def stare_chain_thread(self, index):
index = int(index)
rate = rospy.Rate(10)
while self.stare_landmark_init:
# Compute Transformation
angle = euler_from_quaternion([
self.map.landmark[index].pose.pose.orientation.x,
self.map.landmark[index].pose.pose.orientation.y,
self.map.landmark[index].pose.pose.orientation.z,
self.map.landmark[index].pose.pose.orientation.w
])
O = PyKDL.Rotation.RPY(angle[0], angle[1], angle[2])
t = PyKDL.Vector(self.map.landmark[index].pose.pose.position.x,
self.map.landmark[index].pose.pose.position.y,
self.map.landmark[index].pose.pose.position.z)
wTl = PyKDL.Frame(O, t)
wTo = wTl * self.offset_transformation
orientation = wTo.M.GetRPY()
position = wTo.p
wwr = WorldWaypointReq()
wwr.header.stamp = rospy.Time().now()
wwr.goal = GoalDescriptor(self.name, 1,
GoalDescriptor.PRIORITY_NORMAL)
wwr.altitude_mode = False
wwr.position.north = position[0]
wwr.position.east = position[1]
wwr.position.depth = position[2]
wwr.altitude = 5.0
wwr.orientation.roll = orientation[0]
wwr.orientation.pitch = orientation[1]
wwr.orientation.yaw = orientation[2]
wwr.disable_axis.x = False
wwr.disable_axis.y = False
wwr.disable_axis.z = True
wwr.disable_axis.roll = True
wwr.disable_axis.pitch = True
wwr.disable_axis.yaw = False
self.pub_world_waypoint_req.publish(wwr)
print 'publish:\n', wwr
if not self.keep_pose:
self.check_tolerance(wwr)
rate.sleep()
def test_transform(self):
b = tf2_ros.Buffer()
t = TransformStamped()
t.transform.translation.x = 1
t.transform.rotation.x = 1
t.header.stamp = rospy.Time(2.0)
t.header.frame_id = 'a'
t.child_frame_id = 'b'
b.set_transform(t, 'eitan_rocks')
out = b.lookup_transform('a','b', rospy.Time(2.0), rospy.Duration(2.0))
self.assertEqual(out.transform.translation.x, 1)
self.assertEqual(out.transform.rotation.x, 1)
self.assertEqual(out.header.frame_id, 'a')
self.assertEqual(out.child_frame_id, 'b')
v = PyKDL.Vector(1,2,3)
out = b.transform(tf2_ros.Stamped(v, rospy.Time(2), 'a'), 'b')
self.assertEqual(out.x(), 0)
self.assertEqual(out.y(), -2)
self.assertEqual(out.z(), -3)
f = PyKDL.Frame(PyKDL.Rotation.RPY(1,2,3), PyKDL.Vector(1,2,3))
out = b.transform(tf2_ros.Stamped(f, rospy.Time(2), 'a'), 'b')
print out
self.assertEqual(out.p.x(), 0)
self.assertEqual(out.p.y(), -2)
self.assertEqual(out.p.z(), -3)
# TODO(tfoote) check values of rotation
t = PyKDL.Twist(PyKDL.Vector(1,2,3), PyKDL.Vector(4,5,6))
out = b.transform(tf2_ros.Stamped(t, rospy.Time(2), 'a'), 'b')
self.assertEqual(out.vel.x(), 1)
self.assertEqual(out.vel.y(), -8)
self.assertEqual(out.vel.z(), 2)
self.assertEqual(out.rot.x(), 4)
self.assertEqual(out.rot.y(), -5)
self.assertEqual(out.rot.z(), -6)
w = PyKDL.Wrench(PyKDL.Vector(1,2,3), PyKDL.Vector(4,5,6))
out = b.transform(tf2_ros.Stamped(w, rospy.Time(2), 'a'), 'b')
self.assertEqual(out.force.x(), 1)
self.assertEqual(out.force.y(), -2)
self.assertEqual(out.force.z(), -3)
self.assertEqual(out.torque.x(), 4)
self.assertEqual(out.torque.y(), -8)
self.assertEqual(out.torque.z(), -4)
def _set_waypoint(self, intersection_point, person_position):
""" Puts the goal as a waypoint in ED
:param intersection_point: geometry_msgs PointStamped of the last raytrace intersection (in map)
:param person_position: geometry_msgs PointStamped of the last measured person position (in map)
"""
yaw = math.atan2(person_position.point.y - intersection_point.point.y,
person_position.point.x - intersection_point.point.x)
