def __init__(self, donkey_name, mqtt_broker, sensor_size=(120, 160, 3)):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % donkey_name,
broker=mqtt_broker)
self.controller_pub = MQTTValuePub("donkey/%s/controls" % donkey_name,
broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
self.sensor_size = sensor_size
class DonkeyRemoteContoller:
def __init__(self, donkey_name, mqtt_broker, sensor_size=(120, 160, 3)):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % donkey_name, broker=mqtt_broker)#, def_value=(np.zeros((40, 40)), {"cte": 0}))
self.controller_pub = MQTTValuePub("donkey/%s/controls" % donkey_name, broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
self.sensor_size = sensor_size
def get_sensor_size(self):
return self.sensor_size
def wait_until_connected(self):
pass
def take_action(self, action):
self.controller_pub.run(action)
def quit(self):
self.camera_sub.shutdown()
self.controller_pub.shutdown()
def get_original_image(self):
return self.img
def observe(self):
jpg = self.camera_sub.run()
#data = self.camera_sub.run()
# #print("State: {}".format(state))
# #jpg, info = state
self.img = self.jpgToImg.run(jpg)
# return self.img#, info
return self.img
class DonkeyRemoteContoller:
def __init__(self, donkey_name, mqtt_broker, sensor_size=(120, 160, 3)):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % donkey_name,
broker=mqtt_broker)
self.controller_pub = MQTTValuePub("donkey/%s/controls" % donkey_name,
broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
self.sensor_size = sensor_size
def get_sensor_size(self):
return self.sensor_size
def wait_until_connected(self):
pass
def take_action(self, action):
self.controller_pub.run(action)
def quit(self):
self.camera_sub.shutdown()
self.controller_pub.shutdown()
def get_original_image(self):
return self.img
def observe(self):
jpg = self.camera_sub.run()
self.img = self.jpgToImg.run(jpg)
return self.img
def __init__(self, car="kari", mqtt_broker="mqtt.eclipse.org"):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % car, broker=mqtt_broker)
self.state_sub = MQTTValueSub("donkey/%s/state" % car, broker=mqtt_broker)
self.controller_pub = MQTTValuePub("donkey/%s/controls" % car, broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
self.img = np.zeros((40, 40))
self.state = None
self.speed = 0
def __init__(self,
car_name="Kari",
mqtt_broker="mqtt.eclipse.org",
realsense=False,
env_type="DonkeyCar"):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % car_name,
broker=mqtt_broker)
if realsense:
self.state_sub = MQTTValueSub("donkey/%s/state" % car_name,
broker=mqtt_broker)
self.controller_pub = MQTTValuePub("donkey/%s/controls" % car_name,
broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
self.img = np.zeros((40, 40))
self.state = None
self.speed = 0
self.realsense = realsense
self.sim = env_type != "DonkeyCar"
def __init__(self, alg_type, sim, car_name=args.car_name):
self.args = define_config()
self.agent = Dreamer(self.args)
self.sim = sim
self.image = np.zeros((120, 160, 3))
self.observation = torch.zeros(
(1, 3, 64, 64)) # init observation, with batch dim
self.belief = torch.zeros(1,
self.args.belief_size,
device=self.args.device)
self.posterior_state = torch.zeros(1,
self.args.state_size,
device=self.args.device)
self.action = torch.zeros(1,
self.args.action_size,
device=self.args.device)
# self.act_history = torch.zeros(1, self.args.action_size*3, device=self.args.device)
self.speed = 0
self.step = 0
self.episode = 0
self.episode_reward = 0
self.replay_buffer = []
self.target_speed = 0
self.steering = 0
self.training = False
self.step_start = 0
self.buffers_sent = False
self.replay_buffer_pub = MQTTValuePub(car_name + "buffer",
broker="mqtt.eclipse.org")
