constrain x tennis

Project/Assets/ML-Agents/Examples/Tennis/Scripts/TennisAgent.cs

         Quaternion deltaRotation = Quaternion.Euler(zAxis * rotateZ);
         m_AgentRb.MoveRotation(m_AgentRb.rotation * deltaRotation);
 
-        if (invertX && transform.position.x - transform.parent.transform.position.x < -m_InvertMult ||
-            !invertX && transform.position.x - transform.parent.transform.position.x > -m_InvertMult)
+        if (invertX && transform.position.x - transform.parent.transform.position.x < -m_InvertMult * 5f ||
+            !invertX && transform.position.x - transform.parent.transform.position.x > -m_InvertMult * 5f)
-            transform.position = new Vector3(-m_InvertMult + transform.parent.transform.position.x,
+            transform.position = new Vector3(-m_InvertMult * 5f + transform.parent.transform.position.x,
                 transform.position.y,
                 transform.position.z);
         }

config/ppo/Tennis.yaml

         gamma: 0.995
     self_play:
       window: 10
-      play_against_latest_model_ratio: 0.5
+      play_against_latest_model_ratio: 0.0
       save_steps: 100000
       swap_steps: 2000
       team_change: 200000