position = kdl.Vector(intersection_point.point.x,
intersection_point.point.y, 0.0)
orientation = kdl.Rotation.RPY(0.0, 0.0, yaw)
waypoint = FrameStamped(frame=kdl.Frame(orientation, position),
frame_id="/map")
self.robot.ed.update_entity(id=self.waypoint_id,
type="waypoint",
frame_stamped=waypoint)
# import ipdb;ipdb.set_trace()
return
def resolve(self):
return Entity(
identifier="foo",
object_type=None,
frame_id="/map",
pose=kdl.Frame(),
shape=None,
volumes={
"on_top_of":
BoxVolume(
kdl.Vector(-1.0, -1.0, -1.0),
kdl.Vector(1.0, 1.0, 1.0),
)
},
super_types=[],
last_update_time=None,
)
def move_psm3_to(self,new_position):
'''
new position vector is given with respect to world coordinates
'''
if self.tf_world_psm3b is None:
print("no transformation to move the robot")
exit(0)
#add the offset
new_position = new_position
#Transform to psmb
new_position = self.tf_world_psm3b.Inverse() * new_position
# print("moving to new location:")
# self.print_vect(new_position)
self.api_psm3_arm.move(PyKDL.Frame(self.fix_orientation, new_position))
def test_matrix(arm, speed=0.05, frame=PyKDL.Frame()):
r = 0.05 #amplitude
theta = np.repeat(np.linspace(0, np.pi / 2, 3),
3) #must multiply to equal each other.
phi = np.tile(np.linspace(0, np.pi / 2, 3), 3)
#calculating cartesian motions
x = r * np.sin(theta) * np.cos(phi)
y = r * np.sin(theta) * np.sin(phi)
z = r * np.cos(theta)
z_home = -0.1135
for a, b, c in zip(x[2:], y[2:], z[2:]):
print(a, b, c)
vmove(arm, PyKDL.Vector(a, b, c + z_home), speed, frame)
rospy.sleep(1)
vmove(arm, PyKDL.Vector(0, 0, z_home), speed, frame)
rospy.sleep(1)
def transform(frontier_tf):
global current_submap_poses
while len(current_submap_poses) == 0:
pass
for frontier in frontier_tf: #sada je svaki frontier oblik FrontierTF ima submapIndex, trajectory_id i transform
if (frontier.trajectory_id,
frontier.submapIndex) in current_submap_poses:
pomocni = posemath.toMsg(
current_submap_poses[frontier.trajectory_id,
frontier.submapIndex] *
PyKDL.Frame(
PyKDL.Rotation.Identity(),
PyKDL.Vector(frontier.transform.x, frontier.transform.y,
0.0)))
frontier.projected = pomocni.position
def inverseKinematics(robotChain,
pos,
rot,
qGuess=None,
minJoints=None,
maxJoints=None):
"""
Perform inverse kinematics
Args:
robotChain: robot's chain object
pos: 1 x 3 or 3 x 1 array of the end effector position.
rot: 3 x 3 array of the end effector rotation
qGuess: guess values for the joint positions
minJoints: minimum value of the position for each joint
maxJoints: maximum value of the position for each joint
Returns:
list of joint positions or None (no solution)
"""
posKdl = kdl.Vector(pos[0], pos[1], pos[2])
rotKdl = kdl.Rotation(rot[0, 0], rot[0, 1], rot[0, 2], rot[1, 0],
rot[1, 1], rot[1, 2], rot[2, 0], rot[2, 1], rot[2,
2])
frameKdl = kdl.Frame(rotKdl, posKdl)
numJoints = robotChain.getNrOfJoints()
minJoints = -np.pi * np.ones(numJoints) if minJoints is None else minJoints
maxJoints = np.pi * np.ones(numJoints) if maxJoints is None else maxJoints
minsKdl = jointListToKdl(minJoints)
maxsKdl = jointListToKdl(maxJoints)
fkKdl = kdl.ChainFkSolverPos_recursive(robotChain)
ikVKdl = kdl.ChainIkSolverVel_pinv(robotChain)
ikPKdl = kdl.ChainIkSolverPos_NR_JL(robotChain, minsKdl, maxsKdl, fkKdl,
ikVKdl)
if qGuess is None:
# use the midpoint of the joint limits as the guess
lowerLim = np.where(np.isfinite(minJoints), minJoints, 0.)
