVarFun(rp, rv, bp):
d = distance(rp, bp)
obsVar = max(d / obsVarPerDistFromSensor, minObsVar)
#result = round(1.0 / ((1.0 / rv) + (1.0 / obsVar)), 5) # Causes zero variance which is bad
result = 1.0 / ((1.0 / rv) + (1.0 / obsVar))
if verboseFns: print 'svf:', rv, d, result
return [result]
def randPos():
while True:
result = (random.random() * domainSize, random.random() * domainSize)
print 'rp:', result
yield [result]
def legalTest(rp):
(x, y) = rp
result = (0 <= x <= domainSize) and (0 <= y <= domainSize)
if not result: print 'not legal:', rp
return result
# TODO - combine variance and positions
actions = [
Action(name='Move',
parameters=[RPOS1, RVAR1, RPOS2, RVAR2],
condition = And(RobotPos(RPOS1),
RobotVar(RVAR1),
Odometry(RPOS1, RVAR1, RPOS2, RVAR2)),
effect = And(RobotPos(RPOS2),
RobotVar(RVAR2),
Not(RobotPos(RPOS1)),
Not(RobotVar(RVAR1)))),
Action(name='Look',
parameters=[RPOS1, RVAR1, BPOS, RVAR2],
condition = And(RobotPos(RPOS1),
RobotVar(RVAR1),
Sensor(RPOS1, RVAR1, BPOS, RVAR2)),
effect = And(RobotVar(RVAR2),
Not(RobotVar(RVAR1))))
]
axioms = [
]
# Conditional stream declarations
cond_streams = [
GeneratorStream(inputs = [],
outputs = [RPOS1],
conditions = [],
effects = [],
generator = randPos),
# TODO - the number of variances grows incredibly but we just want to consider variances possible with the move
# Each var only has one pos because moving changes
GeneratorStream(inputs = [RPOS1, RVAR1, RPOS2],
outputs = [RVAR2],
conditions = [LegalPosVar(RPOS1, RVAR1), NearbyPos(RPOS1, RPOS2)],
effects = [Odometry(RPOS1, RVAR1, RPOS2, RVAR2), LegalPosVar(RPOS2, RVAR2)],
generator = odoVarFun),
GeneratorStream(inputs = [RPOS1, RVAR1, BPOS],
outputs = [RVAR2],
conditions = [LegalPosVar(RPOS1, RVAR1)],
effects = [Sensor(RPOS1, RVAR1, BPOS, RVAR2), LegalPosVar(RPOS1, RVAR2)],
generator = sensorVarFun),
TestStream(inputs = [RPOS1, RPOS2],
conditions = [],
effects = [NearbyPos(RPOS1, RPOS2)],
test = lambda rp1, rp2: distance(rp1, rp2) < maxMoveDist,
eager = True),
TestStream(inputs = [RPOS1],
conditions = [],
effects = [NearGoalPos(RPOS1)],
test = lambda rp1: distance(rp1, homePos) < goalPosEps,
eager = True),
TestStream(inputs = [RVAR1],
conditions = [],
effects = [NearGoalVar(RVAR1)],
test = lambda a: a < goalVar,
eager = True)
# NOTE - the problem seems to be the fast that this is eager
]
####################
constants = [
BEACON(beaconPos),
#POS((.1, .1)),
#POS((3., .1)),
#POS((6., .1)),
POS(homePos),
]
initial_atoms = [
RobotPos(initRobotPos),
RobotVar(initRobotVar),
LegalPosVar(initRobotPos, initRobotVar), # TODO - I might as well keep track of pairs. Make this a legal on both
]
goal_formula = Exists([RPOS1, RVAR1],
And(RobotPos(RPOS1),
RobotVar(RVAR1),
LegalPosVar(RPOS1, RVAR1),
NearGoalPos(RPOS1),
NearGoalVar(RVAR1)))
problem = STRIPStreamProblem(initial_atoms, goal_formula, actions + axioms,
cond_streams, constants)
return problem
def compile_problem(tamp_problem):
"""
Constructs a STRIPStream problem for the countable TMP problem.
:param tamp_problem: a :class:`.TMPProblem`
:return: a :class:`.STRIPStreamProblem`
"""
B1, B2 = Param(BLOCK), Param(BLOCK)
P1, P2 = Param(POSE), Param(POSE)
Q1, Q2 = Param(CONF), Param(CONF)
actions = [
Action(name='pick',
parameters=[B1, P1, Q1],
condition=And(AtPose(B1, P1), HandEmpty(), AtConf(Q1),
LegalKin(P1, Q1)),
effect=And(Holding(B1), Not(AtPose(B1, P1)), Not(HandEmpty()))),
Action(name='place',
parameters=[B1, P1, Q1],
condition=And(Holding(B1), AtConf(Q1), LegalKin(P1, Q1),
ForAll([B2], Or(Equal(B1, B2), Safe(B2, P1)))),
effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)))),
Action(name='move',
parameters=[Q1, Q2],
condition=AtConf(Q1),
effect=And(AtConf(Q2), Not(AtConf(Q1)))),
]
axioms = [
Axiom(effect=Safe(B2, P1),
condition=Exists([P2], And(AtPose(B2, P2), CollisionFree(P1,
P2)))),
]
cond_streams = [
EasyGenStream(inputs=[],
outputs=[P1],
conditions=[],
effects=[],
generator=lambda: irange(0, NUM_POSES)),
EasyGenStream(inputs=[P1],
outputs=[Q1],
conditions=[],
effects=[LegalKin(P1, Q1)],
generator=lambda p: iter([p])),
EasyTestStream(inputs=[P1, P2],
conditions=[],
effects=[CollisionFree(P1, P2)],
test=lambda p1, p2: p1 != p2,
eager=EAGER_TESTS),
]
constants = []
initial_atoms = [
AtConf(tamp_problem.initial_config),
] + [
AtPose(block, pose)
for block, pose in tamp_problem.initial_poses.iteritems()
]
if tamp_problem.initial_holding is False:
initial_atoms.append(HandEmpty())
else:
initial_atoms.append(Holding(tamp_problem.initial_holding, BLOCK))
goal_literals = []
if tamp_problem.goal_holding is False:
goal_literals.append(HandEmpty())
elif tamp_problem.goal_holding is not None:
goal_literals.append(Holding(tamp_problem.goal_holding))
for block, goal in tamp_problem.goal_poses.iteritems():
goal_literals.append(AtPose(block, goal))
return STRIPStreamProblem(initial_atoms, goal_literals, actions + axioms,
cond_streams, constants)
def create_problem(goal, obstacles=(), distance=.25, digits=3):
"""
Creates a Probabilistic Roadmap (PRM) motion planning problem.
