def __init__(self, eef_id, world_id, rate=200):
self.eef_previous_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.world_previous_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.eef_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.world_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.lock = RLock()
self.thread = None
self.rate = rate
# Setting up the connection with Matlab
self.bridge = PythonInterface()
# Setting up the connection with Optitrack
print("[Matlab-Optitrack] Setting up the connection...")
self.client = NatNetClient()
print("[Matlab-Optitrack] Attempt to receive a single frame...")
self.client.receive_frame().unpack_data() # Just check once that we receive data from optitrack/NatNet
print("[Matlab-Optitrack] server connected and ready to handle requests!")
class MatlabOptitrackServer(object):
def __init__(self, eef_id, world_id, rate=200):
self.eef_previous_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.world_previous_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.eef_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.world_pose = [[0, 0, 0], [0, 0, 0, 0]]
self.lock = RLock()
self.thread = None
self.rate = rate
# Setting up the connection with Matlab
self.bridge = PythonInterface()
# Setting up the connection with Optitrack
print("[Matlab-Optitrack] Setting up the connection...")
self.client = NatNetClient()
print("[Matlab-Optitrack] Attempt to receive a single frame...")
self.client.receive_frame().unpack_data() # Just check once that we receive data from optitrack/NatNet
print("[Matlab-Optitrack] server connected and ready to handle requests!")
def _threaded_update(self):
while True:
data = self.client.receive_frame().unpack_data()
with self.lock:
self.eef_previous_pose = self.eef_pose
self.world_previous_pose = self.world_pose
self.eef_pose = self.get_pose(eef_id, data)
self.world_pose = self.get_pose(world_id, data)
# No sleep needed, data availability is blocking
@staticmethod
def get_pose(id, data):
"""
Returns the pose of Rigid body id from data, None if not found
"""
for rb in data['rb']:
if rb['id'] == id:
return rb['position'], rb['orientation']
return None
def is_world_visible(self):
return not (allclose(self.world_previous_pose[0], self.world_pose[0]) and\
allclose(self.world_previous_pose[1], self.world_pose[1]))
def is_eef_visible(self):
return not (allclose(self.eef_previous_pose[0], self.eef_pose[0]) and\
allclose(self.eef_previous_pose[1], self.eef_pose[1]))
def start(self):
self.thread = Thread(target=self._threaded_update)
self.thread.setDaemon(True)
self.thread.start()
while True:
self.bridge.read()
print("[Matlab-Optitrack] Received request for object {} with respect to {}".format(eef_id, world_id))
relative_pose_eef = [[0, 0, 0], [0, 0, 0, 0]]
with self.lock:
if self.eef_pose is None or self.world_pose is None:
print("[Matlab-Optitrack] ERROR End effector is {}, World is {}, sending a vector of zeros".format('unknown' if self.eef_pose is None else 'known',
'unknown' if self.world_pose is None else 'known'))
elif not self.is_eef_visible() or not self.is_world_visible():
print("[Matlab-Optitrack] Objects are known but not visible, sending a vector of zeros")
else:
relative_pose_eef = multiply_transform(inverse_transform(self.world_pose), self.eef_pose)
print("[Matlab-Optitrack] Sending relative pose {}".format(str(relative_pose_eef)))
self.bridge.send(relative_pose_eef)