self.replay_buffer_sub = MQTTValueSub(car_name + "buffer",
broker="mqtt.eclipse.org",
def_value=(0, True))
self.replay_buffer_received_pub = MQTTValuePub(
car_name + "buffer_received", broker="mqtt.eclipse.org")
self.replay_buffer_received_sub = MQTTValueSub(
car_name + "buffer_received",
broker="mqtt.eclipse.org",
def_value=0)
self.param_pub = MQTTValuePub(car_name + "param",
broker="mqtt.eclipse.org")
self.param_sub = MQTTValueSub(car_name + "param",
broker="mqtt.eclipse.org")
from donkeycar.parts.network import MQTTValuePub, MQTTValueSub
from donkeycar.parts.transform import Lambda
from donkeycar.parts.image import JpgToImgArr
V = dk.vehicle.Vehicle()
args = docopt(__doc__)
print(args)
V.add(MQTTValueSub(name="donkey/%s/camera" % args["--name"], broker=args["--broker"]), outputs=["jpg"])
V.add(JpgToImgArr(), inputs=["jpg"], outputs=["img_arr"])
V.add(ImgBGR2RGB(), inputs=["img_arr"], outputs=["rgb"])
V.add(ImageScale(4.0), inputs=["rgb"], outputs=["lg_img"])
V.add(CvImageView(), inputs=["lg_img"])
V.add(ArrowKeyboardControls(), outputs=["control"])
V.add(MQTTValuePub(name="donkey/%s/controls" % args["--name"]), inputs=["control"])
record_path = args["--record"]
if record_path is not None:
class ImageSaver:
def __init__(self, path):
self.index = 0
self.path = path
def run(self, img_arr):
if img_arr is None:
return
dest_path = os.path.join(self.path, "img_%d.jpg" % self.index)
self.index += 1
cv2.imwrite(dest_path, img_arr)
from donkeycar.parts.dgym import DonkeyGymEnv
if cfg.DONKEY_GYM:
from donkeycar.parts.dgym import DonkeyGymEnv
cam = DonkeyGymEnv(cfg.DONKEY_SIM_PATH, env_name=cfg.DONKEY_GYM_ENV_NAME)
threaded = True
inputs = ['angle', 'throttle']
V.add(cam, inputs=inputs, outputs=['camera/arr'], threaded=threaded)
#V.add(cam, outputs=["camera/arr"], threaded=True)
img_to_jpg = ImgArrToJpg()
V.add(img_to_jpg, inputs=["camera/arr"], outputs=["camera/jpg"])
pub_cam = MQTTValuePub("donkey/%s/camera" % cfg.DONKEY_UNIQUE_NAME,
broker=cfg.MQTT_BROKER)
V.add(pub_cam, inputs=["camera/jpg"])
sub_controls = MQTTValueSub("donkey/%s/controls" % cfg.DONKEY_UNIQUE_NAME,
def_value=(0., 0.),
broker=cfg.MQTT_BROKER)
V.add(sub_controls, outputs=["angle", "throttle"])
# steering_controller = PCA9685(cfg.STEERING_CHANNEL, cfg.PCA9685_I2C_ADDR, busnum=cfg.PCA9685_I2C_BUSNUM)
# steering = PWMSteering(controller=steering_controller,
# left_pulse=cfg.STEERING_LEFT_PWM,
# right_pulse=cfg.STEERING_RIGHT_PWM)
# throttle_controller = PCA9685(cfg.THROTTLE_CHANNEL, cfg.PCA9685_I2C_ADDR, busnum=cfg.PCA9685_I2C_BUSNUM)
# throttle = PWMThrottle(controller=throttle_controller,
# max_pulse=cfg.THROTTLE_FORWARD_PWM,
class DonkeyCarSpeed:
def __init__(self, car="kari", mqtt_broker="mqtt.eclipse.org"):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % car, broker=mqtt_broker)
self.state_sub = MQTTValueSub("donkey/%s/state" % car, broker=mqtt_broker)
self.controller_pub = MQTTValuePub("donkey/%s/controls" % car, broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
self.img = np.zeros((40, 40))
self.state = None
self.speed = 0
def observe(self):
self.img = self.jpgToImg.run(self.camera_sub.run())
self.state = self.state_sub.run()
def reset(self):
self.controller_pub.run([0, 0])
self.observe()
time.sleep(1)
return self.img
def step(self, control, step_length):
self.controller_pub.run(control)
time.sleep(step_length)
self.observe()
v = self.state["v"]
self.speed = (v[0]**2 + v[1]**2 + v[2]**2)**0.5
done = self.is_dead()
return self.img, done
def is_dead(self):
crop_height = 20
crop_width = 20
threshold = 70
pixels_percentage = 0.10
pixels_required = (self.img.shape[1] - 2 * crop_width) * crop_height * pixels_percentage
#(im[:,:,0] > threshold) & (im[:,:,1] < 150) & (im[:,:,1] < 150)
