add humanoid_deepmimic_gym_env.py for HumanoidDeepMimicBulletEnv-v1 (still untested)

examples/pybullet/gym/pybullet_envs/ARS/ars.py

@@ -1,5 +1,11 @@
 # AI 2018
 
+import os
+import inspect
+currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+parentdir = os.path.dirname(os.path.dirname(currentdir))
+os.sys.path.insert(0,parentdir)
+
 # Importing the libraries
 import os
 import numpy as np

examples/pybullet/gym/pybullet_envs/__init__.py

@@ -8,6 +8,13 @@ def register(id,*args,**kvargs):
 
 # ------------bullet-------------
 
+register(
+        id='HumanoidDeepMimicBulletEnv-v1',
+        entry_point='pybullet_envs.deep_mimic:HumanoidDeepMimicGymEnv',
+        max_episode_steps=1000,
+        reward_threshold=20000.0,
+)
+
 register(
 	id='CartPoleBulletEnv-v1',
 	entry_point='pybullet_envs.bullet:CartPoleBulletEnv',

examples/pybullet/gym/pybullet_envs/deep_mimic/__init__.py

@@ -0,0 +1 @@
+from pybullet_envs.deep_mimic.humanoid_deepmimic_gym_env import HumanoidDeepMimicGymEnv

examples/pybullet/gym/pybullet_envs/deep_mimic/humanoid.py

@@ -177,14 +177,13 @@ class Humanoid(object):
     self.kin_client.setGravity(0,-9.8,0)
     
     self._motion_data = motion_data
+    print("LOADING humanoid!")
     self._humanoid = self._pybullet_client.loadURDF(
       "humanoid/humanoid.urdf", [0,0.9,0],globalScaling=0.25, useFixedBase=False)
       
     self._kinematicHumanoid = self.kin_client.loadURDF(
       "humanoid/humanoid.urdf", [0,0.9,0],globalScaling=0.25, useFixedBase=False)
       
-    #self._humanoidDebug = self._pybullet_client.loadURDF(
-    #  "humanoid/humanoid.urdf", [0,0.9,3],globalScaling=0.25, useFixedBase=True)
       
     #print("human #joints=", self._pybullet_client.getNumJoints(self._humanoid))
     pose = HumanoidPose()
@@ -676,5 +675,9 @@ class Humanoid(object):
     #print("reward = %f (pose_reward=%f, vel_reward=%f, end_eff_reward=%f, root_reward=%f, com_reward=%f)\n", reward,
     # pose_reward,vel_reward,end_eff_reward, root_reward, com_reward);
     
-    
-    return reward
+    return reward
+
+  def GetBasePosition(self):
+    pos,orn = self._pybullet_client.getBasePositionAndOrientation(self._humanoid)
+    return pos
+