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
POINT = Type()
REGION = Type()
# Fluent predicates
AtPoint = Pred(POINT)
# Derived predicates
InRegion = Pred(REGION)
# Stream predicates
AreNearby = Pred(POINT, POINT)
IsEdge = Pred(POINT, POINT)
Contained = Pred(POINT, REGION)
# Functions
Distance = Func(POINT, POINT)
# Free parameters
P1, P2 = Param(POINT), Param(POINT)
R = Param(REGION)
rename_easy(locals()) # Trick to make debugging easier
####################
actions = [
#STRIPSAction(name='move', parameters=[P1, P2],
# conditions=[AtPoint(P1), IsEdge(P1, P2)],
# effects=[AtPoint(P2), Not(AtPoint(P1))], cost=1), # Fixed cost
#STRIPSAction(name='move', parameters=[P1, P2],
# conditions=[AtPoint(P1), IsEdge(P1, P2)],
# effects=[AtPoint(P2), Not(AtPoint(P1)), Cost(Distance(P1, P2))]), # Cost depends on parameters
Action(name='move',
parameters=[P1, P2],
condition=And(AtPoint(P1), IsEdge(P1, P2)),
effect=And(AtPoint(P2), Not(AtPoint(P1))),
costs=[1, Distance(P1, P2)]),
]
axioms = [
#Axiom(effect=GoalReached(), condition=Exists([P1], And(AtPos(P1), Contained(P1)))),
STRIPSAxiom(conditions=[AtPoint(P1), Contained(P1, R)],
effects=[InRegion(R)])
]
####################
# Conditional stream declarations
cond_streams = [
GeneratorStream(
inputs=[],
outputs=[P1],
conditions=[],
effects=[],
generator=lambda: ((sample(digits), ) for _ in inf_sequence())
), # NOTE - version that only generators collision-free points
GeneratorStream(inputs=[R],
outputs=[P1],
conditions=[],
effects=[Contained(P1, R)],
generator=lambda r:
((sample_box(r), ) for _ in inf_sequence())),
#TestStream(inputs=[P1, P2], conditions=[], effects=[AreNearby(P1, P2), AreNearby(P2, P1)],
# test=lambda p1, p2: get_distance(p1, p2) <= distance, eager=True),
#TestStream(inputs=[P1, P2], conditions=[AreNearby(P1, P2)], effects=[IsEdge(P1, P2), IsEdge(P2, P1)],
# test=lambda p1, p2: is_collision_free((p1, p2), obstacles), eager=True),
TestStream(
inputs=[P1, P2],
conditions=[],
effects=[IsEdge(P1, P2), IsEdge(P2, P1)],
#test=lambda p1, p2: is_collision_free((p1, p2), obstacles), eager=True),
test=lambda p1, p2:
(get_distance(p1, p2) <= distance) and is_collision_free(
(p1, p2), obstacles),
eager=True),
#TestStream(inputs=[P1, P2], conditions=[], effects=[IsEdge(P1, P2), IsEdge(P2, P1)],
# test=lambda p1, p2: get_distance(p1, p2) <= distance and is_collision_free((p1, p2), obstacles), eager=True),
#TestStream(inputs=[P1, R], conditions=[], effects=[Contained(P1, R)],
# test=lambda p, r: contains(p, r), eager=True),
CostStream(inputs=[P1, P2],
conditions=[],
effects=[Distance(P1, P2),
Distance(P2, P1)],
function=get_distance,
scale=100,
eager=True),
]
####################
constants = []
initial_atoms = [
AtPoint((0, 0)),
]
goal_literals = []
if is_region(goal):
goal_literals.append(InRegion(goal))
else:
goal_literals.append(AtPoint(goal))
problem = STRIPStreamProblem(initial_atoms, goal_literals,
actions + axioms, cond_streams, constants)
return problem
def compile_problem(oracle):
problem = oracle.problem
for obj in problem.goal_poses:
if problem.goal_poses[obj] == 'initial':
problem.goal_poses[obj] = oracle.initial_poses[obj]
elif problem.goal_poses[
obj] in oracle.initial_poses: # Goal names other object (TODO - compile with initial)
problem.goal_poses[obj] = oracle.initial_poses[
problem.goal_poses[obj]]
####################
O, P, G, Q, T = Param(OBJ), Param(POSE), Param(GRASP), Param(CONF), Param(
TRAJ)
Q1, Q2, OB, R = Param(CONF), Param(CONF), Param(OBJ), Param(REG)
#BT = Param(BASE_TRAJ)
rename_easy(locals())
actions = [
Action(
name='pick',
parameters=[O, P, G, Q, T],
condition=And(
PoseEq(O, P),
HandEmpty(),
Manip(O, P, G, Q, T),
ConfEq(Q), # NOTE - can remove ConfEq(Q)
ForAll([OB], Or(Equal(O, OB), Safe(OB, T)))),
effect=And(PoseEq(O, None), GraspEq(O, G), Not(HandEmpty()),
Not(PoseEq(O, P)))),
Action(
name='place',
parameters=[O, P, G, Q, T],
condition=And(
PoseEq(O, None),
GraspEq(O, G),
Manip(O, P, G, Q, T),
ConfEq(Q), # NOTE - can remove ConfEq(Q)
ForAll([OB], Or(Equal(O, OB), Safe(OB, T)))),
effect=And(PoseEq(O, P), HandEmpty(), Not(PoseEq(O, None)),
Not(GraspEq(O, G)))),
Action('clean',
parameters=[O, R],
condition=And(InRegion(O, R), IsSink(R)),
effect=Cleaned(O)),
Action('cook',
parameters=[O, R],
condition=And(Cleaned(O), InRegion(O, R), IsStove(R)),
effect=And(Cooked(O), Not(Cleaned(O)))),
Action(name='move',
parameters=[Q1, Q2],
condition=ConfEq(Q1),
effect=And(ConfEq(Q2), Not(ConfEq(Q1)))),
]
axioms = [
#Axiom(effect=Holding(O), condition=Exists([G], And(GraspEq(O, G), LegalGrasp(O, G)))),
STRIPSAxiom(conditions=[GraspEq(O, G), LegalGrasp(O, G)],
effects=[Holding(O)]),
Axiom(effect=InRegion(O, R),
condition=Exists([P], And(PoseEq(O, P), Contained(R, O, P)))),
#STRIPSAxiom(conditions=[PoseEq(O, P), ContainedCon(R, O, P)], effects=[InRegion(O, R)]),