crop = self.img[-crop_height:, crop_width:-crop_width]
#gs = np.dot(crop, [0.299, 0.587, 0.114])
r = crop[:,:,0] < threshold
g = crop[:,:,1] < threshold
b = crop[:,:,2] < threshold
pixels = (r & g & b).sum()
#im = self.state[-crop_height:, crop_width:-crop_width]
#gs = (im[:,:,0] > 150) & (im[:,:,1] < 150) & (im[:,:,1] < 150)
#pixels = len(gs[gs])
#pixels = len(gs[gs < threshold])
print("Pixels: {}, Required: {}".format(pixels, pixels_required))
return pixels < pixels_required
def __init__(self, donkey_name, mqtt_broker):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % donkey_name,
broker=mqtt_broker)
self.controller_pub = MQTTValuePub("donkey/%s/controls" % donkey_name,
broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
class RL_Agent():
def __init__(self, alg_type, sim, car_name=args.car_name):
self.args = define_config()
self.agent = Dreamer(self.args)
self.sim = sim
self.image = np.zeros((120, 160, 3))
self.observation = torch.zeros(
(1, 3, 64, 64)) # init observation, with batch dim
self.belief = torch.zeros(1,
self.args.belief_size,
device=self.args.device)
self.posterior_state = torch.zeros(1,
self.args.state_size,
device=self.args.device)
self.action = torch.zeros(1,
self.args.action_size,
device=self.args.device)
# self.act_history = torch.zeros(1, self.args.action_size*3, device=self.args.device)
self.speed = 0
self.step = 0
self.episode = 0
self.episode_reward = 0
self.replay_buffer = []
self.target_speed = 0
self.steering = 0
self.training = False
self.step_start = 0
self.buffers_sent = False
self.replay_buffer_pub = MQTTValuePub(car_name + "buffer",
broker="mqtt.eclipse.org")
self.replay_buffer_sub = MQTTValueSub(car_name + "buffer",
broker="mqtt.eclipse.org",
def_value=(0, True))
self.replay_buffer_received_pub = MQTTValuePub(
car_name + "buffer_received", broker="mqtt.eclipse.org")
self.replay_buffer_received_sub = MQTTValueSub(
car_name + "buffer_received",
broker="mqtt.eclipse.org",
def_value=0)
self.param_pub = MQTTValuePub(car_name + "param",
broker="mqtt.eclipse.org")
self.param_sub = MQTTValueSub(car_name + "param",
broker="mqtt.eclipse.org")
def reset(self, image):
self.episode += 1
self.episode_reward = 0
self.replay_buffer = []
self.target_speed = 0
self.steering = 0
# self.command_history = np.zeros(3*COMMAND_HISTORY_LENGTH)
# self.state = np.vstack([image for x in range(FRAME_STACK)])
self.belief = torch.zeros(1,
self.args.belief_size,
device=self.args.device)
self.posterior_state = torch.zeros(1,
self.args.state_size,
device=self.args.device)
self.action = torch.zeros(1,
self.args.action_size,
device=self.args.device)
# self.act_history = torch.zeros(1, self.args.action_size*3, device=self.args.device)
self.buffer_sent = False
self.buffer_received = False
self.params_sent = False
self.params_received = False
def train(self):
#print(f"Training for {int(time.time() - self.training_start)} seconds")
if (time.time() - self.training_start) > TRAINING_TIMEOUT:
"""Temporary fix for when sometimes the replay buffer fails to send"""
self.training_start = time.time()
self.buffers_sent = 0
self.replay_buffer_pub.run((0, False))
return False
if len(self.replay_buffer) > 0:
buffers_received = self.replay_buffer_received_sub.run()
if self.buffers_sent == buffers_received:
self.buffers_sent += 1
self.replay_buffer_pub.run(
(self.buffers_sent, self.replay_buffer[:BLOCK_SIZE]))
print(
f"Sent {len(self.replay_buffer[:BLOCK_SIZE])} observations"
)
self.replay_buffer = self.replay_buffer[BLOCK_SIZE:]
return True
if self.replay_buffer_received_sub.run() == self.buffers_sent:
self.buffers_sent = 0
self.replay_buffer_received_pub.run(0)
self.replay_buffer_pub.run((0, False))
new_params = self.param_sub.run()
if not new_params:
return True
print("Received new params.")
