added bounce obs to agent/more downward force on ball

Project/Assets/ML-Agents/Examples/Tennis/Prefabs/TennisArea.prefab

   m_Name: 
   m_EditorClassIdentifier: 
   m_BrainParameters:
-    vectorObservationSize: 9
+    vectorObservationSize: 10
-  m_Model: {fileID: 11400000, guid: d6c5e749e4ceb4cf79640a5955706d3d, type: 3}
+  m_Model: {fileID: 11400000, guid: cb78d17a8251c4ae2b8d706543d43ffa, type: 3}
   m_InferenceDevice: 0
   m_BehaviorType: 0
   m_BehaviorName: Tennis
   m_EditorClassIdentifier: 
   DecisionPeriod: 5
   TakeActionsBetweenDecisions: 1
-  offsetStep: 0
 --- !u!1 &1194790474478638
 GameObject:
   m_ObjectHideFlags: 0
   m_Name: 
   m_EditorClassIdentifier: 
   areaObject: {fileID: 1541947554534326}
+  lastFloorHit: 0
 --- !u!1 &1299636753784036
 GameObject:
   m_ObjectHideFlags: 0
   m_Name: 
   m_EditorClassIdentifier: 
   m_BrainParameters:
-    vectorObservationSize: 9
+    vectorObservationSize: 10
-  m_Model: {fileID: 11400000, guid: d6c5e749e4ceb4cf79640a5955706d3d, type: 3}
+  m_Model: {fileID: 11400000, guid: cb78d17a8251c4ae2b8d706543d43ffa, type: 3}
   m_InferenceDevice: 0
   m_BehaviorType: 0
   m_BehaviorName: Tennis
   m_EditorClassIdentifier: 
   DecisionPeriod: 5
   TakeActionsBetweenDecisions: 1
-  offsetStep: 0
 --- !u!1 &1969551055586186
 GameObject:
   m_ObjectHideFlags: 0

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

             FloorBHit
         }
 
-    FloorHit m_LastFloorHit;
+    [HideInInspector]
+    public FloorHit lastFloorHit;
 
     TennisArea m_Area;
     TennisAgent m_AgentA;
 
     public void ResetPoint()
     {
-        m_LastFloorHit = FloorHit.Service;
+        lastFloorHit = FloorHit.Service;
         m_LastAgentHit = -1;
     }
 
             if (collision.gameObject.name == "wallA")
             {
                 // Agent A hits into wall or agent B hit a winner
-                if (m_LastAgentHit == 0 || m_LastFloorHit == FloorHit.FloorAHit)
+                if (m_LastAgentHit == 0 || lastFloorHit == FloorHit.FloorAHit)
                 {
                     AgentBWins();
                 }
             else if (collision.gameObject.name == "wallB")
             {
                 // Agent B hits into wall or agent A hit a winner
-                if (m_LastAgentHit == 1 || m_LastFloorHit == FloorHit.FloorBHit)
+                if (m_LastAgentHit == 1 || lastFloorHit == FloorHit.FloorBHit)
                 {
                     AgentAWins();
                 }
             else if (collision.gameObject.name == "floorA")
             {
                 // Agent A hits into floor, double bounce or service
-                if (m_LastAgentHit == 0 || m_LastFloorHit == FloorHit.FloorAHit || m_LastFloorHit == FloorHit.Service)
+                if (m_LastAgentHit == 0 || lastFloorHit == FloorHit.FloorAHit || lastFloorHit == FloorHit.Service)
-                    m_LastFloorHit = FloorHit.FloorAHit;
+                    lastFloorHit = FloorHit.FloorAHit;
-                if (m_LastAgentHit == 1 || m_LastFloorHit == FloorHit.FloorBHit || m_LastFloorHit == FloorHit.Service)
+                if (m_LastAgentHit == 1 || lastFloorHit == FloorHit.FloorBHit || lastFloorHit == FloorHit.Service)
-                    m_LastFloorHit = FloorHit.FloorBHit;
+                    lastFloorHit = FloorHit.FloorBHit;
                 }
             }
         }
             {
 
                 m_LastAgentHit = 0;
-                m_LastFloorHit = FloorHit.FloorHitUnset;
+                lastFloorHit = FloorHit.FloorHitUnset;
             }
         }
         else if (collision.gameObject.name == "AgentB")
             else
             {
                 m_LastAgentHit = 1;
-                m_LastFloorHit = FloorHit.FloorHitUnset;
+                lastFloorHit = FloorHit.FloorHitUnset;
             }
         }
     }

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

     Text m_TextComponent;
     Rigidbody m_AgentRb;
     Rigidbody m_BallRb;
+    HitWall m_BallScript;
     TennisArea m_Area;
     float m_InvertMult;
     FloatPropertiesChannel m_ResetParams;
     {
         m_AgentRb = GetComponent<Rigidbody>();
         m_BallRb = ball.GetComponent<Rigidbody>();
+        m_BallScript = ball.GetComponent<HitWall>();
         m_Area = myArea.GetComponent<TennisArea>();
         var canvas = GameObject.Find(k_CanvasName);
         GameObject scoreBoard;
         sensor.AddObservation(m_BallRb.velocity.y);
 
         sensor.AddObservation(m_InvertMult * gameObject.transform.rotation.z);
+        
+        sensor.AddObservation(System.Convert.ToInt32(m_BallScript.lastFloorHit == HitWall.FloorHit.FloorHitUnset));
     }
 
     public override void OnActionReceived(float[] vectorAction)

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

     public GameObject agentB;
     Rigidbody m_BallRb;
     HitWall m_BallScript;
-    Vector3 down = new Vector3(0f, -15f, 0f);
+    Vector3 down = new Vector3(0f, -45f, 0f);
 
     // Use this for initialization
     void Start()
     void FixedUpdate()
     {
         m_BallRb.AddForce(down);
-        var rgV = m_BallRb.velocity;
-        m_BallRb.velocity = new Vector3(Mathf.Clamp(rgV.x, -30f, 30f), Mathf.Clamp(rgV.y, -35f, 35f), rgV.z);
+        //var rgV = m_BallRb.velocity;
+        //Debug.Log(rgV.x);
+        //m_BallRb.velocity = new Vector3(Mathf.Clamp(rgV.x, -30f, 30f), Mathf.Clamp(rgV.y, -35f, 35f), rgV.z);
     }
 }