Axiom(effect=Safe(O, T),
condition=Exists([P], And(PoseEq(O, P), CFree(O, P, T)))),
#STRIPSAxiom(conditions=[PoseEq(O, P), CFreeCon(O, P, T)], effects=[Safe(O, T)]),
]
# TODO - include parameters in STRIPS axiom?
####################
def sample_poses(o, num_samples=1):
while True:
if AVOID_INITIAL:
oracle.set_all_object_poses(oracle.initial_poses)
else:
oracle.set_all_object_poses({o: oracle.initial_poses[o]})
yield list(
islice(
random_region_placements(oracle,
o,
oracle.get_counters(),
region_weights=True),
num_samples))
def sample_grasps(o):
yield get_grasps(oracle, o)
def sample_region(o, r, num_samples=1):
while True:
oracle.set_all_object_poses({o: oracle.initial_poses[o]})
yield list(
islice(
random_region_placements(oracle,
o, [r],
region_weights=True),
num_samples))
def sample_motion(o, p, g, max_calls=1, max_failures=50):
oracle.set_all_object_poses(
{o: p}) # TODO - saver for the initial state as well?
if oracle.approach_collision(o, p, g):
return
for i in range(max_calls):
pap = PickAndPlace(oracle.get_geom_hash(o), p, g)
if not pap.sample(oracle,
o,
max_failures=max_failures,
sample_vector=DO_ARM_MOTION,
sample_arm=DO_ARM_MOTION,
check_base=CHECK_BASE):
break
pap.obj = o
yield [(pap.approach_config, pap)]
def collision_free(o, p, t):
if p is None or o == t.obj:
return True
holding = ObjGrasp(t.obj, t.grasp)
#holding = Holding(self.oracle.get_body_name(pap.geom_hash), pap.grasp)
if not DO_ARM_MOTION:
return not oracle.holding_collision(t.grasp_config, o, p, holding)
return not oracle.traj_holding_collision(t.approach_config, t.trajs, o,
p, holding)
cond_streams = [
EasyListGenStream(inputs=[O],
outputs=[P],
conditions=[],
effects=[LegalPose(O, P)],
generator=sample_poses),
EasyListGenStream(inputs=[O],
outputs=[G],
conditions=[],
effects=[LegalGrasp(O, G)],
generator=sample_grasps),
EasyListGenStream(inputs=[O, R],
outputs=[P],
conditions=[],
effects=[LegalPose(O, P),
Contained(R, O, P)],
generator=sample_region),
EasyListGenStream(inputs=[O, P, G],
outputs=[Q, T],
conditions=[LegalPose(O, P),
LegalGrasp(O, G)],
effects=[Manip(O, P, G, Q, T)],
generator=sample_motion),
#MultiEasyGenStream(inputs=[Q1, Q2], outputs=[BT], conditions=[],
# effects=[Motion(Q1, BT, Q2)], generator=lambda q1, q2: [[None]]),
EasyTestStream(inputs=[O, P, T],
conditions=[LegalPose(O, P)],
effects=[CFree(O, P, T)],
test=collision_free,
eager=EAGER_TESTS),
]
####################
constants = [POSE(None)]
initial_atoms = [ConfEq(oracle.initial_config)] # TODO - toggle
holding = set()
if problem.start_holding is not False:
obj, grasp = problem.start_holding
initial_atoms += [
GraspEq(obj, grasp),
PoseEq(obj, None),
LegalGrasp(obj, grasp)
]
holding.add(obj)
if not holding:
initial_atoms.append(HandEmpty())
for obj, pose in oracle.initial_poses.iteritems():
if obj not in holding:
initial_atoms += [PoseEq(obj, pose), LegalPose(obj, pose)]
initial_atoms += [IsSink(region) for region in oracle.sinks]
initial_atoms += [IsStove(region) for region in oracle.stoves]
goal_literals = []
if problem.goal_holding is not None:
if problem.goal_holding is False:
goal_literals.append(HandEmpty())
elif isinstance(problem.goal_holding, ObjGrasp):
goal_literals.append(
GraspEq(problem.goal_holding.object_name,
problem.goal_holding.grasp))
elif problem.goal_holding in oracle.get_objects():
goal_literals.append(Holding(problem.goal_holding))
else:
raise Exception()
for obj, pose in problem.goal_poses.iteritems():
goal_literals.append(PoseEq(obj, pose))
initial_atoms.append(LegalPose(obj, pose))
for obj, region in problem.goal_regions.iteritems():
goal_literals.append(InRegion(obj, region))
for obj in problem.goal_cleaned:
goal_literals.append(Cleaned(obj))
for obj in problem.goal_cooked:
goal_literals.append(Cooked(obj))
goal_formula = goal_literals
#goal_formula = And(*goal_literals)
#goal_formula = AbsCondition(goal_literals) # TODO - bug where goals must have And
return STRIPStreamProblem(initial_atoms, goal_formula, actions + axioms,
cond_streams, constants)
def create_problem(initRobotPos = (0.5, 0.5),
initRobotVar = 0.01,
maxMoveDist = 5.0,
beaconPos = (1, 1),
homePos = (0, 0),
goalPosEps = 0.1,
goalVar = 0.1,
odoErrorRate = 0.1,
obsVarPerDistFromSensor = 10.0,
minObsVar = 0.001,
domainSize = 20,
verboseFns = True):
"""
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
POS = Type() # 2D position
VAR = Type() # 2D variance
DIST = Type() # positive scalar
# Fluent predicates
RobotPos = Pred(POS)
RobotVar = Pred(VAR)
# Derived predicates
KnowYouAreHome = Pred()
# Static predicates
DistBetween = Pred(POS, POS, DIST) # Distance between two positions (function)
LessThanV = Pred(VAR, VAR) # Less than, on distances
LessThanD = Pred(DIST, DIST) # Less than, on distances
OdometryVar = Pred(VAR, VAR, DIST) # How does odometry variance increase?
