def generate_effector_trajectories_for_sequence(cfg, cs, generate_end_effector_traj, fullBody = None):
"""
Generate an effector trajectory for each effectors which are going to be in contact in the next phase
:param cfg: an instance of the configuration class
:param cs: the contact sequence
:param generate_end_effector_traj: a pointer to the method used to generate an end effector trajectory for one phase
:param fullBody: an instance of rbprm FullBody
:return: a new contact sequence, containing the same data as the one given as input
plus the effector trajectories for each swing phases
"""
cs_res = ContactSequence(cs)
effectors = cs_res.getAllEffectorsInContact()
previous_phase = None
for pid in range(cs_res.size()-1): # -1 as last phase never have effector trajectories
phase = cs_res.contactPhases[pid]
next_phase = cs_res.contactPhases[pid+1]
if pid > 0 :
previous_phase = cs_res.contactPhases[pid-1]
for eeName in effectors:
if not phase.isEffectorInContact(eeName) and next_phase.isEffectorInContact(eeName):
# eeName will be in compute in the next phase, a trajectory should be added in the current phase
placement_end = next_phase.contactPatch(eeName).placement
time_interval = [phase.timeInitial, phase.timeFinal]
if previous_phase is not None and previous_phase.isEffectorInContact(eeName):
placement_init = previous_phase.contactPatch(eeName).placement
else:
placement_init = effectorPlacementFromPhaseConfig(phase,eeName,fullBody)
# build the trajectory :
traj = generate_end_effector_traj(cfg, time_interval,placement_init,placement_end)
phase.addEffectorTrajectory(eeName,traj)
return cs_res
def generateEffectorTrajectoriesForSequence(cs, fullBody=None):
"""
Generate an effector trajectory for each effectors which are going to be in contact in the next phase
:param cs:
:return:
"""
cs_res = ContactSequence(cs)
effectors = cs_res.getAllEffectorsInContact()
previous_phase = None
for pid in range(
cs_res.size() -
1): # -1 as last phase never have effector trajectories
phase = cs_res.contactPhases[pid]
next_phase = cs_res.contactPhases[pid + 1]
if pid > 0:
previous_phase = cs_res.contactPhases[pid - 1]
for eeName in effectors:
if not phase.isEffectorInContact(
eeName) and next_phase.isEffectorInContact(eeName):
# eeName will be in compute in the next phase, a trajectory should be added in the current phase
placement_end = next_phase.contactPatch(eeName).placement
time_interval = [phase.timeInitial, phase.timeFinal]
if previous_phase is not None and previous_phase.isEffectorInContact(
eeName):
placement_init = previous_phase.contactPatch(
eeName).placement
else:
placement_init = effectorPlacementFromPhaseConfig(
phase, eeName, fullBody)
# build the trajectory :
traj = generateEndEffectorTraj(time_interval,
placement_init,
placement_end)
phase.addEffectorTrajectory(eeName, traj)
return cs_res
# INTTYPE = 'directSE3'
# INTTYPE = 'pinocchio'
PATH = 'figs_'+INTTYPE+'/'
cs = ContactSequence()
print('Loadding cs file: ', examples_dir + file_name)
cs.loadFromBinary(examples_dir + file_name)
q_traj = cs.concatenateQtrajectories()
dq_traj = cs.concatenateDQtrajectories()
ddq_traj = cs.concatenateDDQtrajectories()
c_traj = cs.concatenateCtrajectories()
dc_traj = cs.concatenateDCtrajectories()
Lc_traj = cs.concatenateLtrajectories()
contact_frames = cs.getAllEffectorsInContact()
f_traj_lst = [cs.concatenateContactForceTrajectories(l) for l in contact_frames]
print(contact_frames)
min_ts = q_traj.min()
max_ts = q_traj.max()
print('traj dur (s): ', max_ts - min_ts)
dt = 1e-3 # discretization timespan
# dt = 1e-2 # discretization timespan
t_arr = np.arange(min_ts, max_ts, dt)
q_arr = np.array([q_traj(t) for t in t_arr])
dq_arr = np.array([dq_traj(t) for t in t_arr])
ddq_arr = np.array([ddq_traj(t) for t in t_arr])
c_arr = np.array([c_traj(t) for t in t_arr])
def generate_wholebody_tsid(cfg, cs_ref, fullBody=None, viewer=None, robot=None, queue_qt = None):
"""
Generate the whole body motion corresponding to the given contactSequence
:param cs: Contact sequence containing the references,
it will only be modified if the end effector trajectories are not valid.