upperLim = np.where(np.isfinite(maxJoints), maxJoints, 0.)
qGuess = (lowerLim + upperLim) / 2.0
qGuess = np.where(np.isnan(qGuess), [0.] * len(qGuess), qGuess)
qKdl = kdl.JntArray(numJoints)
qGuessKdl = jointListToKdl(qGuess)
if ikPKdl.CartToJnt(qGuessKdl, frameKdl, qKdl) >= 0:
return jointKdlToList(qKdl)
else:
return None
def callback(msg):
if (msg.num_people_detected == 1):
#Only publish when exactly one person is detected
print("Exactly one person detected")
global q_solved
############
# Solve IK #
############
#initial joint positions
q_init = kdl.JntArray(chain_RHand.getNrOfJoints())
for i in q_solved:
q_init[i] = i
q_solved = kdl.JntArray(chain_RHand.getNrOfJoints())
if (msg.right_wrist.x == "nan"):
print("No right wrist detected")
else:
print(msg.person_ID)
x, y, z, = msg.right_wrist.x, msg.right_wrist.y, msg.right_wrist.z #Assign x, y and z with the coordinates from right_wrist
#desired final cartesian position
posVec = kdl.Vector(x, y, z)
F_des = kdl.Frame(posVec)
IK_RHand.CartToJnt(q_init, F_des, q_solved)
#convert to np (for purposes of printing)
q_solved = np.array([q_solved[i] for i in range(q_solved.rows())])
#publish and print desired final joint positions
publisher.send({jnt: q_solved[i] for i, jnt in enumerate(Rarm_joints)})
print(q_solved)
elif (msg.num_people_detected == 0):
print("No person detected")
else:
print("Too many people detected!", msg.num_people_detected)
def move_end_effector_to_cartesian_position_and_angle_and_wrench(
which_hand, angleX, angleY, angleZ, x, y, z, imp_list, imp_times,
max_wrench, path_tool_tolerance, time):
global velma
T_hand = PyKDL.Frame(PyKDL.Rotation.RPY(angleX, angleY, angleZ),
PyKDL.Vector(x, y, z))
if which_hand == RIGHT_HAND:
if not velma.moveCartImpRight([T_hand],
time,
None,
None,
imp_list,
imp_times,
max_wrench,
start_time=0.5,
path_tol=path_tool_tolerance):
exitError(13)
error = velma.waitForEffectorRight()
if error != 0:
if error == PATH_TOLERANCE_VIOLATED_ERROR:
return PATH_TOLERANCE_VIOLATED_ERROR
elif which_hand == LEFT_HAND:
if not velma.moveCartImpLeft([T_hand], [3.0],
None,
None,
imp_list,
imp_times,
max_wrench,
start_time=0.5,
path_tol=path_tool_tolerance):
exitError(13)
error = velma.waitForEffectorLeft()
if error != 0:
if error == PATH_TOLERANCE_VIOLATED_ERROR:
return PATH_TOLERANCE_VIOLATED_ERROR
else:
print "Error - none hand has been specified!"
rospy.sleep(0.2)
# Check precision
if which_hand == RIGHT_HAND:
T_hand_diff = PyKDL.diff(T_hand, velma.getTf("B", "Tr"), 1.0)
if T_hand_diff.vel.Norm() > 0.05 or T_hand_diff.rot.Norm() > 0.05:
print "Precision for right hand is not perfect!"