SensorVar = Pred(VAR, VAR, DIST) # How does an observation decrease variance?
LegalPos = Pred(POS) # Any legal robot pos
# Free parameters
RPOS1, RPOS2, RVAR1, RVAR2 = Param(POS), Param(POS), Param(VAR), Param(VAR)
DIST1, DIST2 = Param(DIST), Param(DIST)
def odoVarFun(rv, d):
odoVar = (d * odoErrorRate)**2
result = rv + odoVar
if verboseFns: print 'ovf:', rv, d, result
return [result]
def sensorVarFun(rv, d):
obsVar = max(d / obsVarPerDistFromSensor, minObsVar)
result = 1.0 / ((1.0 / rv) + (1.0 / obsVar))
if verboseFns: print 'svf:', rv, d, result
return [result]
def randPos():
while True:
result = (random.random() * domainSize, random.random() * domainSize)
print 'rp:', result
yield [result]
def legalTest(rp):
(x, y) = rp
result = (0 <= x <= domainSize) and (0 <= y <= domainSize)
if not result: print 'not legal:', rp
return result
actions = [
Action(name='Move',
parameters=[RPOS1, RPOS2, RVAR1, RVAR2, DIST1],
condition = And(RobotPos(RPOS1),
RobotVar(RVAR1),
LegalPos(RPOS2), # Generate an intermediate pos
DistBetween(RPOS1, RPOS2, DIST1),
LessThanD(DIST1, maxMoveDist),
OdometryVar(RVAR1, RVAR2, DIST1)),
effect = And(RobotPos(RPOS2),
RobotVar(RVAR2),
Not(RobotPos(RPOS1)),
Not(RobotVar(RVAR1)))),
# Action(name='Look',
# parameters=[RPOS1, RVAR1, RVAR2, DIST1],
# condition = And(RobotPos(RPOS1),
# RobotVar(RVAR1),
# DistBetween(RPOS1, beaconPos, DIST1),
# SensorVar(RVAR1, RVAR2, DIST1)),
# effect = And(RobotVar(RVAR2),
# Not(RobotVar(RVAR1))))
]
axioms = [
Axiom(effect = KnowYouAreHome(),
condition = Exists([RPOS1, RVAR1, DIST1],
And(RobotPos(RPOS1),
RobotVar(RVAR1),
DistBetween(RPOS1, homePos, DIST1),
LessThanD(DIST1, goalPosEps),
LessThanV(RVAR1, goalVar))))
]
# Conditional stream declarations
cond_streams = [
TestStream(inputs = [RPOS1],
conditions = [],
effects = [LegalPos(RPOS1)],
test = legalTest,
eager = True),
GeneratorStream(inputs = [],
outputs = [RPOS1],
conditions = [],
effects = [LegalPos(RPOS1)],
generator = randPos),
GeneratorStream(inputs = [RPOS1, RPOS2],
outputs = [DIST1],
conditions = [],
effects = [DistBetween(RPOS1, RPOS2, DIST1)],
generator = lambda rp1, rp2: [distance(rp1, rp2)]),
GeneratorStream(inputs = [RVAR1, DIST1],
outputs = [RVAR2],
conditions = [],
effects = [OdometryVar(RVAR1, RVAR2, DIST1)],
generator = odoVarFun),
# GeneratorStream(inputs = [RVAR1, DIST1],
# outputs = [RVAR2],
# conditions = [],
# effects = [SensorVar(RVAR1, RVAR2, DIST1)],
# generator = sensorVarFun),
TestStream(inputs = [DIST1, DIST2],
conditions = [],
effects = [LessThanD(DIST1, DIST2)],
test = lt,
eager = True),
TestStream(inputs = [RVAR1, RVAR2],
conditions = [],
effects = [LessThanV(RVAR1, RVAR2)],
test = lt, eager = True)
]
####################
constants = [
]
initial_atoms = [
RobotPos(initRobotPos),
RobotVar(initRobotVar),
LegalPos(homePos),
LegalPos((.1, .1)),
LegalPos((3.0, .1)),
LegalPos((6.0, .1))
]
goal_literals = [
KnowYouAreHome()
]
problem = STRIPStreamProblem(initial_atoms, goal_literals, actions + axioms,
cond_streams, constants)
return problem
def compile_problem(estimator, task):
# Data types
CONF = Type()
SURFACE = Type() # Difference between fixed and movable objects
ITEM = Type()
POSE = Type()
CLASS = Type()
# Fluent predicates
AtConf = Pred(CONF)
HandEmpty = Pred()
Holding = Pred(ITEM)
AtPose = Pred(ITEM, POSE)
Supported = Pred(POSE, SURFACE) # Fluent
Localized = Pred(OBJECT)
Measured = Pred(OBJECT)
# Static predicates
IsKin = Pred(POSE, CONF)
IsClass = Pred(OBJECT, CLASS)
IsVisible = Pred(SURFACE, CONF)
IsSupported = Pred(POSE, SURFACE) # Static
# Functions
ScanRoom = Func(SURFACE)
#ScanTable = Func(SURFACE, TYPE)
ScanTable = Func(
SURFACE, ITEM) # TODO: could include more specific vantage point costs
Distance = Func(CONF, CONF)
# Derived
On = Pred(ITEM, SURFACE)
ComputableP = Pred(POSE)
ComputableQ = Pred(CONF)
# Free parameters
Q1, Q2 = Param(CONF), Param(CONF)
S1 = Param(SURFACE)
B1, B2 = Param(ITEM), Param(ITEM)
P1, P2 = Param(POSE), Param(POSE)
rename_easy(locals()) # Trick to make debugging easier
# TODO: could just do easier version of this that doesn't require localized to start
actions = [
Action(
name='pick',
parameters=[B1, P1, Q1], # TODO: Visibility constraint
condition=And(Localized(B1), AtPose(B1, P1), HandEmpty(),
AtConf(Q1), IsKin(P1, Q1)),
effect=And(Holding(B1), Not(AtPose(B1, P1)), Not(HandEmpty()))),
Action(name='place',
parameters=[B1, P1, Q1],
condition=And(Holding(B1), AtConf(Q1), IsKin(P1, Q1)),
effect=And(AtPose(B1, P1), HandEmpty(), Not(Holding(B1)))),
Action(name='move',
parameters=[Q1, Q2],
condition=And(AtConf(Q1), ComputableQ(Q2)),
effect=And(AtConf(Q2), Not(AtConf(Q1)), Cost(Distance(Q1,
Q2)))),
Action(name='scan_room',
parameters=[S1],
condition=Not(Localized(S1)),
effect=And(Localized(S1), Cost(ScanRoom(S1)))),
# TODO: need to set later poses to be usable or not to constrain order
Action(name='scan_table',
parameters=[S1, B1, P1, Q1],
condition=And(Localized(S1), AtConf(Q1), IsVisible(S1, Q1),
Not(Localized(B1))),
effect=And(Localized(B1), Measured(P1), Supported(P1, S1),
Cost(ScanTable(S1, B1)))),
]
axioms = [
# TODO: axiom for on? Might need a stream that generates initial fluents for On
# TODO: axiom that says that all fake values depending on a certain one now are usable
# TODO: could use stream predicates as fluents (as long as it doesn't break anything...)
Axiom(effect=On(B1, S1),
condition=Exists([P1],
And(AtPose(B1, P1),
Or(IsSupported(P1, S1), Supported(P1,
S1))))),
# TODO: compile automatically
Axiom(effect=ComputableQ(Q1),
condition=Or(Measured(Q1),
Exists([P1], And(IsKin(P1, Q1), ComputableP(P1))),
Exists([S1], And(IsVisible(S1, Q1),
Localized(S1))))),
Axiom(effect=ComputableP(P1),
condition=Or(
Measured(P1),
Exists([S1], And(IsSupported(P1, S1), Localized(S1))))),
]
#####
surface_types = estimator.surface_octomaps.keys()
item_types = estimator.object_octomaps.keys()
names_from_type = defaultdict(list)
known_poses = {}
holding = None
def add_type(cl):
name = '{}{}'.format(cl, len(names_from_type[cl]))
names_from_type[cl].append(name)
return name
# TODO: this is all very similar to the generic open world stuff
if estimator.holding is not None:
holding = add_type(estimator.holding)
for cl, octomap in estimator.surface_octomaps.items(
): # TODO: generic surface object
for pose in octomap.get_occupied():
known_poses[add_type(cl)] = pose
for cl, octomap in estimator.object_octomaps.items():
for pose in octomap.get_occupied():
