Merge branch 'soccer-2v1' into asymm-envs

Project/Assets/ML-Agents/Examples/Soccer/Prefabs/StrikersVsGoalieField.prefab

   team: 0
   area: {fileID: 114559182131992928}
   position: 1
+  timePenalty: 0
   agentRb: {fileID: 0}
 --- !u!114 &114320493772006642
 MonoBehaviour:
   team: 1
   area: {fileID: 114559182131992928}
   position: 0
+  timePenalty: 0
   agentRb: {fileID: 0}
 --- !u!114 &114516244030127556
 MonoBehaviour:
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 65
-  m_IsActive: 0
+  m_IsActive: 1
 --- !u!4 &4320016866705494
 Transform:
   m_ObjectHideFlags: 0
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 65
-  m_IsActive: 0
+  m_IsActive: 1
 --- !u!4 &4422946662457316
 Transform:
   m_ObjectHideFlags: 0
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 65
-  m_IsActive: 0
+  m_IsActive: 1
 --- !u!4 &4816505641171472
 Transform:
   m_ObjectHideFlags: 0
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 7710644083894658244}
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
-  m_LocalPosition: {x: -1524, y: 160, z: 0}
-  m_LocalScale: {x: 50, y: 420, z: 820}
+  m_LocalPosition: {x: -1550, y: 150, z: 0}
+  m_LocalScale: {x: 100, y: 400, z: 800}
   m_Children: []
   m_Father: {fileID: 4109868016055942}
   m_RootOrder: 0
   team: 1
   area: {fileID: 114559182131992928}
   position: 0
+  timePenalty: 0
   agentRb: {fileID: 0}
 --- !u!114 &2562571719799803906
 MonoBehaviour:

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

             team = Team.Purple;
             m_Transform = new Vector3(transform.position.x + 4f, .5f, transform.position.z);
         }
+        m_Power = 2000f;
-            m_Power = 2000f;
-            m_Power = 3000f;
-            m_Power = 2000f;
             m_LateralSpeed = 0.3f;
             m_ForwardSpeed = 1.0f;
         }

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

         }
     }
 
-    public Vector3 GetBallSpawnPosition()
-    {
-        var randomSpawnPos = ground.transform.position +
-            new Vector3(0f, 0f, 0f);
-        randomSpawnPos.y = ground.transform.position.y + .5f;
-        return randomSpawnPos;
-    }
-
-        ball.transform.position = GetBallSpawnPosition();
+        ball.transform.position = ballStartingPos;
         ballRb.velocity = Vector3.zero;
         ballRb.angularVelocity = Vector3.zero;
 

config/trainer_config.yaml

     num_layers: 2
     self_play:
         window: 10
-        play_against_latest_model_ratio: 0.5
+        play_against_latest_model_ratio: 0.25
         save_steps: 50000
         swap_steps: 25000
         team_change: 200000
     num_layers: 2
     self_play:
         window: 10
-        play_against_latest_model_ratio: 0.5
+        play_against_latest_model_ratio: 0.25
         save_steps: 50000
         swap_steps: 100000
         team_change: 200000