change reward function: stress less on action

Project/Assets/ML-Agents/Examples/Reacher/Scripts/NewReacherAgent.cs

         torqueZ = Mathf.Clamp(vectorAction[3], -1f, 1f) * 150f;
         m_RbB.AddTorque(new Vector3(torqueX, 0f, torqueZ));
 
-        AddReward( - 0.005f * (vectorAction[0] * vectorAction[0] 
+        AddReward( - 0.001f * (vectorAction[0] * vectorAction[0] 
                 + vectorAction[1] * vectorAction[1] 
                 + vectorAction[2] * vectorAction[2] 
                 + vectorAction[3] * vectorAction[3] 
     {
         if ((goal.transform.position - hand.transform.position).magnitude > 3.5f)
         {
-            AddReward(-0.001f);
+            AddReward(-0.002f);
+        // Debug.Log((goal.transform.position - hand.transform.position).magnitude);
         var radians = m_GoalDegree * Mathf.PI / 180f;
         var goalX = 8f * Mathf.Cos(radians);
         var goalY = 8f * Mathf.Sin(radians);

Project/Assets/ML-Agents/Examples/Reacher/Scripts/ReacherAgent.cs

         torqueZ = Mathf.Clamp(vectorAction[3], -1f, 1f) * 150f;
         m_RbB.AddTorque(new Vector3(torqueX, 0f, torqueZ));
 
-        AddReward( - 0.005f * (vectorAction[0] * vectorAction[0] 
+        AddReward( - 0.001f * (vectorAction[0] * vectorAction[0] 
                 + vectorAction[1] * vectorAction[1] 
                 + vectorAction[2] * vectorAction[2] 
                 + vectorAction[3] * vectorAction[3] 
     {
         if ((goal.transform.position - hand.transform.position).magnitude > 3.5f)
         {
-            AddReward(-0.001f);
+            AddReward(-0.002f);
         }
         // AddReward( - 0.001f * (goal.transform.position - hand.transform.position).magnitude);
         // Debug.Log((goal.transform.position - hand.transform.position).magnitude);