New references will be generated and added to the cs
:param fullBody: Required to compute collision free end effector trajectories
:param viewer: If provided, and the settings are enabled, display the end effector trajectories and the last step computed
:param robot: a tsid.RobotWrapper instance. If None, a new one is created from the urdf files defined in cfg
:param queue_qt: If not None, the joint trajectories are send to this multiprocessing.Queue during computation
The queue take a tuple: [q_t (a Curve object), ContactPhase (may be None), Bool (True mean that this is the
last trajectory of the motion)]
:return: a new ContactSequence object, containing the wholebody trajectories,
and the other trajectories computed from the wholebody motion request with cfg.IK_STORE_* and a robotWrapper instance
"""
# define nested functions used in control loop #
def appendJointsValues(first_iter_for_phase = False):
"""
Append the current q value to the current phase.q_t trajectory
:param first_iter_for_phase: if True, set the current phase.q_init value
and initialize a new Curve for phase.q_t
"""
if first_iter_for_phase:
phase.q_init = q
phase.q_t = piecewise(polynomial(q.reshape(-1,1), t, t))
#phase.root_t = piecewise_SE3(constantSE3curve(SE3FromConfig(q) ,t))
else:
phase.q_t.append(q, t)
#phase.root_t.append(SE3FromConfig(q), t)
if queue_qt:
queue_qt.put([phase.q_t.curve_at_index(phase.q_t.num_curves()-1),
phase.dq_t.curve_at_index(phase.dq_t.num_curves()-1),
None,
False])
def appendJointsDerivatives(first_iter_for_phase=False):
"""
Append the current v and dv value to the current phase.dq_t and phase.ddq_t trajectory
:param first_iter_for_phase: if True, initialize a new Curve for phase.dq_t and phase.ddq_t
"""
if first_iter_for_phase:
phase.dq_t = piecewise(polynomial(v.reshape(-1, 1), t, t))
phase.ddq_t = piecewise(polynomial(dv.reshape(-1, 1), t, t))
else:
phase.dq_t.append(v, t)
phase.ddq_t.append(dv, t)
def appendTorques(first_iter_for_phase = False):
"""
Append the current tau value to the current phase.tau_t trajectory
:param first_iter_for_phase: if True, initialize a new Curve for phase.tau_t
"""
tau = invdyn.getActuatorForces(sol)
if first_iter_for_phase:
phase.tau_t = piecewise(polynomial(tau.reshape(-1,1), t, t))
else:
phase.tau_t.append(tau, t)
def appendCentroidal(first_iter_for_phase = False):
"""
Compute the values of the CoM position, velocity, acceleration, the anuglar momentum and it's derivative
from the wholebody data and append them to the current phase trajectories
:param first_iter_for_phase: if True, set the initial values for the current phase
and initialize the centroidal trajectories
"""
pcom, vcom, acom = pinRobot.com(q, v, dv)
L = pinRobot.centroidalMomentum(q, v).angular
dL = pin.computeCentroidalMomentumTimeVariation(pinRobot.model, pinRobot.data, q, v, dv).angular
if first_iter_for_phase:
phase.c_init = pcom
phase.dc_init = vcom
phase.ddc_init = acom
phase.L_init = L
phase.dL_init = dL
phase.c_t = piecewise(polynomial(pcom.reshape(-1,1), t , t))
phase.dc_t = piecewise(polynomial(vcom.reshape(-1,1), t, t))
phase.ddc_t = piecewise(polynomial(acom.reshape(-1,1), t, t))
phase.L_t = piecewise(polynomial(L.reshape(-1,1), t, t))
phase.dL_t = piecewise(polynomial(dL.reshape(-1,1), t, t))
else:
phase.c_t.append(pcom, t)
phase.dc_t.append(vcom, t)
phase.ddc_t.append(acom, t)
