using ROS
using Gazebo plugin
explaining construct of Gazebo : https://u.cs.biu.ac.il/~yehoshr1/89-685/Fall2015/ROS_Lesson10.pdf making sdf file : http://gazebosim.org/tutorials?tut=simple_gripper torque control : http://answers.gazebosim.org/question/1850/how-to-use-torque-to-control-joint/ control plugin : http://gazebosim.org/tutorials?cat=guided_i&tut=guided_i5 adding ROS : http://gazebosim.org/tutorials?cat=guided_i&tut=guided_i6
using Vrep