self.agent.import_parameters(new_params)
self.param_pub.run(False)
return False
def run(self, image, speed=None):
if not speed:
self.speed = self.target_speed
else:
self.speed = speed
if image is not None:
self.image = image
self.dead = self.is_dead(
self.image) if not self.sim else self.is_dead_sim(self.image)
if self.step > 0 and not self.training:
"""Save observation to replay buffer"""
reward = 1 + (self.speed - self.args.throttle_min) / (
self.args.throttle_max - self.args.throttle_min)
# reward = min(reward, 2) / 2
# reward = self.speed + 1
done = self.dead
reward = reward * -10 if self.dead else reward
# reward = -self.speed - 10 if self.dead else reward
# cv2.imwrite("./obs/img_{t}.png".format(t=self.step), self.image)
next_observation = self.agent.process_im(self.image)
# self.replay_buffer.append((self.observation,
# self.action.cpu(),
# reward,
# done))
self.replay_buffer.append(
(next_observation, self.action.cpu(), reward, done))
# next_command_history = np.roll(self.command_history, 3)
# next_command_history[:3] = [self.steering, self.target_speed, self.speed]
# next_state = np.roll(self.state, 1)
# next_state[:1, :, :] = self.agent.process_im(self.image, IMAGE_SIZE, RGB)
# self.replay_buffer.append([ [self.state, self.command_history],
# [self.steering, self.target_speed],
# [reward],
# [next_state, next_command_history],
# [float(not done)]])
self.episode_reward += reward
step_end = time.time()
self.observation = next_observation # obs is a tensor(3, 64, 64), img is a numpy (120, 180, 3)
print(
f"Episode: {self.episode}, Step: {self.step}, Reward: {reward:.2f}, Episode reward: {self.episode_reward:.2f}, Step time: {(self.step_start - step_end):.2f}, Speed: {self.speed:.2f}, Steering, {self.steering:.2f}"
)
# self.state = next_state
# self.command_history = next_command_history
# print(f"Episode: {self.episode}, Step: {self.step}, Reward: {reward:.2f}, Episode reward: {self.episode_reward:.2f}, Step time: {(self.step_start - step_end):.2f}, Speed: {self.speed:.2f}")
if self.step > self.args.max_episodes_steps or (self.dead
and not self.training):
self.training_start = time.time()
self.step = 0
self.steering = 0
self.target_speed = 0
self.training = True
self.replay_buffer = self.replay_buffer[self.args.
skip_initial_steps:]
return self.steering, self.target_speed, self.training
if self.training:
self.training = self.train()
self.dead = False
return self.steering, self.target_speed, self.training
if self.step == 0:
if not self.sim:
input("Press Enter to start a new episode.")