phase.L_t.append(L, t)
phase.dL_t.append(dL, t)
def appendZMP(first_iter_for_phase = False):
"""
Compute the zmp from the current wholebody data and append it to the current phase
:param first_iter_for_phase: if True, initialize a new Curve for phase.zmp_t
"""
tau = pin.rnea(pinRobot.model, pinRobot.data, q, v, dv)
# tau without external forces, only used for the 6 first
# res.tau_t[:6,k_t] = tau[:6]
phi0 = pinRobot.data.oMi[1].act(Force(tau[:6]))
wrench = phi0.vector
zmp = shiftZMPtoFloorAltitude(cs, t, phi0, cfg.Robot)
if first_iter_for_phase:
phase.zmp_t = piecewise(polynomial(zmp.reshape(-1,1), t, t))
phase.wrench_t = piecewise(polynomial(wrench.reshape(-1,1), t, t))
else:
phase.zmp_t.append(zmp, t)
phase.wrench_t.append(wrench, t)
def appendEffectorsTraj(first_iter_for_phase = False):
"""
Append the current position of the effectors not in contact to the current phase trajectories
:param first_iter_for_phase: if True, initialize a new Curve for the phase effector trajectories
"""
if first_iter_for_phase and phase_prev:
for eeName in phase_prev.effectorsWithTrajectory():
if t > phase_prev.effectorTrajectory(eeName).max():
placement = getCurrentEffectorPosition(robot, invdyn.data(), eeName)
phase_prev.effectorTrajectory(eeName).append(placement, t)
for eeName in phase.effectorsWithTrajectory():
placement = getCurrentEffectorPosition(robot, invdyn.data(), eeName)
if first_iter_for_phase:
phase.addEffectorTrajectory(eeName, piecewise_SE3(constantSE3curve(placement, t)))
else:
phase.effectorTrajectory(eeName).append(placement, t)
def appendContactForcesTrajs(first_iter_for_phase = False):
"""
Append the current contact force value to the current phase, for all the effectors in contact
:param first_iter_for_phase: if True, initialize a new Curve for the phase contact trajectories
"""
for eeName in phase.effectorsInContact():
contact = dic_contacts[eeName]
if invdyn.checkContact(contact.name, sol):
contact_forces = invdyn.getContactForce(contact.name, sol)
contact_normal_force = np.array(contact.getNormalForce(contact_forces))
else:
logger.warning("invdyn check contact returned false while the reference contact is active !")
contact_normal_force = np.zeros(1)
if cfg.Robot.cType == "_3_DOF":
contact_forces = np.zeros(3)
else:
contact_forces = np.zeros(12)
if first_iter_for_phase:
phase.addContactForceTrajectory(eeName, piecewise(polynomial(contact_forces.reshape(-1,1), t, t)))
phase.addContactNormalForceTrajectory(eeName, piecewise(polynomial(contact_normal_force.reshape(1,1), t, t)))
else:
phase.contactForce(eeName).append(contact_forces, t)
phase.contactNormalForce(eeName).append(contact_normal_force.reshape(1), t)
def storeData(first_iter_for_phase = False):
"""
Append all the required data (selected in the configuration file) to the current ContactPhase
:param first_iter_for_phase: if True, set the initial values for the current phase
and correctly initiliaze empty trajectories for this phase
"""
if cfg.IK_store_joints_derivatives:
appendJointsDerivatives(first_iter_for_phase)
appendJointsValues(first_iter_for_phase)
if cfg.IK_store_joints_torque:
appendTorques(first_iter_for_phase)
if cfg.IK_store_centroidal:
appendCentroidal(first_iter_for_phase)
if cfg.IK_store_zmp:
appendZMP(first_iter_for_phase)
if cfg.IK_store_effector:
appendEffectorsTraj(first_iter_for_phase)
if cfg.IK_store_contact_forces:
appendContactForcesTrajs(first_iter_for_phase)
def printIntermediate():
"""
Print the current state: active contacts, tracking errors, computed joint acceleration and velocity
:return:
"""
if logger.isEnabledFor(logging.INFO):
print("Time %.3f" % (t))
for eeName, contact in dic_contacts.items():
if invdyn.checkContact(contact.name, sol):
f = invdyn.getContactForce(contact.name, sol)
print("\tnormal force %s: %.1f" % (contact.name.ljust(20, '.'), contact.getNormalForce(f)))
print("\ttracking err %s: %.3f" % (comTask.name.ljust(20, '.'), norm(comTask.position_error, 2)))
for eeName in phase.effectorsWithTrajectory():
task = dic_effectors_tasks[eeName]
error = task.position_error
if cfg.Robot.cType == "_3_DOF":
error = error[0:3]
print("\ttracking err %s: %.3f" % (task.name.ljust(20, '.'), norm(error, 2)))
print("\t||v||: %.3f\t ||dv||: %.3f" % (norm(v, 2), norm(dv)))
def checkDiverge():
"""
Check if either the joint velocity or acceleration is over a treshold or is NaN, and raise an error
"""
if norm(dv) > 1e6 or norm(v) > 1e6:
logger.error("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
logger.error("/!\ ABORT : controler unstable at t = %f /!\ ", t)
logger.error("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
raise ValueError("ABORT : controler unstable at t = " + str(t))
if math.isnan(norm(dv)) or math.isnan(norm(v)):
logger.error("!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
logger.error("/!\ ABORT : nan at t = %f /!\ ", t)
logger.error("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
raise ValueError("ABORT : controler unstable at t = " + str(t))
def stopHere():
"""
Set the current data as final values for the current phase, resize the contact sequence if needed and return
:return: [The current ContactSequence, the RobotWrapper]
"""
setPreviousFinalValues(phase_prev, phase, cfg)
if cfg.WB_ABORT_WHEN_INVALID:
# cut the sequence up to the last phase
cs.resize(pid)
return cs, robot
elif cfg.WB_RETURN_INVALID:
# cut the sequence up to the current phase
cs.resize(pid+1)
return cs, robot
### End of nested functions definitions ###
if not viewer:
logger.warning("No viewer linked, cannot display end_effector trajectories.")
logger.warning("Start TSID ... ")
# copy the given contact sequence to keep it as reference :
cs = ContactSequence(cs_ref)
# delete all the 'reference' trajectories from result (to leave room for the real trajectories stored)
deleteAllTrajectories(cs)
# Create a robot wrapper
if robot is None or cfg.IK_store_centroidal or cfg.IK_store_zmp:
rp = RosPack()
package_name = cfg.Robot.packageName.split("/")[0]
package_path = rp.get_path(package_name)
urdf = package_path + cfg.Robot.packageName.lstrip(
package_name) + '/urdf/' + cfg.Robot.urdfName + cfg.Robot.urdfSuffix + '.urdf'
logger.info("load robot : %s", urdf)
if robot is None:
logger.info("load robot : %s", urdf)
robot = tsid.RobotWrapper(urdf, pin.StdVec_StdString(), pin.JointModelFreeFlyer(), False)
else:
logger.info("Use given robot in tsid.")
logger.info("robot loaded in tsid.")
if cfg.IK_store_centroidal or cfg.IK_store_zmp:
logger.info("load pinocchio robot ...")
# FIXME : tsid robotWrapper don't have all the required methods, only pinocchio have them
pinRobot = pin.RobotWrapper.BuildFromURDF(urdf, package_path, pin.JointModelFreeFlyer())
logger.info("pinocchio robot loaded.")