elif which_hand == LEFT_HAND:
print "d 1.13 - check precision for the left hand - later"
def cartesian_goal(self, goal):
rospy.loginfo(rospy.get_caller_id() + '-> starting cartesian goal')
self.prepare_cartesian()
cart_goal = PyKDL.Frame()
cart_goal.p = self.arm.get_desired_position().p
cart_goal.M = self.arm.get_desired_position().M
# Translation motion
cart_goal.p[0] = goal.pose.position.x
cart_goal.p[1] = goal.pose.position.y
if goal.pose.position.z > -0.120:
cart_goal.p[2] = -0.121
rospy.loginfo("Defaulting to -0.121 z value")
else:
cart_goal.p[2] = goal.pose.position.z
# # Rotation motion
# cart_goal.M = PyKDL.Rotation.Quaternion(
# goal.pose.orientation.x,
# goal.pose.orientation.y,
# goal.pose.orientation.z, goal.pose.orientation.w)
# r, p, yaw = cart_goal.M.GetRPY()
# x, y, z, w = cart_goal.M.GetQuaternion()
# rospy.loginfo(x)
# rospy.loginfo("roll angle: " + str(r * 180 / 3.1415926))
# rospy.loginfo("pitch: " + str (p * 180 / 3.1415926))
# rospy.loginfo("Yaw angle: " + str(yaw * 180 / 3.1415926))
# feature_points_right = rospy.wait_for_message(
# "/featurization/right/feature_points", FeaturePoints, timeout=None)
# self.joint
if (self.check_cartesian_error(cart_goal) < self.position_threshold):
rospy.loginfo(
'Position is within position threshold, no goal will be sent.')
else:
# Send goal
self.arm.move(cart_goal.p)
error = self.check_cartesian_error(cart_goal)
rospy.loginfo('Inverse kinematic error in position: ' + str(error))
rospy.loginfo('Cartesian goal complete')
def main(screen):
screen.nodelay(1)
# this sets the increment for our displacement
delta = 0.001
total_translation = 0.0
translation = PyKDL.Vector(0.0,0.0,delta)
'''define the waypoint positions for the PSMs for this load test'''
cart1 = PyKDL.Vector(0.116,-0.090,-0.083)
rot1 = PyKDL.Rotation()
rot1 = rot1.Quaternion(0.694,0.0113,0.719,-0.005)
pos1 = PyKDL.Frame(rot1,cart1)
p2 = dvrk.psm('PSM2')
c = dvrk.console()
# set our rate to 30hz
rate = rospy.Rate(30)
print 'homing to position...'
c.teleop_stop()
#p2.open_jaw()
#p2.move(pos1)
p2.close_jaw()
while True:
if screen.getch() == ord('w'):
p2.dmove(translation)
total_translation = total_translation + delta
if screen.getch() == ord('d'):
print 'displacement is: '
print total_translation
if screen.getch() == ord('q'):
print 'quitting'
break
c.teleop_start()
def test_transform(self):
b = tf2_ros.Buffer()
t = TransformStamped()
t.transform.translation.x = 1.0
t.transform.rotation = Quaternion(w=0, x=1, y=0, z=0)
t.header.stamp = builtin_interfaces.msg.Time(sec=2)
t.header.frame_id = 'a'
t.child_frame_id = 'b'
b.set_transform(t, 'eitan_rocks')
out = b.lookup_transform('a','b', rclpy.time.Time(seconds=2), rclpy.time.Duration(seconds=2))
self.assertEqual(out.transform.translation.x, 1)
self.assertEqual(out.transform.rotation.x, 1)
self.assertEqual(out.header.frame_id, 'a')
self.assertEqual(out.child_frame_id, 'b')
v = PyKDL.Vector(1,2,3)
out = b.transform(tf2_ros.Stamped(v, builtin_interfaces.msg.Time(sec=2), 'a'), 'b')
self.assertEqual(out.x(), 0)
self.assertEqual(out.y(), -2)
self.assertEqual(out.z(), -3)
f = PyKDL.Frame(PyKDL.Rotation.RPY(1,2,3), PyKDL.Vector(1,2,3))
out = b.transform(tf2_ros.Stamped(f, builtin_interfaces.msg.Time(sec=2), 'a'), 'b')
self.assertEqual(out.p.x(), 0)
self.assertEqual(out.p.y(), -2)
self.assertEqual(out.p.z(), -3)
# TODO(tfoote) check values of rotation
t = PyKDL.Twist(PyKDL.Vector(1,2,3), PyKDL.Vector(4,5,6))
out = b.transform(tf2_ros.Stamped(t, builtin_interfaces.msg.Time(sec=2), 'a'), 'b')
self.assertEqual(out.vel.x(), 1)
self.assertEqual(out.vel.y(), -8)
self.assertEqual(out.vel.z(), 2)
self.assertEqual(out.rot.x(), 4)
self.assertEqual(out.rot.y(), -5)
self.assertEqual(out.rot.z(), -6)
w = PyKDL.Wrench(PyKDL.Vector(1,2,3), PyKDL.Vector(4,5,6))
out = b.transform(tf2_ros.Stamped(w, builtin_interfaces.msg.Time(sec=2), 'a'), 'b')
self.assertEqual(out.force.x(), 1)
self.assertEqual(out.force.y(), -2)
self.assertEqual(out.force.z(), -3)
self.assertEqual(out.torque.x(), 4)
self.assertEqual(out.torque.y(), -8)
self.assertEqual(out.torque.z(), -4)
def move_tip(self, x=0., y=0., z=0., roll=0., pitch=0., yaw=0.):
"""
Moves the tooltip in the world frame by the given x,y,z / roll,pitch,yaw.