known_poses[add_type(cl)] = pose
print dict(names_from_type), known_poses
# Human tells you to move block -> at least one block
# At least one block -> at least one surface
# TODO: generate fake properties about these fake values?
goal_objects, goal_surfaces = entities_from_task(task)
for cl in surface_types:
add_type(cl)
#for cl in goal_surfaces:
# for i in xrange(len(names_from_type[cl]), goal_surfaces[cl]):
# add_type(cl)
#for cl in item_types:
for cl in goal_objects:
for i in xrange(len(names_from_type[cl]), goal_objects[cl]):
add_type(cl)
#####
initial_atoms = [
AtConf(estimator.robot_conf),
Measured(CONF(estimator.robot_conf))
]
if holding is None:
initial_atoms.append(HandEmpty())
else:
initial_atoms.append(Holding(holding))
class_from_name = {
name: ty
for ty in names_from_type for name in names_from_type[ty]
}
for name, ty in class_from_name.iteritems():
ENTITY = SURFACE if ty in surface_types else ITEM
initial_atoms.append(IsClass(ENTITY(name), ty))
if name in known_poses:
initial_atoms.append(Localized(ENTITY(name)))
if ENTITY == ITEM:
pose = known_poses[name]
initial_atoms += [AtPose(name, pose), Measured(POSE(pose))]
else:
if ENTITY == ITEM:
pose = 'p_init_{}'.format(
name
) # The object should always be at this pose (we just can't do anything about it yet)
initial_atoms += [AtPose(name, pose)]
goal_literals = []
if task.holding is None:
goal_literals.append(HandEmpty())
elif task.holding is not False:
goal_literals.append(
Exists([B1], And(Holding(B1), IsClass(B1, task.holding))))
for obj, surface in task.object_surfaces:
goal_literals.append(
Exists([B1, S1],
And(On(B1, S1), IsClass(B1, obj), IsClass(S1, surface))))
goal_formula = And(*goal_literals)
####################
TOLERANCE = 0.1
def is_visible(table, conf):
x, y = conf
pose = known_poses[table]
#return (pose == x) and (y == 2)
#return (pose == x) and (y == 2)
return (pose == x) and (abs(y - 2) < TOLERANCE)
def is_kinematic(pose, conf):
x, y = conf
#return (pose == x) and (y == 1)
return (pose == x) and (abs(y - 1) < TOLERANCE)
####################
def sample_visible(table): # TODO: could generically do this with poses
if table in known_poses:
y = 2
#y += round(uniform(-TOLERANCE, TOLERANCE), 3)
conf = (known_poses[table], y)
assert is_visible(table, conf)
else:
conf = 'q_vis_{}'.format(table)
yield (conf, )
def inverse_kinematics(pose): # TODO: list stream that uses ending info
# TODO: only do if localized as well?
# TODO: is it helpful to have this even if the raw value is kind of wrong (to steer the search)
if type(pose) != str:
y = 1
#y += round(uniform(-TOLERANCE, TOLERANCE), 3)
conf = (pose, y)
assert is_kinematic(pose, conf)
else:
conf = 'q_ik_{}'.format(pose)
yield (conf, )
def sample_table(table):
if table in known_poses:
pose = known_poses[table]
else:
pose = 'p_{}'.format(table)
yield (pose, )
####################
MAX_DISTANCE = 10
# TODO: maybe I don't need to worry about normalizing. I can just pretend non-parametric again for planning
def scan_surface_cost(
surface, obj): # TODO: what about multiple scans of the belief?
fail_cost = 100
surface_cl = class_from_name[surface]
obj_cl = class_from_name[obj]
prob = 1.0
if obj_cl in estimator.object_prior:
prob *= estimator.object_prior[obj_cl].get(surface_cl, 0)
if surface in known_poses:
prob *= estimator.object_octomaps[obj_cl].get_prob(
known_poses[surface])
else:
prob *= 0.1 # Low chance if you don't even know the table exists
# TODO: could even include the probability the table exists
#return expected_cost(1, fail_cost, prob)
return mdp_cost(1, fail_cost, prob)
def scan_room_cost(surface):
# TODO: try to prove some sort of bound on the cost to recover will suffice?
fail_cost = 100
cl = class_from_name[surface]
occupied_poses = {
known_poses[n]
for n in names_from_type[cl] if n in known_poses
}
p_failure = 1.0
for pose in estimator.poses:
if pose not in occupied_poses:
p_failure *= (1 -
estimator.surface_octomaps[cl].get_prob(pose))
return 1 * (1 - p_failure) + fail_cost * p_failure
def distance_cost(q1, q2):
if str in (type(q1), type(q2)):
return MAX_DISTANCE # TODO: take the max possible pose distance
# TODO: can use the info encoded within these to obtain better bounds
return np.linalg.norm(np.array(q2) - np.array(q1))