self.reset(self.agent.process_im(self.image))
self.step += 1
if self.step < self.args.skip_initial_steps:
return 0.001, 0, False
self.step_start = time.time()
if self.episode <= self.args.random_episodes:
self.steering = np.random.normal(0, 1)
self.target_speed = 0.5
self.action = torch.tensor([[self.steering, self.target_speed]],
device=self.args.device)
else:
with torch.no_grad():
self.belief, self.posterior_state = self.agent.infer_state(
self.observation.to(self.args.device),
action=self.action,
belief=self.belief,
state=self.posterior_state)
self.action = self.agent.select_action(
(self.belief, self.posterior_state))
# print("before limit", self.action)
# maintain act_history
# self.act_history = torch.roll(act_history, -args.action_size, dims=-1)
# self.act_history[:, -args.action_size:] = action
# to get steering and target_speed as numpy
action = self.action.cpu().numpy(
) # act dim : [batch_size, act_size]
# action = self.enforce_limits(action[0], self.steering) # size [act_size]
self.steering, self.target_speed = action[0][0], action[0][1]
# self.action[0] = torch.tensor(action).to(self.action)
# print("after limit ", self.action)
## didn't use enforce_limit yet
# self.steering, self.target_speed = self.enforce_limits(action, self.command_history[0]) # TODO: change this
return self.steering, self.target_speed, self.training
# action = self.agent.select_action((self.state, self.command_history))
# self.steering, self.target_speed = self.enforce_limits(action, self.command_history[0])
# return self.steering, self.target_speed, self.training
def is_dead(self, img):
"""
Counts the black pixels from the ground and compares the amount to a threshold value.
If there are not enough black pixels the car is assumed to be off the track.
"""
crop_height = 20
crop_width = 20
threshold = 70
pixels_percentage = 0.10
pixels_required = (img.shape[1] -
2 * crop_width) * crop_height * pixels_percentage
crop = img[-crop_height:, crop_width:-crop_width]
r = crop[:, :, 0] < threshold
g = crop[:, :, 1] < threshold
b = crop[:, :, 2] < threshold
pixels = (r & g & b).sum()
# print("Pixels: {}, Required: {}".format(pixels, pixels_required))
return pixels < pixels_required
def is_dead_sim(self, img):
crop_height = 40
required = 0.8
cropped = img[-crop_height:]
rgb = cropped[:, :, 0] > cropped[:, :, 2]
return rgb.sum() / (crop_height * 160) > required
def enforce_limits(self, action, prev_steering):
"""
Scale the agent actions to environment limits
"""
var = (self.args.throttle_max - self.args.throttle_min) / 2
mu = (self.args.throttle_max + self.args.throttle_min) / 2
steering_min = max(self.args.steer_limit_left,
prev_steering - self.args.max_steering_diff)
steering_max = min(self.args.steer_limit_right,
prev_steering + self.args.max_steering_diff)
steering = max(steering_min, min(steering_max, action[0]))
return np.array([steering, action[1] * var + mu], dtype=np.float32)
class DonkeyRemoteEnv:
def __init__(self,
car_name="Kari",
mqtt_broker="mqtt.eclipse.org",
realsense=False,
env_type="DonkeyCar"):
self.camera_sub = MQTTValueSub("donkey/%s/camera" % car_name,
broker=mqtt_broker)
if realsense:
self.state_sub = MQTTValueSub("donkey/%s/state" % car_name,
broker=mqtt_broker)
self.controller_pub = MQTTValuePub("donkey/%s/controls" % car_name,
broker=mqtt_broker)
self.jpgToImg = JpgToImgArr()
self.img = np.zeros((40, 40))
self.state = None
self.speed = 0
self.realsense = realsense
self.sim = env_type != "DonkeyCar"
def observe(self):
self.img = self.jpgToImg.run(self.camera_sub.run())
if self.realsense:
self.state = self.state_sub.run()
v = self.state["v"]
self.speed = (v[0]**2 + v[1]**2 + v[2]**2)**0.5
def reset(self):
self.controller_pub.run([0, 0])
self.observe()
time.sleep(2)
return self.img
def step(self, control, step_length):
print(control)
self.controller_pub.run(control)
time.sleep(step_length)
self.observe()
done = self.is_dead_sim() if self.sim else self.is_dead_real()
return self.img, done
def is_dead_real(self):
crop_height = 20
crop_width = 20
threshold = 70
pixels_percentage = 0.10
pixels_required = (self.img.shape[1] -
2 * crop_width) * crop_height * pixels_percentage
crop = self.img[-crop_height:, crop_width:-crop_width]
r = crop[:, :, 0] < threshold
g = crop[:, :, 1] < threshold
b = crop[:, :, 2] < threshold
pixels = (r & g & b).sum()
print("Pixels: {}, Required: {}".format(pixels, pixels_required))
return pixels < pixels_required
def is_dead_sim(self):
crop_height = 40
required = 0.8
cropped = self.img[-crop_height:]
rgb = cropped[:, :, 0] > cropped[:, :, 2]
return rgb.sum() / (crop_height * 160) > required
cfg = dk.load_config()
V = dk.Vehicle()
print("starting up", cfg.DONKEY_UNIQUE_NAME, "for remote management.")
