move pybullet examples to Bullet/examples/pybullet/examples

examples/pybullet/examples/constraint.py

@@ -0,0 +1,24 @@
+import pybullet as p
+import time
+import math
+
+p.connect(p.GUI)
+
+p.loadURDF("plane.urdf")
+cubeId = p.loadURDF("cube_small.urdf",0,0,1)
+p.setGravity(0,0,-10)
+p.setRealTimeSimulation(1)
+cid = p.createConstraint(cubeId,-1,-1,-1,p.JOINT_FIXED,[0,0,0],[0,0,0],[0,0,1])
+prev=[0,0,1]
+a=-math.pi
+while 1:
+	a=a+0.01
+	if (a>math.pi):
+		a=-math.pi
+	time.sleep(.01)
+	p.setGravity(0,0,-10)
+	pivot=[a,0,1]
+	orn = p.getQuaternionFromEuler([a,0,0])
+	p.changeConstraint(cid,pivot,jointChildFrameOrientation=orn, maxForce=50)
+
+p.removeConstraint(cid)