# get the selected end effector trajectory generation method
effectorMethod, effectorCanRetry = cfg.get_effector_method()
# get the selected simulator method
Simulator = cfg.get_simulator_class()
simulator = Simulator(cfg.IK_dt, robot.model())
### Define initial state of the robot ###
phase0 = cs.contactPhases[0]
q = phase0.q_init[:robot.nq].copy()
if not q.any():
raise RuntimeError("The contact sequence doesn't contain an initial whole body configuration")
t = phase0.timeInitial
if cs_ref.contactPhases[0].dq_t and cs_ref.contactPhases[0].dq_t.min() <= t <= cs_ref.contactPhases[0].dq_t.max():
v = cs_ref.contactPhases[0].dq_t(t)
else:
v = np.zeros(robot.nv)
logger.debug("V_init used in tsid : %s", v)
invdyn = tsid.InverseDynamicsFormulationAccForce("tsid", robot, False)
invdyn.computeProblemData(t, q, v)
simulator.init(q, v)
# add initial contacts :
dic_contacts = {}
for eeName in cs.contactPhases[0].effectorsInContact():
# replace the initial contact patch placements if needed to match exactly the current position in the problem:
updateContactPlacement(cs, 0, eeName,
getCurrentEffectorPosition(robot, invdyn.data(), eeName),
cfg.Robot.cType == "_6_DOF")
# create the contacts :
contact = createContactForEffector(cfg, invdyn, robot, eeName, phase0.contactPatch(eeName), False)
dic_contacts.update({eeName: contact})
if cfg.EFF_CHECK_COLLISION: # initialise object needed to check the motion
from mlp.utils import check_path
validator = check_path.PathChecker(fullBody, cfg.CHECK_DT, logger.isEnabledFor(logging.INFO))
### Initialize all task used ###
logger.info("initialize tasks : ")
if cfg.w_com > 0. :
comTask = tsid.TaskComEquality("task-com", robot)
comTask.setKp(cfg.kp_com * np.ones(3))
comTask.setKd(2.0 * np.sqrt(cfg.kp_com) * np.ones(3))
invdyn.addMotionTask(comTask, cfg.w_com, cfg.level_com, 0.0)
else:
comTask = None
if cfg.w_am > 0.:
amTask = tsid.TaskAMEquality("task-am", robot)
amTask.setKp(cfg.kp_am * np.array([1., 1., 0.]))
amTask.setKd(2.0 * np.sqrt(cfg.kp_am * np.array([1., 1., 0.])))
invdyn.addMotionTask(amTask, cfg.w_am, cfg.level_am, 0.)
else:
amTask = None
if cfg.w_posture > 0.:
postureTask = tsid.TaskJointPosture("task-joint-posture", robot)
postureTask.setKp(cfg.kp_posture * cfg.gain_vector)
postureTask.setKd(2.0 * np.sqrt(cfg.kp_posture * cfg.gain_vector))
postureTask.setMask(cfg.masks_posture)
invdyn.addMotionTask(postureTask, cfg.w_posture, cfg.level_posture, 0.0)
q_ref = cfg.IK_REFERENCE_CONFIG
samplePosture = tsid.TrajectorySample(q_ref.shape[0] - 7)
samplePosture.pos(q_ref[7:]) # -7 because we remove the freeflyer part
else :
postureTask = None
if cfg.w_rootOrientation > 0. :
orientationRootTask = tsid.TaskSE3Equality("task-orientation-root", robot, 'root_joint')
mask = np.ones(6)
mask[0:3] = 0
mask[5] = cfg.YAW_ROT_GAIN
orientationRootTask.setMask(mask)
orientationRootTask.setKp(cfg.kp_rootOrientation * mask)
orientationRootTask.setKd(2.0 * np.sqrt(cfg.kp_rootOrientation * mask))
invdyn.addMotionTask(orientationRootTask, cfg.w_rootOrientation, cfg.level_rootOrientation, 0.0)
else:
orientationRootTask = None
# init effector task objects :
usedEffectors = cs.getAllEffectorsInContact()
dic_effectors_tasks = createEffectorTasksDic(cfg, usedEffectors, robot)
# Add bounds tasks if required:
if cfg.w_torque_bounds > 0.:
tau_max = cfg.scaling_torque_bounds*robot.model().effortLimit[-robot.na:]
tau_min = -tau_max
actuationBoundsTask = tsid.TaskActuationBounds("task-actuation-bounds", robot)
actuationBoundsTask.setBounds(tau_min, tau_max)
invdyn.addActuationTask(actuationBoundsTask, cfg.w_torque_bounds, 0, 0.0)
if cfg.w_joint_bounds > 0.:
jointBoundsTask = tsid.TaskJointBounds("task-joint-bounds", robot, cfg.IK_dt)