@return True on success
"""
transform = PyKDL.Frame(PyKDL.Rotation.RPY(pitch, roll, yaw),
PyKDL.Vector(-x, -y, -z))
tip_pose = self.get_tip_pose()
tip_pose_kdl = posemath.fromMsg(tip_pose)
final_pose = toMsg(tip_pose_kdl * transform)
self.arm_commander.set_start_state_to_current_state()
self.arm_commander.set_pose_targets([final_pose])
plan = self.arm_commander.plan()
if not self.arm_commander.execute(plan):
return False
return True
def calcNextSquarePoint(): """ Wyznacza nastepny punkt ruchu po kwadracie na podstawie aktualnej pozycji cuRoPo Returns ------- Position() """ vecRo = PyKDL.Vector(cuRoPo.x, cuRoPo.y, 0) twiRo = PyKDL.Rotation.RPY(0, 0, cuRoPo.theta) mxJednoRo = PyKDL.Frame(twiRo, vecRo) vecDestRel = PyKDL.Vector(0, (lefty*2-1)*setRoPo.s, 0) # kwadrat w lewo gdy lewo==True vecDest = mxJednoRo * vecDestRel nextSqPnt = Position(vecDest[0], vecDest[1], 0) print "nextSqPnt.x:", nextSqPnt.x, " nextSqPnt.y:", nextSqPnt.y return nextSqPnt
def query_plan(self):
#to disable the interpolator
#return(self.dst_pose)
for time, pose in self.pose_vector:
if time > rospy.Time.now():
#Found the current setpoint
#message = "time " + str(time)
#rospy.logwarn(message)
self.last_dst_pose = kdl.Frame(pose) #save as last pose
#print "Found frame:"
#print pose
return (pose)
#If we get here, found no unreached setpoint, so just return the last goal frame
#rospy.loginfo("returning dst pose")
#return(self.last_dst_pose)
return (None) #None marks end of the interpolation
def Pos(self, t):
if self.loop is True:
_lambda = t / self.duration
while _lambda > 2.0:
_lambda /= 2.0
if _lambda > 1.0:
_lambda = 2.0 - _lambda
else:
_lambda = np.min((t / self.duration, 1.0))
d = kdl.Frame()
d.p = (1-_lambda)*self.initial_pose.p + _lambda*self.desired_pose.p
R = self.initial_pose.M.Inverse()*self.desired_pose.M
#v = R.GetRot()
(alpha,v) = R.GetRotAngle()
dR = kdl.Rotation.Rot(v,_lambda*alpha)
d.M = self.initial_pose.M * dR
return d
def test_inverse_frame(self, x, y, z, q):
f = quaternion_matrix(q)
f[0, 3] = x
f[1, 3] = y
f[2, 3] = z
r2 = PyKDL.Frame()
r2.M = PyKDL.Rotation.Quaternion(q[0], q[1], q[2], q[3])
r2.p[0] = x
r2.p[1] = y
r2.p[2] = z
r2 = r2.Inverse()
r2 = pykdl_frame_to_numpy(r2)
self.assertTrue(
np.isclose(w.compile_and_execute(w.inverse_frame, [f]),
r2,
atol=1.e-4,
rtol=1.e-4).all())
def main():
filename = None
if (sys.argv > 1):
filename = 'uthai_description/urdf/uthai.urdf'
(ok, tree) = kdl_parser_py.urdf.treeFromFile(filename)
chain = tree.getChain("base_footprint","r_foot_ft_link")
fksolver = kdl.ChainFkSolverPos_recursive(chain)
ikvelsolver = kdl.ChainIkSolverVel_pinv(chain)
iksolver = kdl.ChainIkSolverPos_NR(chain,fksolver,ikvelsolver)
q_init = kdl.JntArray(6)
q = kdl.JntArray(6)
F_dest = kdl.Frame(kdl.Rotation.RPY(0,0,0),kdl.Vector(0.0,0,0))
status = iksolver.CartToJnt(q_init,F_dest,q)
print("Status : ",status)
print(q)
def create_frame_from_points(p0, p1):
# type: (kdl.Vector, kdl.Vector) -> kdl.Frame
"""
Creates a frame from two points. The origin of the frame is the first point. The x-direction points into the
direction of the next point
:param p0: Origin of the frame
:type p0: kdl.Vector
:param p1: x-direction of the frame will point to this vector
:type p1: kdl.Vector
:return: Created frame
:rtype: kdl.Frame
"""
unit_x = p1 - p0 # difference
