add Franka Panda URDF and example (python3 -m pybullet_envs.examples.loadpanda)

add XArm6 URDF with optimized collision meshes and example (XArm gripper needs more work) python3 -m pybullet_envs.examples.xarm

examples/pybullet/gym/pybullet_envs/examples/batchsim3.py

@@ -0,0 +1,189 @@
+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)
+
+from pybullet_utils import bullet_client
+import panda_sim
+
+
+import time
+
+useGUI = False
+timeStep = 1./60.
+
+# Importing the libraries
+import os
+import time
+import multiprocessing as mp
+from multiprocessing import Process, Pipe
+
+pandaEndEffectorIndex = 11 #8
+pandaNumDofs = 7
+
+
+_RESET = 1
+_CLOSE = 2
+_EXPLORE = 3
+
+
+def ExploreWorker(rank, num_processes, childPipe, args):
+  print("hi:",rank, " out of ", num_processes)  
+  import pybullet as op1
+  import pybullet_data as pd
+  logName=""
+  p1=0
+  n = 0
+  space = 2 
+  simulations=[]
+  sims_per_worker = 10
+  
+  offsetY = rank*space
+  while True:
+    n += 1
+    try:
+      # Only block for short times to have keyboard exceptions be raised.
+      if not childPipe.poll(0.0001):
+        continue
+      message, payload = childPipe.recv()
+    except (EOFError, KeyboardInterrupt):
+      break
+    if message == _RESET:
+      if (useGUI):
+        p1 = bullet_client.BulletClient(op1.GUI)
+      else:
+        p1 = bullet_client.BulletClient(op1.DIRECT)
+      p1.setTimeStep(timeStep)
+      
+      p1.setPhysicsEngineParameter(numSolverIterations=8)
+      p1.setPhysicsEngineParameter(minimumSolverIslandSize=100)
+      p1.configureDebugVisualizer(p1.COV_ENABLE_Y_AXIS_UP,1)
+      p1.configureDebugVisualizer(p1.COV_ENABLE_RENDERING,0)
+      p1.setAdditionalSearchPath(pd.getDataPath())
+      p1.setGravity(0,-9.8,0)
+      logName = str("batchsim")+str(rank)
+      for j in range (3):
+        offsetX = 0#-sims_per_worker/2.0*space
+        for i in range (sims_per_worker):
+          offset=[offsetX,0, offsetY]
+          sim = panda_sim.PandaSim(p1, offset)
+          simulations.append(sim)
+          offsetX += space 
+        offsetY += space 
+      childPipe.send(["reset ok"])
+      p1.configureDebugVisualizer(p1.COV_ENABLE_RENDERING,1)
+      for i in range (100):
+        p1.stepSimulation()
+      
+      logId = p1.startStateLogging(op1.STATE_LOGGING_PROFILE_TIMINGS,logName)
+      continue
+    if message == _EXPLORE:
+      sum_rewards=rank
+      
+      if useGUI:
+        numSteps = int(20000)
+      else:
+        numSteps = int(5)
+      for i in range (numSteps):
+        for s in simulations:
+          s.step()
+        p1.stepSimulation()
+      #print("logId=",logId)
+      #print("numSteps=",numSteps)
+