v_max = cfg.scaling_vel_bounds * robot.model().velocityLimit[-robot.na:]
v_min = -v_max
print("v_max : ", v_max)
jointBoundsTask.setVelocityBounds(v_min, v_max)
invdyn.addMotionTask(jointBoundsTask, cfg.w_joint_bounds, 0, 0.0)
solver = tsid.SolverHQuadProg("qp solver")
solver.resize(invdyn.nVar, invdyn.nEq, invdyn.nIn)
# time check
dt = cfg.IK_dt
logger.info("dt : %f", dt)
logger.info("tsid initialized, start control loop")
#raw_input("Enter to start the motion (motion displayed as it's computed, may be slower than real-time)")
time_start = time.time()
# For each phases, create the necessary task and references trajectories :
for pid in range(cs.size()):
logger.info("## for phase : %d", pid)
logger.info("t = %f", t)
# phase_ref contains the reference trajectories and should not be modified exept for new effector trajectories
# when the first ones was not collision free
phase_ref = cs_ref.contactPhases[pid]
# phase de not contains trajectories (exept for the end effectors) and should be modified with the new values computed
phase = cs.contactPhases[pid]
if pid > 0:
phase_prev = cs.contactPhases[pid - 1]
else:
phase_prev = None
if pid < cs.size() - 1:
phase_next = cs.contactPhases[pid + 1]
else:
phase_next = None
time_interval = [phase_ref.timeInitial, phase_ref.timeFinal]
logger.info("time_interval %s", time_interval)
# take CoM and AM trajectory from the phase, with their derivatives
com_traj = [phase_ref.c_t, phase_ref.dc_t, phase_ref.ddc_t]
am_traj = [phase_ref.L_t, phase_ref.L_t, phase_ref.dL_t]
# add root's orientation ref from reference config :
root_traj = phase_ref.root_t
# add se3 tasks for end effector when required
for eeName in phase.effectorsWithTrajectory():
logger.info("add se3 task for %s", eeName)
task = dic_effectors_tasks[eeName]
invdyn.addMotionTask(task, cfg.w_eff, cfg.level_eff, 0.)
adjustEndEffectorTrajectoryIfNeeded(cfg, phase_ref, robot, invdyn.data(), eeName, effectorMethod)
logger.info("t interval : %s", time_interval)
# add newly created contacts :
new_contacts_names = [] # will store the names of the contact tasks created at this phase
for eeName in usedEffectors:
if phase_prev and phase_ref.isEffectorInContact(eeName) and not phase_prev.isEffectorInContact(eeName):
invdyn.removeTask(dic_effectors_tasks[eeName].name, 0.0) # remove pin task for this contact
logger.info("remove se3 effector task : %s", dic_effectors_tasks[eeName].name)
if logger.isEnabledFor(logging.DEBUG):
current_placement = getCurrentEffectorPosition(robot, invdyn.data(), eeName)
logger.debug("Current effector placement : %s", current_placement)
logger.debug("Reference effector placement : %s", cs.contactPhases[pid].contactPatch(eeName).placement)
updateContactPlacement(cs, pid, eeName,
getCurrentEffectorPosition(robot, invdyn.data(), eeName),
cfg.Robot.cType == "_6_DOF")
contact = createContactForEffector(cfg, invdyn, robot, eeName, phase.contactPatch(eeName))
new_contacts_names += [contact.name]
dic_contacts.update({eeName: contact})
logger.info("Create contact for : %s", eeName)
# start removing the contact that will be broken in the next phase :
# (This tell the solver that it should start minimizing the contact force on this contact, and ideally get to 0 at the given time)
for eeName, contact in dic_contacts.items():
if phase_next and phase.isEffectorInContact(eeName) and not phase_next.isEffectorInContact(eeName):
transition_time = phase.duration + dt/2.
logger.info("\nTime %.3f Start breaking contact %s. transition time : %.3f\n",
t, contact.name, transition_time)
exist = invdyn.removeRigidContact(contact.name, transition_time)
assert exist, "Try to remove a non existing contact !"
