public static void Start(double dt)
{
agx.agxSWIG.init();
sim_Instance = new agxSDK.Simulation(); //Initialize the simulation
sim_Instance.setUniformGravity(new agx.Vec3(0, -9.80665f, 0)); //set gravity in Y direction
sim_Instance.getDynamicsSystem().getTimeGovernor().setTimeStep(dt); // set timestep
}