####################
# TODO: could add measured as the output to these
streams = [
GeneratorStream(inputs=[P1],
outputs=[Q1],
conditions=[],
effects=[IsKin(P1, Q1)],
generator=inverse_kinematics),
GeneratorStream(inputs=[S1],
outputs=[Q1],
conditions=[],
effects=[IsVisible(S1, Q1)],
generator=sample_visible),
GeneratorStream(inputs=[S1],
outputs=[P1],
conditions=[],
effects=[IsSupported(P1, S1)],
generator=sample_table),
CostStream(inputs=[S1, B1],
conditions=[],
effects=[ScanTable(S1, B1)],
function=scan_surface_cost),
CostStream(inputs=[Q1, Q2],
conditions=[],
effects=[Distance(Q1, Q2),
Distance(Q2, Q1)],
function=distance_cost),
CostStream(inputs=[S1],
conditions=[],
effects=[ScanRoom(S1)],
function=scan_room_cost),
# TODO: make an is original precondition and only apply these to original values?
# I suppose I could apply to all concrete things but that's likely not useful
#TestStream(inputs=[S1, Q1], conditions=[IsOriginal(Q1)], effects=[IsVisible(S1, Q1)],
# test=is_visible, eager=True),
#TestStream(inputs=[P1, Q1], conditions=[IsOriginal(Q1), IsOriginal(Q1)], effects=[IsKin(P1, Q1)],
# test=is_kinematic, eager=True),
#GeneratorStream(inputs=[P1], outputs=[Q1], conditions=[], effects=[IsVisible(P1, Q1)],
# generator=sample_visible),
]
problem = STRIPStreamProblem(initial_atoms, goal_formula, actions + axioms,
streams, [])
def command_from_action((action, args)):
if action.name == 'scan_room':
return simulate_scan, []
if action.name in ('scan_table', 'look_block'):
return simulate_look, []
if action.name == 'move':
q1, q2 = map(get_value, args)
return simulate_move, [q2]
if action.name == 'pick':
o, p, q = map(get_value, args)
return simulate_pick, [class_from_name[o]]
if action.name == 'place':
return simulate_place, []
raise ValueError(action.name)
return problem, command_from_action
def create_problem(dt, GoalTest, ClearTest, CalcDiffSystem, InitialState):
"""
Creates a generic non-holonomic motion planning problem
:return: a :class:`.STRIPStreamProblem`
"""
# Data types
X, DX, U = Type(), Type(), Type()
# Fluent predicates
AtX = Pred(X)
# Fluent predicates
GoalReached = Pred()
# Static predicates
ComputeDX = Pred(X, U, DX)
Dynamics = Pred(X, DX, X)
AtGoal = Pred(X)
Clear = Pred(X, X)
# Free parameters
X1, X2 = Param(X), Param(X)
DX1 = Param(DX)
U1 = Param(U)
rename_easy(locals()) # Trick to make debugging easier
####################
actions = [
Action(name='simulate',
parameters=[X1, U1, X2, DX1],
condition=And(AtX(X1), ComputeDX(X1, U1, DX1),
Dynamics(X1, DX1, X2), Clear(X1, X2)),
effect=And(Not(AtX(X1)), AtX(X2))),
]
axioms = [
Axiom(effect=GoalReached(), condition=Exists([X1], AtGoal(X1))),
]
####################
# Conditional stream declarations
def ComputeDXCalculator(X1F, DX1F):
X2F = X1F[:]
for i in range(len(X2F)):
X2F[i] = X1F[i] + dt * DX1F[i]
return X2F
cond_streams = [
FunctionStream(inputs=[X1, DX1],
outputs=[X2],
conditions=[],
effects=[Dynamics(X1, DX1, X2)],
function=ComputeDXCalculator),
FunctionStream(inputs=[X1, U1],
outputs=[DX1],
conditions=[],
effects=[ComputeDX(X1, U1, DX1)],
function=CalcDiffSystem),
TestStream(inputs=[X1, X2],
conditions=[],
effects=[Clear(X1, X2)],
test=ClearTest,
eager=True),
TestStream(inputs=[X1],
conditions=[],
effects=[AtGoal(X1)],
test=GoalTest,
eager=True),
]
####################
constants = [
# TODO - need to declare control inputs (or make a stream for them)
]
initial_atoms = [
AtX(InitialState),
]
goal_literals = [GoalReached()]
