clean up the code in Ball3DDecision

unity-environment/Assets/ML-Agents/Examples/3DBall/Scripts/Ball3DDecision.cs

 
 public class Ball3DDecision : MonoBehaviour, Decision
 {
+	public float rotationSpeed = 2f;
-            List<float> ret = new List<float>();
-            if (state[2] < 0 || state[5] < 0)
-            {
-                ret.Add(state[5]);
-            }
-            else
-            {
-                ret.Add(state[5]);
-            }
-            if (state[3] < 0 || state[7] < 0)
-            {
-                ret.Add(-state[7]);
-            }
-            else
-            {
-                ret.Add(-state[7]);
-            }
-            return ret.ToArray();
-
+            List<float> act = new List<float>();
+            //state[5] is the velocity of the ball in the x orientation. We use this number to control the Platform's z axis rotation speed, 
+            //so that the Platform is tilted in the x orientation correspondingly. 
+            act.Add(state[5] * rotationSpeed);
+            //state[7] is the velocity of the ball in the z orientation. We use this number to control the Platform's x axis rotation speed,  
+            //so that the Platform is tilted in the z orientation correspondingly. 
+            act.Add(-state[7] * rotationSpeed);
+            return act.ToArray();
+		//If the vector action space type is discrete, then we don't do anything. 	
         else
         {
             return new float[1]{ 1f };

unity-environment/Assets/ML-Agents/Scripts/Agent.cs

     ///</summary>
     private float reward;
 
-    /// Whether or not the agent requests an action
+    /// Whether or not the agent requests an action.
-    /// Whether or not the agent requests a decision
+    /// Whether or not the agent requests a decision.
     private bool requestDecision;
 
     /// <summary> 
     private int id;
 
     /// <summary>
-	/// Unity method called when the agent is instantiated or set to active.
+    /// Unity method called when the agent is instantiated or set to active.
     /// </summary>
     private void OnEnable()
     {