examples/pybullet/gym/pybullet_envs/deep_mimic/humanoid_deepmimic_gym_env.py

@@ -0,0 +1,277 @@
+"""This file implements the gym environment of humanoid deepmimic using PyBullet.
+
+"""
+import math
+import time
+
+import os,  inspect
+currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+parentdir = os.path.dirname(os.path.dirname(currentdir))
+os.sys.path.insert(0,parentdir)
+
+import gym
+from gym import spaces
+from gym.utils import seeding
+import random
+import numpy as np
+import pybullet
+import pybullet_data
+from pybullet_envs.deep_mimic.humanoid import Humanoid
+from pkg_resources import parse_version
+from pybullet_utils import bullet_client
+from pybullet_envs.deep_mimic.motion_capture_data import MotionCaptureData
+
+RENDER_HEIGHT = 360
+RENDER_WIDTH = 480
+
+
+class HumanoidDeepMimicGymEnv(gym.Env):
+  """The gym environment for the humanoid deep mimic.
+  """
+  metadata = {
+      "render.modes": ["human", "rgb_array"],
+      "video.frames_per_second": 100
+  }
+
+  def __init__(self,
+               urdf_root=pybullet_data.getDataPath(),
+               render=False):
+    """Initialize the gym environment.
+
+    Args:
+      urdf_root: The path to the urdf data folder.
+      render: Whether to render the simulation.
+    Raises:
+      ValueError: If the urdf_version is not supported.
+    """
+    # Set up logging.
+    self._urdf_root = urdf_root
+    self._observation = []
+    self._env_step_counter = 0
+    self._is_render = render
+    self._cam_dist = 1.0
+    self._cam_yaw = 0
+    self._cam_pitch = -30
+    self._ground_id = None
+    self._pybullet_client = None
+    self._humanoid = None
+    self._control_time_step = 8.*(1./240.)#0.033333
+    self._seed()
+    observation_high = (self._get_observation_upper_bound())
+    observation_low = (self._get_observation_lower_bound())
+    action_dim = 36
+    self._action_bound = 3.14 #todo: check this
+    action_high = np.array([self._action_bound] * action_dim)
+    self.action_space = spaces.Box(-action_high, action_high)
+    self.observation_space = spaces.Box(observation_low, observation_high)
+
+  def _close(self):
+    self._humanoid = None
+    self._pybullet_client.disconnect()
+    
+
+  def _reset(self):
+    if (self._pybullet_client==None):
+      if self._is_render:
+        self._pybullet_client = bullet_client.BulletClient(
+          connection_mode=pybullet.GUI)
+      else:
+        self._pybullet_client = bullet_client.BulletClient()
+      self._pybullet_client.setAdditionalSearchPath(pybullet_data.getDataPath())
+      self._pybullet_client.configureDebugVisualizer(self._pybullet_client.COV_ENABLE_Y_AXIS_UP,1)
+      self._motion=MotionCaptureData()
+      motionPath = pybullet_data.getDataPath()+"/motions/humanoid3d_walk.txt"#humanoid3d_spinkick.txt"#/motions/humanoid3d_backflip.txt"
+      self._motion.Load(motionPath)
+      self._pybullet_client.configureDebugVisualizer(
+        self._pybullet_client.COV_ENABLE_RENDERING, 0)
+      self._pybullet_client.resetSimulation()
+      self._pybullet_client.setGravity(0,-9.8,0)
+      y2zOrn = self._pybullet_client.getQuaternionFromEuler([-1.57,0,0])
+      self._ground_id = self._pybullet_client.loadURDF(
+          "%s/plane.urdf" % self._urdf_root, [0,0,0], y2zOrn)
+      #self._pybullet_client.changeVisualShape(self._ground_id,-1,rgbaColor=[1,1,1,0.8])
+      #self._pybullet_client.configureDebugVisualizer(self._pybullet_client.COV_ENABLE_PLANAR_REFLECTION,self._ground_id)
+      shift=[0,0,0]
+      self._humanoid = Humanoid(self._pybullet_client,self._motion,shift)
+ 
+    self._humanoid.Reset()
+    simTime = random.randint(0,self._motion.NumFrames()-2)
+    self._humanoid.SetSimTime(simTime)
+    pose = self._humanoid.InitializePoseFromMotionData()
+    self._humanoid.ApplyPose(pose, True, True, self._humanoid._humanoid,self._pybullet_client)
+
+    self._env_step_counter = 0
+    self._objectives = []
+    self._pybullet_client.resetDebugVisualizerCamera(
+        self._cam_dist, self._cam_yaw, self._cam_pitch, [0, 0, 0])
+    self._pybullet_client.configureDebugVisualizer(
+        self._pybullet_client.COV_ENABLE_RENDERING, 1)
+    return self._get_observation()
+
+  def _seed(self, seed=None):
+    self.np_random, seed = seeding.np_random(seed)
+    return [seed]
+
+  def _step(self, action):
+    """Step forward the simulation, given the action.
+
+    Args:
+      action: A list of desired motor angles for eight motors.
+
+    Returns:
+      observations: The angles, velocities and torques of all motors.
+      reward: The reward for the current state-action pair.
+      done: Whether the episode has ended.
+      info: A dictionary that stores diagnostic information.
+
+    Raises:
+      ValueError: The action dimension is not the same as the number of motors.
+      ValueError: The magnitude of actions is out of bounds.
+    """
+    self._last_base_position = self._humanoid.GetBasePosition()
+
+    if self._is_render:
+      # Sleep, otherwise the computation takes less time than real time,