problem = STRIPStreamProblem(initial_atoms, goal_literals,
actions + axioms, cond_streams, constants)
return problem
# NOTE - can add the movable objects here
operators = [
# Without grasp trajectory
#Action(name='pick', parameters=[O, P, G, BQ, MQ],
# condition=And(PoseEq(O, P), HandEmpty(), BaseEq(BQ), ManipEq(MQ), Kin(P, G, BQ, MQ)), #ForAll([OB], Or(Equal(O, OB), Safe(OB, T))))),
# effect=And(GraspEq(O, G), Not(HandEmpty()), Not(PoseEq(O, P)))),
#
#Action(name='place', parameters=[O, P, G, BQ, MQ],
# condition=And(GraspEq(O, G), BaseEq(BQ), ManipEq(MQ), Kin(P, G, BQ, MQ),
# ForAll([O2], Or(Equal(O, O2), SafePose(O2, P)))),
# effect=And(PoseEq(O, P), HandEmpty(), Not(GraspEq(O, G)))),
# With grasp trajectory
Action(name='pick', parameters=[O, P, G, BQ, MQ, GT],
condition=And(PoseEq(O, P), HandEmpty(), BaseEq(BQ), ManipEq(MQ), GraspTraj(P, G, BQ, MQ, GT)),
effect=And(GraspEq(O, G), Not(HandEmpty()), Not(PoseEq(O, P)))),
Action(name='place', parameters=[O, P, G, BQ, MQ, GT],
condition=And(GraspEq(O, G), BaseEq(BQ), ManipEq(MQ), GraspTraj(P, G, BQ, MQ, GT),
ForAll([O2], Or(Equal(O, O2), SafePose(O2, P)))),
effect=And(PoseEq(O, P), HandEmpty(), Not(GraspEq(O, G)))),
# NOTE - I could make actions that backup or move forward instead
Action(name='move_arm', parameters=[MQ, MQ2, BQ, MT],
#condition=And(ManipEq(MQ), ManipMotion(MQ, MQ2, BQ, MT), BaseEq(BQ), ForAll([O2], SafePoseMove(O2, MT))),
condition=And(ManipEq(MQ), ManipMotion(MQ, MQ2, BQ, MT), BaseEq(BQ), ForAll([O2], SafeMove(O2, MT))),
#condition=And(ManipEq(MQ), ManipMotion(MQ, MQ2, BQ, MT), BaseEq(BQ),
# ForAll([O2], Or(SafeGraspMove(O2, MT), SafePoseMove(O2, MT)))), # NOTE - bad idea, creates one per each combo
effect=And(ManipEq(MQ2), Not(ManipEq(MQ)))),
####################
O, P, G = Param(OBJ), Param(POSE), Param(GRASP)
O2, P2 = Param(OBJ), Param(POSE)
Q, Q2 = Param(CONF), Param(CONF)
T = Param(TRAJ)
rename_easy(locals())
####################
actions = [
Action(name='pick', parameters=[O, P, G, Q, T],
condition=And(PoseEq(O, P), HandEmpty(), ConfEq(Q), GraspMotion(P, G, Q, T),
ForAll([O2], Or(Equal(O, O2), SafeTraj(O2, T)))),
#ForAll([O2], Or(Equal(O, O2), And(SafePose(O2, P), SafeGTraj(O2, GT))))),
effect=And(GraspEq(O, G), Not(HandEmpty()), Not(PoseEq(O, P)))),
Action(name='place', parameters=[O, P, G, Q, T],
condition=And(GraspEq(O, G), ConfEq(Q), GraspMotion(P, G, Q, T),
ForAll([O2], Or(Equal(O, O2), And(SafePose(O2, P), SafeTraj(O2, T))))),
effect=And(PoseEq(O, P), HandEmpty(), Not(GraspEq(O, G)))),
Action(name='move', parameters=[Q, Q2, T],
condition=And(ConfEq(Q), HandEmpty(), FreeMotion(Q, Q2, T),
ForAll([O2], SafeTraj(O2, T))),
effect=And(ConfEq(Q2), Not(ConfEq(Q)))),
Action(name='move_holding', parameters=[Q, Q2, T, O, G],
condition=And(ConfEq(Q), GraspEq(O, G), HoldingMotion(Q, Q2, G, T),
def solve_incrementally():
O = Param(OBJECT)
O1, O2 = Param(OBJECT), Param(OBJECT)
L = Param(LOCATION)
L_s, L_g = Param(LOCATION), Param(LOCATION) # generic location
Stove_l_s, Stove_l_g = Param(STOVE_L_S), Param(
STOVE_L_G) # locations for stove and sink
Sink_l_s, Sink_l_g = Param(SINK_L_S), Param(SINK_L_G)
actions = [
Action(name='wash',
parameters=[O],
condition=And(InSink(O)),
effect=And(Clean(O))),
Action(name='cook',
parameters=[O],
condition=And(InStove(O), Clean(O)),
effect=And(Cooked(O))),
Action(name='pickplace',
parameters=[O, L_s, L_g],
condition=And(EmptySweptVolume(O, L_s, L_g), AtPose(O, L_s)),
effect=And(AtPose(O, L_g),
Not(AtPose(O, L_s)))) # You should delete!
