def update():
global curve, plot_container, data_storage, foot_locations, tick
horizontal_velocity = (0.2, 0.0)
yaw_rate = 0.0
target_height = -0.16
current_height = target_height
foot_locations = controller.step_gait(foot_locations,
np.array(horizontal_velocity),
yaw_rate, target_height,
current_height, tick)
tick += 1
joints = ik(foot_locations, quat) # replace with current body orientation
# foot_history.append(np.copy(foot_locations.T))
data_storage.append(foot_locations.T)
data_arr = np.array(data_storage)
# sim.action(controller_to_sim(joints))
sim.set(controller_to_sim(joints))
for _ in range(substeps):
sim.step()
foot1.setData(x=data_arr[:, 0, 0], y=data_arr[:, 0, 2])
foot2.setData(x=data_arr[:, 1, 0], y=data_arr[:, 1, 2])
foot3.setData(x=data_arr[:, 2, 0], y=data_arr[:, 2, 2])
foot4.setData(x=data_arr[:, 3, 0], y=data_arr[:, 3, 2])
def step(self, action):
action_clean = self.sanitize_actions(action)
pos_before, _, _ = self.sim.get_pos_orn_vel()
# The action command only sets the goals of the motors. It doesn't actually step the simulation forward in
# time. Instead of feeding the simulator the action directly, we take the mean of the last N actions,
# where N comes from the action_smoothing hyper-parameter
self.action_smoothing.append(action_clean)
action_agent = np.mean(self.action_smoothing, axis=0)
action_gait = controller_to_sim(
self.gait.act(velocity_horizontal=(0.2, 0), normalized=False))
action = self.gait_factor * action_gait + (
1 - self.gait_factor) * action_agent
# let's clip again just to be safe and within the boundaries of the expert
action = np.clip(
action,
np.max((self.joints_hard_limit_lower,
action_gait + 0.2 * self.joints_hard_limit_lower),
axis=0),
np.min((self.joints_hard_limit_uppper,
action_gait + 0.2 * self.joints_hard_limit_uppper),
axis=0),
)
self.sim.action(action)
for _ in range(self.sim_steps):
self.sim.step()
pos_after, orn_after, _ = self.sim.get_pos_orn_vel()
obs = self.get_obs()
# this reward calculation is taken verbatim from halfcheetah-v2, save
reward_ctrl = -np.square(action).sum()
reward_run = (pos_after[0] - pos_before[0]) / self.dt
# technically we should divide the next line by (3*pi^2) but that's really hard to reach
reward_stable = -np.square(orn_after).sum() / np.square(np.pi)
reward = self.rcoeff_ctrl * reward_ctrl + self.rcoeff_run * reward_run + self.rcoeff_stable * reward_stable
done = False
self.episode_steps += 1
if self.episode_steps == self.episode_steps_max:
done = True
if self.stop_on_flip:
flipped = self.sim.check_collision()
if flipped:
done = True
reward -= 1000
return obs, reward, done, dict(reward_run=reward_run,
reward_ctrl=reward_ctrl,
reward_stable=reward_stable)
def step(self, action):
self.start_step()
self.old_pos, _, _ = self.sim.get_pos_orn_vel()
foot_position = self._get_action(action)
joints = ik(foot_position.T,
self.quat) # replace with current body orientation
# joints = ik(action, self.quat)
self.sim.action(controller_to_sim(joints))
for _ in range(self.sim_steps):
self.sim.step()
self.episode_steps += 1
# return self._get_obs(), self._get_reward(action), self._get_done(), self._get_info()
return self._get_obs(), 0, self._get_done(), self._get_info()
def sanitize_actions(self, actions):
assert len(actions) == 12
actions_clipped = (np.clip(actions, -1, 1).astype(np.float32) + 1) / 2
# denormalize actions to correspond to foot offset
actions_denorm = actions_clipped * self.foot_ranges_diff + self.foot_ranges[:, 0]
# stepping the gait to get the foot positions
self.gait.act(velocity_horizontal=(0.2, 0), normalized=False)
# combine the gait with the offset, half-half
actions_merged = 0.5 * actions_denorm + 0.5 * self.gait.state.foot_locations.T.flatten()
# make sure feet don't exceed the foot max range
clipped_feet = np.clip(actions_merged, self.foot_ranges[:, 0], self.foot_ranges[:, 1])
# reshape and apply inverse kinematics to get joints from feet
clipped_feet = clipped_feet.reshape(4, 3).T
joints = self.gait.controller.inverse_kinematics(clipped_feet, self.gait.controller.config)
# convert joints from 3,4 repr to sim-usable one
joints = controller_to_sim(joints)
return joints
def _get_action(self, action):
"""
We do not give raw action to the agent, we need some processing on the raw action values.
:param action: raw action
:return: processed action
"""
action_clean = self.sanitize_actions(action)
# The action command only sets the goals of the motors. It doesn't actually step the simulation forward in
# time. Instead of feeding the simulator the action directly, we take the mean of the last N actions,
# where N comes from the action_smoothing hyper-parameter
self.action_smoothing.append(action_clean)
action_agent = np.mean(self.action_smoothing, axis=0)