unit_x.Normalize() # normalize it so that Norm is 1.0
unit_y = kdl.Rotation.RPY(0.0, 0.0, 0.5 * math.pi) * unit_x
unit_z = unit_x * unit_y # cross-product
rotation = kdl.Rotation(unit_x, unit_y, unit_z)
return kdl.Frame(rotation, p0)
def test_initialize(self):
# initialize is run in setUp, but robot.base.get_location has been replaced, so running it again
self.robot.base.get_location = lambda: FrameStamped(
kdl.Frame(kdl.Rotation().Identity(), kdl.Vector(3.5, 3.5, 0)),
"/map")
self.tour_guide.initialize()
self.assertListEqual(self.tour_guide._passed_room_ids,
[self._kitchen.id])
self.assertListEqual(self.tour_guide._passed_furniture_ids,
[self._cabinet.id])
self.assertListEqual(sorted(self.tour_guide._furniture_entities),
sorted([self._cabinet, self._bookcase]))
self.assertListEqual(sorted(self.tour_guide._room_entities),
sorted([self._kitchen, self._bedroom]))
self.assertDictEqual(self.tour_guide._furniture_entities_room, {
self._kitchen: [self._cabinet],
self._bedroom: [self._bookcase]
})
def getImagePoints(self,
options=VirtualObjectOptions(),
camera_frame=PyKDL.Frame(),
camera=None):
if camera is None:
return []
obj_points = self.getObjectPoints(camera_frame=camera_frame,
options=options)
object_to_camera = camera_frame.Inverse() * self
cRvec, cTvec = transformations.KDLToCv(object_to_camera)
img_points, _ = cv2.projectPoints(
obj_points, cRvec, cTvec, np.array(camera.camera_matrix),
np.array(camera.distortion_coefficients))
points = []
for i in range(0, len(img_points)):
points.append(
(int(img_points.item(i, 0, 0)), int(img_points.item(i, 0, 1))))
return points
def createReleaseMarker(self):
marker = InteractiveMarker()
marker.header.frame_id = self._frameID
marker.name = self._releaseMarkerName
# marker.scale = self._torusMeshScalar
marker.scale = 0.9
wTc = getFrameFromPose(self._LargeWheelMarker.pose)
# put orientation of
### need to rotate this in z
cV1 = kdl.Vector(0.0, 0.0, 0.0)
cR1 = kdl.Rotation.RPY(0, 0, self._turnRotation)
frame = wTc * kdl.Frame(cR1, cV1)
marker.pose = getPoseFromFrame(frame)
marker.controls.append(CreateTransRotControl("TranslateX"))
self.addInteractiveMarker(marker, self.releaseCallback)
self.server.applyChanges()
return marker
def calc_R(xa):
ret = []
t = PyKDL.Frame(PyKDL.Rotation.Rot(axis, xa))
for i in range(0, len(l2)):
pos2rot_list[i] = t * pos2_list[i]
n2rot_list[i] = t * n2_list[i]
for i in range(0, len(l1)):
score = getScore(pos1_list[i], pos2rot_list[i], n1_list[i],
n2rot_list[i])
ret.append(score)
# for i in range(0, len(l2)):
# score = getMinScore(pos2rot_list[i], pos1_list, n2rot_list[i], n1_list)
# ret.append(score)
return np.array(ret)
def pose_msg_to_kdl_frame(pose):
"""
Convert a geometry_msgs.msg.Pose message to a PyKDL.Frame object
:param pose: Pose to be converted
:type pose: geometry_msgs.msg.Pose
:rtype: PyKDL.Frame
>>> pose = gm.Pose(gm.Point(1, 2, 3), gm.Quaternion(1, 0, 0, 0))
>>> frame = pose_msg_to_kdl_frame(pose)
>>> frame.p
[ 1, 2, 3]
>>> frame.M.GetQuaternion()
(1.0, 0.0, 0.0, 0.0)
"""
rot = kdl.Rotation.Quaternion(pose.orientation.x, pose.orientation.y,
pose.orientation.z, pose.orientation.w)
trans = kdl.Vector(pose.position.x, pose.position.y, pose.position.z)
return kdl.Frame(rot, trans)
def get_flange_pose(self, q):
"""Returns the flange pose for a given joint configuration.