# Remove all effectors not in contact at this phase,
# This is required as the block above may not remove the contact exactly at the desired time
# FIXME: why is it required ? Numerical approximation in the transition_time ?
for eeName, contact in dic_contacts.items():
if not phase.isEffectorInContact(eeName):
exist = invdyn.removeRigidContact(contact.name, 0.)
if exist:
logger.warning("Contact "+eeName+" was not remove after the given transition time.")
if cfg.WB_STOP_AT_EACH_PHASE:
input('start simulation')
# save values at the beginning of the current phase
q_begin = q.copy()
v_begin = v.copy()
phase.q_init = q_begin
if phase_prev:
phase_prev.q_final = q_begin
phaseValid = False
iter_for_phase = -1
# iterate until a valid motion for this phase is found (ie. collision free and which respect joint-limits)
while not phaseValid:
deletePhaseWBtrajectories(phase) # clean previous invalid trajectories
t = phase.timeInitial
k_t = 0
if iter_for_phase >= 0:
# reset values to their value at the beginning of the current phase
q = q_begin.copy()
v = v_begin.copy()
simulator.q = q
simulator.v = v
iter_for_phase += 1
logger.info("Start computation for phase %d , t = %f, try number : %d", pid, t, iter_for_phase)
# loop to generate states (q,v,a) for the current contact phase :
while t < phase.timeFinal - (dt / 2.):
# set traj reference for current time :
# com
if comTask:
sampleCom = curvesToTSID(com_traj,t)
comTask.setReference(sampleCom)
# am
if amTask:
if cfg.IK_trackAM:
sampleAM = curvesToTSID(am_traj,t)
else:
sampleAM = tsid.TrajectorySample(3)
amTask.setReference(sampleAM)
# posture
#print "postural task ref : ",samplePosture.pos()
if postureTask:
postureTask.setReference(samplePosture)
# root orientation :
if orientationRootTask:
sampleRoot = curveSE3toTSID(root_traj,t)
orientationRootTask.setReference(sampleRoot)
# update weight of regularization tasks for the new contacts:
if len(new_contacts_names) > 0 :
# linearly decrease the weight of the tasks for the newly created contacts
u_w_force = (t - phase.timeInitial) / (phase.duration * cfg.w_forceRef_time_ratio)
if u_w_force <= 1.:
current_w_force = cfg.w_forceRef_init * (1. - u_w_force) + cfg.w_forceRef_end * u_w_force
for contact_name in new_contacts_names:
success = invdyn.updateRigidContactWeights(contact_name, current_w_force)
assert success, "Unable to change the weight of the force regularization task for contact "+contact_name
logger.debug("### references given : ###")
logger.debug("com pos : %s", sampleCom.pos())
logger.debug("com vel : %s", sampleCom.vel())
logger.debug("com acc : %s", sampleCom.acc())
if amTask:
logger.debug("AM pos : %s", sampleAM.pos())
logger.debug("AM vel : %s", sampleAM.vel())
logger.debug("root pos : %s", sampleRoot.pos())
logger.debug("root vel : %s", sampleRoot.vel())
# end effector (if they exists)
for eeName, traj in phase_ref.effectorTrajectories().items():
sampleEff = curveSE3toTSID(traj,t,True)
dic_effectors_tasks[eeName].setReference(sampleEff)
logger.debug("effector %s, pos = %s", eeName, sampleEff.pos())
logger.debug("effector %s, vel = %s", eeName, sampleEff.vel())
logger.debug("previous q = %s", q)
logger.debug("previous v = %s", v)
# solve HQP for the current time
HQPData = invdyn.computeProblemData(t, q, v)
if t < phase.timeInitial + dt:
logger.info("final data for phase %d", pid)
if logger.isEnabledFor(logging.INFO):
HQPData.print_all()
sol = solver.solve(HQPData)
dv = invdyn.getAccelerations(sol)
storeData(k_t == 0)
q, v = simulator.simulate(dv)
t += dt
k_t += 1
if t >= phase.timeFinal - (dt / 2.):
t = phase.timeFinal # avoid numerical imprecisions
logger.debug("v = %s", v)
logger.debug("dv = %s", dv)
if int(t / dt) % cfg.IK_PRINT_N == 0:
printIntermediate()
try:
checkDiverge()
except ValueError:
return stopHere()
# end while t \in phase_t (loop for the current contact phase)
if len(phase.effectorsWithTrajectory()) > 0 and cfg.EFF_CHECK_COLLISION:
phaseValid, t_invalid = validator.check_motion(phase.q_t)