]
axioms = [
# For all objects in the world, either object is O1 or if not, then it is not in the region
Axiom(effect=EmptySweptVolume(O,L_s,L_g),condition=ForAll([O2],\
Or(Equal(O,O2),\
Exists([L],(And(AtPose(O2,L),OutsideRegion(O,O2,L,L_s,L_g))))))),
# Object is in the stove if it is at pose L for which Ls and Lg define stove
Axiom(effect=InStove(O),condition=Exists([L,L_s,L_g],And(AtPose(O,L), Contained(O,L,L_s,L_g), IsStove(L_s,L_g)))),
Axiom(effect=InSink(O),condition=Exists([L,L_s,L_g],And(AtPose(O,L), Contained(O,L,L_s,L_g), IsSink(L_s,L_g)))),
]
cond_streams = [
EasyGenStream(inputs=[O,L_s,L_g], outputs=[L], conditions=[IsSmaller(L_s,L_g)], effects=[Contained(O,L,L_s,L_g)],\
generator=lambda b, ls, lg: (sample_region_pose(b, ls, lg ) for _ in irange(0, INF))),
EasyTestStream(inputs=[L_s,L_g],conditions=[],effects=[IsSmaller(L_s,L_g)],test=is_smaller,eager=EAGER_TESTS),
# Generate static predicates that object is contained in sink for which Ls and Lg define the sink. If L was not continuous value,
# then we would define this in the intial condition and would not be changed by any of the actions (hence static predicate)
EasyTestStream(inputs=[L_s,L_g,O,L],conditions=[IsSink(L_s,L_g)],effects=[Contained(O,L,L_s,L_g)],test=in_region,eager=EAGER_TESTS),
EasyTestStream(inputs=[L_s,L_g,O,L],conditions=[IsStove(L_s,L_g)],effects=[Contained(O,L,L_s,L_g)],test=in_region,eager=EAGER_TESTS),
# OutsideRegion tests if O2 is is outside of the region (Ls,Lg)
EasyTestStream(inputs=[O,O2,L,L_s,L_g],conditions=[],effects=[OutsideRegion(O,O2,L,L_s,L_g)],test=not_in_region,eager=EAGER_TESTS),
]
####################
tamp_problem = sample_one_d_kitchen_problem()
# instantiate the environment region?
constants = [
STOVE_L_S(tamp_problem.stove_region_s),
STOVE_L_G(tamp_problem.stove_region_g),
SINK_L_S(tamp_problem.sink_region_s),
SINK_L_G(tamp_problem.sink_region_g),
]
# define initial state using initial poses of objects
initial_atoms = [
AtPose(block, pose)
for block, pose in tamp_problem.initial_poses.iteritems()
] + [IsSink(tamp_problem.sink_region_s, tamp_problem.sink_region_g)] + [
IsStove(tamp_problem.stove_region_s, tamp_problem.stove_region_g)
] # initial_atoms = static predicates, but on steroid
goal_literals = []
subgoal_list = [ InSink(tamp_problem.target_obj), \
InStove(tamp_problem.target_obj), Cooked(tamp_problem.target_obj) ]
for i in range(len(subgoal_list)):
goal_literals = [subgoal_list[0]]
stream_problem = STRIPStreamProblem(initial_atoms, goal_literals, \
actions+axioms, cond_streams, constants)
search = get_fast_downward('eager')
plan, universe = incremental_planner(stream_problem, search=search,\
frequency=1, verbose=True, max_time=200)
plan = convert_plan(plan)
# move the object to the new locations; todo: add new predicates
if len(plan) > 0: # if no action needed, keep last initial atoms
initial_atoms = []
for action in plan:
action_name = action[0].name
action_args = action[1]
if action_name == 'pickplace':
O = action_args[0].name
pick_l = action_args[1]
place_l = action_args[2]
block = [b for b in tamp_problem.blocks if b.name == O][0]
initial_atoms += [AtPose(block, place_l)]
if len(initial_atoms) == 1:
block = [b for b in tamp_problem.blocks if b.name != O][0]
initial_atoms += [AtPose(block, tamp_problem.initial_poses[block])]
initial_atoms += [
IsSink(tamp_problem.sink_region_s, tamp_problem.sink_region_g)
]
initial_atoms += [
IsStove(tamp_problem.stove_region_s, tamp_problem.stove_region_g)
]