cam = PiCamera(image_w=cfg.IMAGE_W,
image_h=cfg.IMAGE_H,
image_d=cfg.IMAGE_DEPTH)
V.add(cam, outputs=["camera/arr"], threaded=True)
img_to_jpg = ImgArrToJpg()
V.add(img_to_jpg, inputs=["camera/arr"], outputs=["camera/jpg"])
pub_cam = MQTTValuePub("donkey/%s/camera" % cfg.DONKEY_UNIQUE_NAME)
V.add(pub_cam, inputs=["camera/jpg"])
sub_controls = MQTTValueSub("donkey/%s/controls" % cfg.DONKEY_UNIQUE_NAME,
def_value=(0., 0.))
V.add(sub_controls, outputs=["angle", "throttle"])
steering_controller = ServoBlaster(cfg.STEERING_CHANNEL)
#PWM pulse values should be in the range of 100 to 200
assert (cfg.STEERING_LEFT_PWM <= 200)
assert (cfg.STEERING_RIGHT_PWM <= 200)
steering = PWMSteering(controller=steering_controller,
left_pulse=cfg.STEERING_LEFT_PWM,
right_pulse=cfg.STEERING_RIGHT_PWM)
def __init__(self,
alg_type,
sim,
car_name=args.car_name,
encoder_update=args.encoder_update,
max_episode_steps=MAX_EPISODE_STEPS):
if encoder_update == "pixel":
print("Using Pixel encoder")
PARAMS["sac"]["encoder_critic_loss"] = True
PARAMS["sac"]["encoder_ae_loss"] = False
if encoder_update == "ae":
print("Using Autoencoder loss")
PARAMS["sac"]["encoder_critic_loss"] = False
PARAMS["sac"]["encoder_ae_loss"] = True
if encoder_update == "aesac":
print("Using autoencoder and critic loss")
PARAMS["sac"]["encoder_critic_loss"] = True
PARAMS["sac"]["encoder_ae_loss"] = True
self.agent = AE_SAC(PARAMS)
self.sim = sim
self.image = np.zeros((120, 160, 3))
self.command_history = np.zeros(3 * COMMAND_HISTORY_LENGTH)
self.state = np.vstack([
self.agent.process_im(self.image, IMAGE_SIZE, RGB)
for x in range(FRAME_STACK)
])
self.speed = 0
self.step = 0
self.episode = 0
self.episode_reward = 0
self.replay_buffer = []
self.max_episode_steps = max_episode_steps
self.target_speed = 0
self.steering = 0
self.training = False
self.step_start = 0
self.buffers_sent = False
self.replay_buffer_pub = MQTTValuePub(car_name + "buffer",
broker="mqtt.eclipse.org")
self.replay_buffer_sub = MQTTValueSub(car_name + "buffer",
broker="mqtt.eclipse.org",
def_value=(0, True))
self.replay_buffer_received_pub = MQTTValuePub(
car_name + "buffer_received", broker="mqtt.eclipse.org")
self.replay_buffer_received_sub = MQTTValueSub(
car_name + "buffer_received",
broker="mqtt.eclipse.org",
def_value=0)
self.param_pub = MQTTValuePub(car_name + "param",
broker="mqtt.eclipse.org")
self.param_sub = MQTTValueSub(car_name + "param",
broker="mqtt.eclipse.org")
class RL_Agent():
def __init__(self,
alg_type,
sim,
car_name=args.car_name,
encoder_update=args.encoder_update,
max_episode_steps=MAX_EPISODE_STEPS):
if encoder_update == "pixel":
print("Using Pixel encoder")
PARAMS["sac"]["encoder_critic_loss"] = True