Arguments:
q -- joint configuration
"""
joint_arr = kdl.JntArray(self._num_of_joints)
for joint_num in range(self._num_of_joints):
joint_arr[joint_num] = q[joint_num]
frame = kdl.Frame()
if self._tool_segment is None:
self._fk_solver_pos.JntToCart(
joint_arr, frame, self._complete_chain.getNrOfSegments())
else:
self._fk_solver_pos.JntToCart(
joint_arr, frame,
self._complete_chain.getNrOfSegments() - 1)
return kdl_frame_to_m3d_transform(frame)
def kdl_inverse_kinematics(self, pos, quat, seed=None):
pos = PyKDL.Vector(pos[0], pos[1], pos[2])
rot = PyKDL.Rotation()
rot = rot.Quaternion(quat[0], quat[1], quat[2], quat[3])
goal_pose = PyKDL.Frame(rot, pos)
seed_array = joint_list_to_kdl(self._default_seed)
if seed != None:
seed_array = joint_list_to_kdl(seed)
result_angles = PyKDL.JntArray(self._num_jnts)
if self._ik_p_kdl.CartToJnt(seed_array, goal_pose, result_angles) >= 0:
result = np.array(list(result_angles))
# return result
return True
else:
# return None
return False
def get_obstacle_pose(
cap_front,
cap_rear,
obs_front,
obs_rear,
obs_gps_to_centroid,
velodyne_to_front,
cap_yaw_error_rad=0,
cap_pitch_error_rad=0):
# calculate capture yaw in ENU frame and setup correction rotation
cap_front_v = dict_to_vect(cap_front)
cap_rear_v = dict_to_vect(cap_rear)
cap_yaw = get_yaw(cap_front_v, cap_rear_v)
cap_yaw += cap_yaw_error_rad
rot_cap = kd.Rotation.EulerZYX(-cap_yaw, -cap_pitch_error_rad, 0)
obs_rear_v = dict_to_vect(obs_rear)
if obs_front:
obs_front_v = dict_to_vect(obs_front)
obs_yaw = get_yaw(obs_front_v, obs_rear_v)
# use the front gps as the obstacle reference point if it exists as it's closers
# to the centroid and mounting metadata seems more reliable
cap_to_obs = obs_front_v - cap_front_v
else:
cap_to_obs = obs_rear_v - cap_front_v
# transform capture car to obstacle vector into capture car velodyne lidar frame
res = rot_cap * cap_to_obs
res += list_to_vect(velodyne_to_front)
# obs_gps_to_centroid is offset for front gps if it exists, otherwise rear
obs_gps_to_centroid_v = list_to_vect(obs_gps_to_centroid)
if obs_front:
# if we have both front + rear RTK calculate an obstacle yaw and use it for centroid offset
obs_rot_z = kd.Rotation.RotZ(obs_yaw - cap_yaw)
centroid_offset = obs_rot_z * obs_gps_to_centroid_v
else:
# if no obstacle yaw calculation possible, treat rear RTK as centroid and offset in Z only
obs_rot_z = kd.Rotation()
centroid_offset = kd.Vector(0, 0, obs_gps_to_centroid_v[2])
res += centroid_offset
return frame_to_dict(kd.Frame(obs_rot_z, res))
def read_data(bag, arm):
'''
Returns tuple (time, theta, theta_ref, angular_vel, angular_vel_ref,
angular_acc, angular_acc_ref, s, gripper_pos_command, gripper_vel_command, gripper_pos)
'''
global alpha
time = np.array([])
frame = PyKDL.Frame(PyKDL.Rotation.RPY(0.0, 0.0, 1.22),
PyKDL.Vector(0.0, 0.0, 0.0))