+      # which will make the visualization like a fast-forward video.
+      #time_spent = time.time() - self._last_frame_time
+      #self._last_frame_time = time.time()
+      #time_to_sleep = self._control_time_step - time_spent
+      #if time_to_sleep > 0:
+      #  time.sleep(time_to_sleep)
+      base_pos = self._humanoid.GetBasePosition()
+      # Keep the previous orientation of the camera set by the user.
+      [yaw, pitch,
+       dist] = self._pybullet_client.getDebugVisualizerCamera()[8:11]
+      self._pybullet_client.resetDebugVisualizerCamera(dist, yaw, pitch,
+                                                       base_pos)
+
+
+    self._humanoid.ApplyAction(action)
+    for s in range (8):
+      #print("step:",s)
+      self._pybullet_client.stepSimulation()
+    reward = self._reward()
+    done = self._termination()
+    self._env_step_counter += 1
+    return np.array(self._get_observation()), reward, done, {}
+
+  def _render(self, mode="rgb_array", close=False):
+    if mode == "human":
+      self._is_render = True
+    if mode != "rgb_array":
+      return np.array([])
+    base_pos = self._humanoid.GetBasePosition()
+    view_matrix = self._pybullet_client.computeViewMatrixFromYawPitchRoll(
+        cameraTargetPosition=base_pos,
+        distance=self._cam_dist,
+        yaw=self._cam_yaw,
+        pitch=self._cam_pitch,
+        roll=0,
+        upAxisIndex=1)
+    proj_matrix = self._pybullet_client.computeProjectionMatrixFOV(
+        fov=60,
+        aspect=float(RENDER_WIDTH) / RENDER_HEIGHT,
+        nearVal=0.1,
+        farVal=100.0)
+    (_, _, px, _, _) = self._pybullet_client.getCameraImage(
+        width=RENDER_WIDTH,
+        height=RENDER_HEIGHT,
+        renderer=self._pybullet_client.ER_BULLET_HARDWARE_OPENGL,
+        viewMatrix=view_matrix,
+        projectionMatrix=proj_matrix)
+    rgb_array = np.array(px)
+    rgb_array = rgb_array[:, :, :3]
+    return rgb_array
+
+  def _termination(self):
+    if (self._humanoid):
+      term = self._humanoid.Terminates()
+      return term
+    return False
+
+  def _reward(self):
+    reward = 0
+    if (self._humanoid):
+      reward = self._humanoid.GetReward()
+    return reward
+
+  def get_objectives(self):
+    return self._objectives
+
+  @property
+  def objective_weights(self):
+    """Accessor for the weights for all the objectives.
+
+    Returns:
+      List of floating points that corresponds to weights for the objectives in
+      the order that objectives are stored.
+    """
+    return self._objective_weights
+
+  def _get_observation(self):
+    """Get observation of this environment.
+    """
+
+    observation = []
+    if (self._humanoid):
+      observation = self._humanoid.GetState()
+    else:
+      observation = [0]*197
+
+    self._observation = observation
+    return self._observation
+
+
+  def _get_observation_upper_bound(self):
+    """Get the upper bound of the observation.
+
+    Returns:
+      The upper bound of an observation. See GetObservation() for the details
+        of each element of an observation.
+    """
+    upper_bound = np.zeros(self._get_observation_dimension())
+    upper_bound[0] = 10 #height
+    upper_bound[1:107] = math.pi  # Joint angle.
+    upper_bound[107:197] = 10 #joint velocity, check it
+    return upper_bound
+
+  def _get_observation_lower_bound(self):
+    """Get the lower bound of the observation."""
+    return -self._get_observation_upper_bound()
+
+  def _get_observation_dimension(self):
+    """Get the length of the observation list.
+
+    Returns:
+      The length of the observation list.
+    """
+    return len(self._get_observation())
+
+  def configure(self, args):
+    pass
+
+  if parse_version(gym.__version__)>=parse_version('0.9.6'):
+                close = _close
+                render = _render
+                reset = _reset
+                seed = _seed
+                step = _step
+
+
+  @property
+  def pybullet_client(self):
+    return self._pybullet_client
+
+  @property
+  def ground_id(self):
+    return self._ground_id
+
+  @ground_id.setter
+  def ground_id(self, new_ground_id):
+    self._ground_id = new_ground_id
+
+  @property
+  def env_step_counter(self):
+    return self._env_step_counter
+
+

examples/pybullet/gym/pybullet_envs/deep_mimic/humanoid_test.py

@@ -3,9 +3,9 @@ currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentfram
 parentdir = os.path.dirname(os.path.dirname(currentdir))
 os.sys.path.insert(0,parentdir)
 
-from pybullet_envs.mimic.humanoid import Humanoid
+from pybullet_envs.deep_mimic.humanoid import Humanoid
 from pybullet_utils.bullet_client import BulletClient
-from pybullet_envs.mimic.motion_capture_data import MotionCaptureData
+from pybullet_envs.deep_mimic.motion_capture_data import MotionCaptureData
 import pybullet_data
 import pybullet
 import time
@@ -72,6 +72,9 @@ while (1):
   	Reset(humanoid)
   	
   state = humanoid.GetState()
+  print("len(state)=",len(state))
+  print("state=", state)
+
   action = [0]*36
   humanoid.ApplyAction(action)
   for s in range (8):