Movement takes mass and accel into account

Author: shariqiqbal2810

multiagent/core.py

@@ -207,7 +207,7 @@ def apply_action_force(self, p_force):
  for i,agent in enumerate(self.agents):
  if agent.movable:
  noise = np.random.randn(*agent.action.u.shape) * agent.u_noise if agent.u_noise else 0.0
- p_force[i] = agent.action.u + noise 
+ p_force[i] = (agent.mass * agent.accel if agent.accel is not None else agent.mass) * agent.action.u + noise
  return p_force
 
  # gather physical forces acting on entities