fix rotational friction between btMultiBody and btRigidBody

examples/pybullet/examples/rotationalFriction.py

@@ -0,0 +1,15 @@
+import time
+import pybullet as p
+import pybullet_data as pd
+useMaximalCoordinatesA = True
+useMaximalCoordinatesB = True
+p.connect(p.GUI)
+p.setAdditionalSearchPath(pd.getDataPath())
+cube=p.loadURDF("cube_rotate.urdf",useMaximalCoordinates=useMaximalCoordinatesA)
+p.loadURDF("sphere2.urdf",[0,0,2],useMaximalCoordinates=useMaximalCoordinatesB)
+p.setGravity(0,0,-10)
+p.setJointMotorControl2(cube,0,p.VELOCITY_CONTROL,targetVelocity=1, force=100)
+while (1):
+  p.stepSimulation()
+  time.sleep(1./240.)
+