#if iter_for_phase < 3 :# debug only, force limb-rrt
# phaseValid = False
# t_invalid = (phase.timeInitial + phase.timeFinal) / 2.
if not phaseValid:
if iter_for_phase == 0:
# save the first q_t trajectory computed, for limb-rrt
first_q_t = phase.q_t
logger.warning("Phase %d not valid at t = %f", pid, t_invalid)
logger.info("First invalid q : %s", phase.q_t(t_invalid))
if t_invalid <= (phase.timeInitial + cfg.EFF_T_PREDEF) \
or t_invalid >= (phase.timeFinal - cfg.EFF_T_PREDEF):
logger.error("Motion is invalid during predefined phases, cannot change this.")
return stopHere()
if effectorCanRetry():
logger.warning("Try new end effector trajectory.")
try:
for eeName, ref_traj in phase_ref.effectorTrajectories().items():
placement_init = ref_traj.evaluateAsSE3(phase.timeInitial)
placement_end = ref_traj.evaluateAsSE3(phase.timeFinal)
traj = effectorMethod(cfg, time_interval, placement_init, placement_end,
iter_for_phase + 1, first_q_t, phase_prev,
phase_ref, phase_next, fullBody, eeName, viewer)
# save the new trajectory in the phase with the references
phase_ref.addEffectorTrajectory(eeName,traj)
if cfg.DISPLAY_ALL_FEET_TRAJ and logger.isEnabledFor(logging.INFO):
color = fullBody.dict_limb_color_traj[eeName]
color[-1] = 0.6 # set small transparency
display_tools.displaySE3Traj(phase_ref.effectorTrajectory(eeName),
viewer.client.gui,
viewer.sceneName,
eeName + "_traj_" + str(pid) + "_" + str(iter_for_phase),
color,
[phase.timeInitial, phase.timeFinal],
fullBody.dict_offset[eeName])
except ValueError as e:
logging.error("ERROR in generateEndEffectorTraj :", exc_info=e)
return stopHere()
else:
logging.error("End effector method choosen do not allow retries, abort here.")
return stopHere()
else: # no effector motions, phase always valid (or bypass the check)
phaseValid = True
logging.info("Phase %d valid.", pid)
if phaseValid:
setPreviousFinalValues(phase_prev, phase, cfg)
# display the progress by moving the robot at the last configuration computed
if viewer and cfg.IK_SHOW_PROGRESS:
display_tools.displayWBconfig(viewer,q)
#end while not phaseValid
# end for all phases
# store the data of the last point
phase_prev = phase
phase = ContactPhase(phase_prev)
storeData(True)
setPreviousFinalValues(phase_prev, phase, cfg)
time_end = time.time() - time_start
logger.warning("Whole body motion generated in : %f s.", time_end)
logger.info("\nFinal COM Position %s", robot.com(invdyn.data()))
logger.info("Desired COM Position %s", cs.contactPhases[-1].c_final)
if queue_qt:
queue_qt.put([phase.q_t.curve_at_index(phase.q_t.num_curves() - 1), None, True])
return cs, robot
# cs_file_name = 'solo_nomove.cs'
# cs_file_name = 'solo_sin_y_notrunk.cs'
cs_file_name = 'solo_sin_y_notrunk_Pyb_Nofeet.cs'
cs_file_path = cs_file_dir + cs_file_name
cs = ContactSequence()
cs.loadFromBinary(cs_file_path)
##############################################
# extract raw trajectory from contact sequence
##############################################
q_traj = cs.concatenateQtrajectories()
dq_traj = cs.concatenateDQtrajectories()
ddq_traj = cs.concatenateDDQtrajectories()
tau_traj = cs.concatenateTauTrajectories()
leg_name_lst = cs.getAllEffectorsInContact()
print('EE in contact')
print(leg_name_lst)
leg_cforces_traj_lst = [cs.concatenateContactForceTrajectories(leg_name) for leg_name in leg_name_lst]
min_ts = q_traj.min()
max_ts = q_traj.max()
dt = 1e-3 # discretization timespan
t_arr = np.arange(min_ts, max_ts, dt)
N = t_arr.shape[0] # nb of discretized timestamps
# #####
# # for testing
# N = 1000
# t_arr = t_arr[:N]
# ####