two soccer reset parameter implementation ported over

UnitySDK/Assets/ML-Agents/Examples/Soccer/Scenes/SoccerTwos.unity

     timeScale: 2
     targetFrameRate: 60
   resetParameters:
-    resetParameters: []
+    resetParameters:
+    - key: ball_scale
+      value: 1
+    - key: gravity
+      value: 9.81
   brainStriker: {fileID: 11400000, guid: 29ed78b3e8fef4340b3a1f6954b88f18, type: 2}
   brainGoalie: {fileID: 11400000, guid: 090fa5a8588f5433bb7f878e6f5ac954, type: 2}
   redMaterial: {fileID: 2100000, guid: 776dd8b57653342839c3fb5f46ce664e, type: 2}

UnitySDK/Assets/ML-Agents/Examples/Soccer/Scripts/AgentSoccer.cs

 
     public enum Team
     {
-        Red, 
+        Red,
-        Striker, 
+        Striker,
-    
+
-    
+
     [HideInInspector]
     public Rigidbody agentRb;
     SoccerAcademy academy;
 
         var playerState = new PlayerState
         {
-            agentRB = agentRb, 
-            startingPos = transform.position, 
+            agentRB = agentRb,
+            startingPos = transform.position,
             agentScript = this,
         };
         area.playerStates.Add(playerState);
         transform.position = area.GetRandomSpawnPos(agentRole, team);
         agentRb.velocity = Vector3.zero;
         agentRb.angularVelocity = Vector3.zero;
+        SetResetParameters();
+    }
+
+    public void SetResetParameters()
+    {
         area.ResetBall();
     }
 }

UnitySDK/Assets/ML-Agents/Examples/Soccer/Scripts/SoccerAcademy.cs

     }
     public override void AcademyReset()
     {
-
+        Physics.gravity = new Vector3(0, -resetParameters["gravity"], 0);
     }
 
     public override void AcademyStep()

UnitySDK/Assets/ML-Agents/Examples/Soccer/Scripts/SoccerFieldArea.cs

 [System.Serializable]
 public class PlayerState
 {
-    public int playerIndex; 
-    public Rigidbody agentRB; 
-    public Vector3 startingPos; 
-    public AgentSoccer agentScript; 
+    public int playerIndex;
+    public Rigidbody agentRB;
+    public Vector3 startingPos;
+    public AgentSoccer agentScript;
     public float ballPosReward;
 }
 
     public GameObject ball;
     [HideInInspector]
     public Rigidbody ballRB;
-    public GameObject ground; 
+    public GameObject ground;
     public GameObject centerPitch;
     SoccerBallController ballController;
     public List<PlayerState> playerStates = new List<PlayerState>();
     public IEnumerator GoalScoredSwapGroundMaterial(Material mat, float time)
     {
         groundRenderer.material = mat;
-        yield return new WaitForSeconds(time); 
+        yield return new WaitForSeconds(time);
         groundRenderer.material = groundMaterial;
     }
 
         academy = FindObjectOfType<SoccerAcademy>();
-        groundRenderer = centerPitch.GetComponent<Renderer>(); 
+        groundRenderer = centerPitch.GetComponent<Renderer>();
         groundMaterial = groundRenderer.material;
         canResetBall = true;
         if (goalTextUI) { goalTextUI.SetActive(false); }
         {
             xOffset = xOffset * -1f;
         }
-        var randomSpawnPos = ground.transform.position + 
-                               new Vector3(xOffset, 0f, 0f) 
+        var randomSpawnPos = ground.transform.position +
+                               new Vector3(xOffset, 0f, 0f)
                                + (Random.insideUnitSphere * 2);
         randomSpawnPos.y = ground.transform.position.y + 2;
         return randomSpawnPos;
     {
-        var randomSpawnPos = ground.transform.position + 
-                             new Vector3(0f, 0f, 0f) 
+        var randomSpawnPos = ground.transform.position +
+                             new Vector3(0f, 0f, 0f)
                              + (Random.insideUnitSphere * 2);
         randomSpawnPos.y = ground.transform.position.y + 2;
         return randomSpawnPos;
         ball.transform.position = GetBallSpawnPosition();
         ballRB.velocity = Vector3.zero;
         ballRB.angularVelocity = Vector3.zero;
+
+        var ballScale = academy.resetParameters["ball_scale"];
+        ballRB.transform.localScale = new Vector3(ballScale, ballScale, ballScale);
     }
 }