PARAMS["sac"]["encoder_ae_loss"] = False
if encoder_update == "ae":
print("Using Autoencoder loss")
PARAMS["sac"]["encoder_critic_loss"] = False
PARAMS["sac"]["encoder_ae_loss"] = True
if encoder_update == "aesac":
print("Using autoencoder and critic loss")
PARAMS["sac"]["encoder_critic_loss"] = True
PARAMS["sac"]["encoder_ae_loss"] = True
self.agent = AE_SAC(PARAMS)
self.sim = sim
self.image = np.zeros((120, 160, 3))
self.command_history = np.zeros(3 * COMMAND_HISTORY_LENGTH)
self.state = np.vstack([
self.agent.process_im(self.image, IMAGE_SIZE, RGB)
for x in range(FRAME_STACK)
])
self.speed = 0
self.step = 0
self.episode = 0
self.episode_reward = 0
self.replay_buffer = []
self.max_episode_steps = max_episode_steps
self.target_speed = 0
self.steering = 0
self.training = False
self.step_start = 0
self.buffers_sent = False
self.replay_buffer_pub = MQTTValuePub(car_name + "buffer",
broker="mqtt.eclipse.org")
self.replay_buffer_sub = MQTTValueSub(car_name + "buffer",
broker="mqtt.eclipse.org",
def_value=(0, True))
self.replay_buffer_received_pub = MQTTValuePub(
car_name + "buffer_received", broker="mqtt.eclipse.org")
self.replay_buffer_received_sub = MQTTValueSub(
car_name + "buffer_received",
broker="mqtt.eclipse.org",
def_value=0)
self.param_pub = MQTTValuePub(car_name + "param",
broker="mqtt.eclipse.org")
self.param_sub = MQTTValueSub(car_name + "param",
broker="mqtt.eclipse.org")
def reset(self, image):
self.episode += 1
self.episode_reward = 0
self.replay_buffer = []
self.target_speed = 0
self.steering = 0
self.command_history = np.zeros(3 * COMMAND_HISTORY_LENGTH)
self.state = np.vstack([image for x in range(FRAME_STACK)])
self.buffer_sent = False
self.buffer_received = False
self.params_sent = False
self.params_received = False
def train(self):
#print(f"Training for {int(time.time() - self.training_start)} seconds")
if (time.time() - self.training_start) > TRAINING_TIMEOUT:
"""Temporary fix for when sometimes the replay buffer fails to send"""
self.training_start = time.time()
self.buffers_sent = 0
self.replay_buffer_pub.run((0, False))
return False
if len(self.replay_buffer) > 0:
buffers_received = self.replay_buffer_received_sub.run()
if self.buffers_sent == buffers_received:
self.buffers_sent += 1
self.replay_buffer_pub.run(
(self.buffers_sent, self.replay_buffer[:BLOCK_SIZE]))
print(
f"Sent {len(self.replay_buffer[:BLOCK_SIZE])} observations"
)
self.replay_buffer = self.replay_buffer[BLOCK_SIZE:]
return True
if self.replay_buffer_received_sub.run() == self.buffers_sent:
self.buffers_sent = 0
self.replay_buffer_received_pub.run(0)
self.replay_buffer_pub.run((0, False))
new_params = self.param_sub.run()
if not new_params:
return True
print("Received new params.")