+      childPipe.send([sum_rewards])
+      continue
+    if message == _CLOSE:
+      p1.stopStateLogging(logId)
+      childPipe.send(["close ok"])
+      break
+  childPipe.close()
+  
+
+if __name__ == "__main__":
+  mp.freeze_support()
+  if useGUI:
+    num_processes = 1
+  else:
+    num_processes = 12
+  processes = []
+  args=[0]*num_processes
+  
+  childPipes = []
+  parentPipes = []
+
+  for pr in range(num_processes):
+    parentPipe, childPipe = Pipe()
+    parentPipes.append(parentPipe)
+    childPipes.append(childPipe)
+
+  for rank in range(num_processes):
+    p = mp.Process(target=ExploreWorker, args=(rank, num_processes, childPipes[rank],  args))
+    p.start()
+    processes.append(p)
+      
+  
+  for parentPipe in parentPipes:
+    parentPipe.send([_RESET, "blaat"])
+  
+  positive_rewards = [0]*num_processes
+  for k in range(num_processes):
+    #print("reset msg=",parentPipes[k].recv()[0])
+    msg = parentPipes[k].recv()[0]
+  
+  for parentPipe in parentPipes:
+    parentPipe.send([_EXPLORE, "blaat"])
+  
+  positive_rewards = [0]*num_processes
+  for k in range(num_processes):
+    positive_rewards[k] = parentPipes[k].recv()[0]
+    #print("positive_rewards=",positive_rewards[k])
+
+  
+  for parentPipe in parentPipes:
+    parentPipe.send([_EXPLORE, "blaat"])
+  
+  positive_rewards = [0]*num_processes
+  for k in range(num_processes):
+    positive_rewards[k] = parentPipes[k].recv()[0]
+    #print("positive_rewards=",positive_rewards[k])
+    msg = positive_rewards[k]
+
+  for parentPipe in parentPipes:
+    parentPipe.send([_EXPLORE, "blaat"])
+  
+  positive_rewards = [0]*num_processes
+  for k in range(num_processes):
+    positive_rewards[k] = parentPipes[k].recv()[0]
+    #print("positive_rewards=",positive_rewards[k])
+
+  
+  for parentPipe in parentPipes:
+    parentPipe.send([_CLOSE, "pay2"])
+  
+  for p in processes:
+    p.join()
+  
+  #now we merge the separate json files into a single one
+  fnameout = 'batchsim.json'
+  count = 0
+  outfile = open(fnameout, "w+")
+  outfile.writelines(["{\"traceEvents\":[\n"])
+  numFiles = num_processes
+  for num in range(numFiles):
+    print("num=",num)
+    fname = 'batchsim%d_0.json' % (num)
+    with open(fname) as infile:
+        for line in infile:
+          if "pid" in line:
+            line = line.replace('\"pid\":1', '\"pid\":'+str(num))
+            if num < (numFiles-1) and not "{}}," in line:
+              line = line.replace('{}}', '{}},')
+              print("line[",count,"]=",line)
+            outfile.write(line)
+          count += 1
+  print ("count=",count)
+  outfile.writelines(["],\n"])
+  outfile.writelines(["\"displayTimeUnit\": \"ns\"}\n"])
+  outfile.close()