# TODO: Verify this, there an array of 2 and legs actions are in first dim, I added [0]
# (maybe because of an update of gait for the arm actions ?)
action_gait = controller_to_sim(self.gait.act(velocity_horizontal=(0.2, 0), normalized=False)[0])
action = self.gait_factor * action_gait + (1 - self.gait_factor) * action_agent
# let's clip again just to be safe and within the boundaries of the expert
return np.clip(
action,
np.max((self.joints_hard_limit_lower, action_gait + 0.2 * self.joints_hard_limit_lower), axis=0),
np.min((self.joints_hard_limit_uppper, action_gait + 0.2 * self.joints_hard_limit_uppper), axis=0),
)
import time
import gym
import gym_pupper
from gym_pupper.common.Utilities import controller_to_sim
from gym_pupper.pupper.policy import HardPolicy
ROLLOUTS = 5
env = gym.make(
"Pupper-Walk-Absolute-aScale_1.0-gFact_0.0-RandomZRot_1-Graphical-v0")
for run in range(ROLLOUTS):
state = env.reset()
policy = HardPolicy()
while True:
action = controller_to_sim(
policy.act(velocity_horizontal=(0.2, 0), normalized=True))
print(action)
quit()
next_state, rew, done, misc = env.step(action)
if done:
break
time.sleep(1 / 60)
# txt = "arm up"
# elif 60 * 41 < i <= 60 * 47:
# vel_arm = (0, 0.0001, -0.001)
# txt = "arm down"
# else:
# quit()
# if 60 * 29 < i:
# vel_body = (idle_walk_fw, 0)
action, action_arm = policy.act(velocity_horizontal=(0.2, 0),
yaw_rate=0.8,
normalized=True,
velocity_arm=(0, 0, 0))
# print(action_arm)
action = controller_to_sim(action) * np.pi # denormalize
arm_angles.append(action_arm)
# print(i // 60, policy.state.arm_pos, action_arm)
sim.action(action)
sim.action_arm(action_arm)
for _ in range(substeps):
sim.step()
# time.sleep(0.01)
if i % 2 == 0:
img, _ = sim.take_photo(follow_bot=False,
camera_offset=(0.5, 0.4, 0.4),
lookat_offset=(0.5, 0, 0))
font = cv2.FONT_HERSHEY_SIMPLEX
img = np.array(img)
# cv2.putText(img, txt, (200, 200), font, 1, (255, 106, 213), 2, cv2.LINE_AA)
config = SimpleConfig(dt=1 / FPS)
controller = SimpleController(config)
foot_locations = DEFAULT_STANCE + np.array([0, 0, DEFAULT_Z_REF
])[:, np.newaxis]
sim = PupperSim2(with_arm=False,
frequency=240,
debug=True,
img_size=(512, 256))
# sim.make_kinematic((0.588, 0.419, 1, 1)) # use with sim.set(), otherwise use sim.action()
sim.reset()
# sim.action_arm([0, 0, 0])
# sim.change_color((0.588, 0.419, 1, 1))
for tick in trange(steps):
horizontal_velocity = (0.2, 0.0)
yaw_rate = 0.0
target_height = -0.16
current_height = target_height
foot_locations = controller.step_gait(foot_locations,
np.array(horizontal_velocity),
yaw_rate, target_height,
current_height, tick)
joints = ik(foot_locations,
quat) # replace with current body orientation
sim.action(controller_to_sim(joints))
# sim.set(controller_to_sim(joints))
for _ in range(substeps):
sim.step()
policy = HardPolicy()
last_reset_val = -1
last_plot_val = -1
joints = []
counter = 0
while True:
vel = [0, 0]
for param_idx, param in enumerate(debug_params):
val = sim.p.readUserDebugParameter(param)
if param_idx < 2:
vel[param_idx] = val
if param_idx == 2 and val != last_reset_val:
reset_sim()
last_reset_val = val
if param_idx == 3 and val != last_plot_val:
if len(joints) > 0:
plot_joints(joints)
last_plot_val = val
joints.clear()
cmd, _ = policy.act(velocity_horizontal=vel)
action = controller_to_sim(cmd)
joints.append(np.copy(action))
sim.action(action)
for _ in range(substeps):
sim.step()
time.sleep(1 / FPS)
from gym_pupper.pupper.policy import HardPolicy
FREQ_CTRL = 60
TEST_BODY = False
TEST_ARM = True
policy = HardPolicy(fps=FREQ_CTRL)
########### BODY
if TEST_BODY:
iterations = 10_000
times = 0
for _ in range(iterations):
start = time.time()
_ = controller_to_sim(policy.act(velocity_horizontal=(0.2, 0), yaw_rate=1.0, normalized=True)) * np.pi
diff = time.time() - start
times += diff
print(
f"BODY: ran {iterations} iteractions at {np.around(iterations/times,1)}Hz, "
f"so avg of {times/iterations}s per iterations"
)
# MBP 2018, ran 100000 iteractions at 1749.8Hz, so avg of 0.000571490352153778s per iterations
########### ARM
if TEST_ARM:
iterations = 100
times = 0
for _ in range(iterations):
start = time.time()
import numpy as np
from scipy import fftpack
from tqdm import trange
import matplotlib.pyplot as plt
from gym_pupper.common.Utilities import controller_to_sim
from gym_pupper.pupper.policy import HardPolicy
policy = HardPolicy()
steps = 2000
joints = []
feet = []
for _ in trange(steps):
joints_legs, _ = policy.act(velocity_horizontal=(0.2, 0),
yaw_rate=0.0,
normalized=False)
action = controller_to_sim(joints_legs)
joints.append(action)
feet.append(policy.state.foot_locations.T)
feet = np.array(feet)
print(feet.shape)
x = np.arange(0, steps)
fig, axs = plt.subplots(2, 2, sharex=True, sharey=True)
for foot in range(4):
im = axs[foot // 2][foot % 2].scatter(feet[:, foot, 0],
feet[:, foot, 2],
alpha=0.5,
c=x,
cmap="viridis")
# axs[foot%2][foot//2].legend()