force_x = np.array([])
force_x_t = np.array([])
force_y = np.array([])
force_y_t = np.array([])
force_z = np.array([])
torque_x = np.array([])
torque_x_t = np.array([])
torque_y = np.array([])
torque_y_t = np.array([])
torque_z = np.array([])
for topic, msg, t in bag.read_messages(
topics=['/ft/' + arm + '_gripper_motor']):
time = np.append(time, msg.header.stamp.to_sec())
force_x = np.append(force_x, msg.wrench.force.x)
force_y = np.append(force_y, msg.wrench.force.y)
#aligned_Fx = msg.wrench.force.x*math.cos(alpha) - msg.wrench.force.y*math.sin(alpha)
#aligned_Fy = msg.wrench.force.x*math.sin(alpha) + msg.wrench.force.y*math.cos(alpha)
#force_x_t = np.append(force_x_t, aligned_Fx)
#force_y_t = np.append(force_y_t, aligned_Fy)
#force_z = np.append(force_z, msg.wrench.force.z)
## torque_x = np.append(torque_x, msg.wrench.torque.x)
## torque_y = np.append(torque_y, msg.wrench.torque.y)
## aligned_Tx = msg.wrench.torque.y*math.sin(alpha) + msg.wrench.torque.x*math.cos(alpha)
## aligned_Ty = msg.wrench.torque.y*math.cos(alpha) - msg.wrench.torque.x*math.sin(alpha)
## torque_x_t = np.append(torque_x_t, aligned_Tx)
## torque_y_t = np.append(torque_y_t, aligned_Ty)
#torque_z = np.append(torque_z, msg.wrench.torque.z)
#return time, force_x, force_y, force_z, torque_x, torque_y, torque_z
return time, force_x, force_y, #force_x_t, force_y_t, torque_x, torque_y, torque_x_t, torque_y_t
def get_completion(partial_np_pc, transform):
goal = graspit_shape_completion.msg.CompleteMeshGoal()
assert partial_np_pc.shape[0] > 3
assert partial_np_pc.shape[1] == 3
for i in range(partial_np_pc.shape[0]):
point = partial_np_pc[i, :]
goal.partial_mesh.vertices.append(geometry_msgs.msg.Point(*point))
client = actionlib.SimpleActionClient('complete_mesh', graspit_shape_completion.msg.CompleteMeshAction)
client.wait_for_server()
client.send_goal(goal)
client.wait_for_result()
result = client.get_result()
data = np.ones((len(result.completed_mesh.vertices), 4))
for i, point in enumerate(result.completed_mesh.vertices):
x = point.x
y = point.y
z = point.z
data[i] = np.array((x, y, z, 1))
data_of = data[:]
trans_frame = PyKDL.Frame(PyKDL.Rotation.RPY(0, 0, 0),
PyKDL.Vector(0, 0, -1))
trans_matrix = tf_conversions.posemath.toMatrix(trans_frame)
data = np.dot(trans_matrix, data.T).T
data_of = np.dot(transform, data_of.T).T
data = data[:, 0:3]
data_of = data_of[:, 0:3]
completed_pcd_cf = pcl.PointCloud(np.array(data, np.float32))
completed_pcd_of = pcl.PointCloud(np.array(data_of, np.float32))
vg = np.array(result.voxel_grid).reshape((PATCH_SIZE, PATCH_SIZE, PATCH_SIZE))
vox = binvox_rw.Voxels(vg,
(PATCH_SIZE, PATCH_SIZE, PATCH_SIZE),
(result.voxel_offset_x, result.voxel_offset_y, result.voxel_offset_z -1 ),
result.voxel_resolution * PATCH_SIZE,
"xyz")
return completed_pcd_cf, completed_pcd_of, vox