self.agent.import_parameters(new_params)
self.param_pub.run(False)
return False
def run(self, image, speed=None):
if not speed:
self.speed = self.target_speed
else:
self.speed = speed
if image is not None:
self.image = image
self.dead = self.is_dead(
self.image) if not self.sim else self.is_dead_sim(self.image)
if self.step > 0 and not self.training:
"""Save observation to replay buffer"""
if THROTTLE_MAX == THROTTLE_MIN:
reward = 1
else:
reward = 1 + (self.speed - THROTTLE_MIN) / (THROTTLE_MAX -
THROTTLE_MIN)
reward = min(reward, 2) / 2
done = self.dead
reward = reward * -10 if self.dead else reward
next_command_history = np.roll(self.command_history, 3)
next_command_history[:3] = [
self.steering, self.target_speed, self.speed
]
next_state = np.roll(self.state, IMAGE_CHANNELS)
next_state[:IMAGE_CHANNELS, :, :] = self.agent.process_im(
self.image, IMAGE_SIZE, RGB)
self.replay_buffer.append([[self.state, self.command_history],
[self.steering, self.target_speed],
[reward],
[next_state, next_command_history],
[float(not done)]])
self.episode_reward += reward
step_end = time.time()
self.state = next_state
self.command_history = next_command_history
print(
f"Episode: {self.episode}, Step: {self.step}, Reward: {reward:.2f}, Episode reward: {self.episode_reward:.2f}, Step time: {(self.step_start - step_end):.2f}, Speed: {self.speed:.2f}, Throttle: {self.target_speed:.2f}"
)
if self.step > self.max_episode_steps or (self.dead
and not self.training):
self.training_start = time.time()
self.step = 0
self.steering = 0
self.target_speed = 0
self.training = True
self.replay_buffer = self.replay_buffer[SKIP_INITIAL_STEPS:]
return self.steering, self.target_speed, self.training
if self.training:
self.training = self.train()
self.dead = False
return self.steering, self.target_speed, self.training
if self.step == 0:
if not self.sim:
input("Press Enter to start a new episode.")
self.reset(self.agent.process_im(self.image, IMAGE_SIZE, RGB))
self.step += 1
if self.step < SKIP_INITIAL_STEPS:
return 0.001, 0, False
self.step_start = time.time()
#if self.episode < RANDOM_EPISODES:
# action = action_space.sample()
#else:
action = self.agent.select_action((self.state, self.command_history))
self.steering, self.target_speed = self.enforce_limits(
action, self.command_history[:2])
return self.steering, self.target_speed, self.training
def is_dead(self, img):
"""
Counts the black pixels from the ground and compares the amount to a threshold value.
If there are not enough black pixels the car is assumed to be off the track.
"""
crop_height = 20
crop_width = 20
threshold = 70
pixels_percentage = 0.10
pixels_required = (img.shape[1] -
2 * crop_width) * crop_height * pixels_percentage
crop = img[-crop_height:, crop_width:-crop_width]
r = crop[:, :, 0] < threshold
g = crop[:, :, 1] < threshold
b = crop[:, :, 2] < threshold
pixels = (r & g & b).sum()
#print("Pixels: {}, Required: {}".format(pixels, pixels_required))
return pixels < pixels_required
def is_dead_sim(self, img):
crop_height = 40
required = 0.8
cropped = img[-crop_height:]
rgb = cropped[:, :, 0] > cropped[:, :, 2]
return rgb.sum() / (crop_height * 160) > required
def enforce_limits(self, action, prev_action):
"""
Scale the agent actions to environment limits
"""
prev_steering = prev_action[0]
prev_throttle = prev_action[1]
var = (THROTTLE_MAX - THROTTLE_MIN) / 2
mu = (THROTTLE_MAX + THROTTLE_MIN) / 2
raw_throttle = action[1] * var + mu
steering = np.clip(action[0], prev_steering - MAX_STEERING_DIFF,
prev_steering + MAX_STEERING_DIFF)
steering = np.clip(steering, STEER_LIMIT_LEFT, STEER_LIMIT_RIGHT)
throttle = np.clip(raw_throttle, prev_throttle - MAX_THROTTLE_DIFF,
prev_throttle + MAX_THROTTLE_DIFF)
return [steering, throttle]