examples/pybullet/gym/pybullet_envs/examples/loadpanda.py

@@ -0,0 +1,21 @@
+import pybullet as p
+import pybullet_data as pd
+import math
+import time
+import numpy as np
+import panda_sim
+
+p.connect(p.GUI)
+p.configureDebugVisualizer(p.COV_ENABLE_Y_AXIS_UP,1)
+p.setAdditionalSearchPath(pd.getDataPath())
+
+timeStep=1./60.
+p.setTimeStep(timeStep)
+p.setGravity(0,-9.8,0)
+ 
+panda = panda_sim.PandaSim(p,[0,0,0])
+while (1):
+	panda.step()
+	p.stepSimulation()
+	time.sleep(timeStep)
+	

examples/pybullet/gym/pybullet_envs/examples/panda_sim.py

@@ -0,0 +1,65 @@
+import time
+import numpy as np
+import math
+
+useNullSpace = 1
+ikSolver = 0
+pandaEndEffectorIndex = 11 #8
+pandaNumDofs = 7
+
+ll = [-7]*pandaNumDofs
+#upper limits for null space (todo: set them to proper range)
+ul = [7]*pandaNumDofs
+#joint ranges for null space (todo: set them to proper range)
+jr = [7]*pandaNumDofs
+#restposes for null space
+jointPositions=[0.98, 0.458, 0.31, -2.24, -0.30, 2.66, 2.32, 0.02, 0.02]
+rp = jointPositions
+
+class PandaSim(object):
+  def __init__(self, bullet_client, offset):
+    self.bullet_client = bullet_client
+    self.offset = np.array(offset)
+    
+    #print("offset=",offset)
+    flags = self.bullet_client.URDF_ENABLE_CACHED_GRAPHICS_SHAPES
+    legos=[]
+    self.bullet_client.loadURDF("tray/traybox.urdf", [0+offset[0], 0+offset[1], -0.6+offset[2]], [-0.5, -0.5, -0.5, 0.5], flags=flags)
+    legos.append(self.bullet_client.loadURDF("lego/lego.urdf",np.array([0.1, 0.3, -0.5])+self.offset, flags=flags))
+    legos.append(self.bullet_client.loadURDF("lego/lego.urdf",np.array([-0.1, 0.3, -0.5])+self.offset, flags=flags))
+    legos.append(self.bullet_client.loadURDF("lego/lego.urdf",np.array([0.1, 0.3, -0.7])+self.offset, flags=flags))
+    sphereId = self.bullet_client.loadURDF("sphere_small.urdf",np.array( [0, 0.3, -0.6])+self.offset, flags=flags)
+    self.bullet_client.loadURDF("sphere_small.urdf",np.array( [0, 0.3, -0.5])+self.offset, flags=flags)
+    self.bullet_client.loadURDF("sphere_small.urdf",np.array( [0, 0.3, -0.7])+self.offset, flags=flags)
+    orn=[-0.707107, 0.0, 0.0, 0.707107]#p.getQuaternionFromEuler([-math.pi/2,math.pi/2,0])
+    eul = self.bullet_client.getEulerFromQuaternion([-0.5, -0.5, -0.5, 0.5])
+    self.panda = self.bullet_client.loadURDF("franka_panda/panda.urdf", np.array([0,0,0])+self.offset, orn, useFixedBase=True, flags=flags)
+    index = 0
+    for j in range(self.bullet_client.getNumJoints(self.panda)):
+      self.bullet_client.changeDynamics(self.panda, j, linearDamping=0, angularDamping=0)
+      info = self.bullet_client.getJointInfo(self.panda, j)
+  
+      jointName = info[1]
+      jointType = info[2]
+      if (jointType == self.bullet_client.JOINT_PRISMATIC):
+        
+        self.bullet_client.resetJointState(self.panda, j, jointPositions[index]) 
+        index=index+1
+      if (jointType == self.bullet_client.JOINT_REVOLUTE):
+        self.bullet_client.resetJointState(self.panda, j, jointPositions[index]) 
+        index=index+1
+    self.t = 0.
+  def reset(self):
+    pass
+
+  def step(self):
+    t = self.t
+    self.t += 1./60.
+    pos = [self.offset[0]+0.2 * math.sin(1.5 * t), self.offset[1]+0.044, self.offset[2]+-0.6 + 0.1 * math.cos(1.5 * t)]
+    orn = self.bullet_client.getQuaternionFromEuler([math.pi/2.,0.,0.])
+    jointPoses = self.bullet_client.calculateInverseKinematics(self.panda,pandaEndEffectorIndex, pos, orn, ll, ul,
+      jr, rp, maxNumIterations=5)
+    for i in range(pandaNumDofs):
+        self.bullet_client.setJointMotorControl2(self.panda, i, self.bullet_client.POSITION_CONTROL, jointPoses[i],force=5 * 240.)
+    pass
+  

examples/pybullet/gym/pybullet_envs/examples/xarm.py

@@ -0,0 +1,15 @@
+import pybullet as p
+import pybullet_data as pd
+import time
+p.connect(p.GUI)
+p.setAdditionalSearchPath(pd.getDataPath())
+
+
+useFixedBase = True
+flags = p.URDF_INITIALIZE_SAT_FEATURES#0#p.URDF_USE_SELF_COLLISION
+xarm = p.loadURDF("xarm/xarm6_with_gripper.urdf", flags = flags, useFixedBase=useFixedBase)
+
+while (1):
+	p.stepSimulation()
+	time.sleep(1./240.)
+