add hh

Project/Assets/ML-Agents/Examples/Walker/Scripts/WalkerAgent.cs

                 $" head.forward: {head.forward}"
             );
         }
+        
+        // c. Encourage head height.
+        var headHeightOverFeetReward =
+            Mathf.Clamp01(((head.position.y - footL.position.y) + (head.position.y - footR.position.y))/ 10); //Should normalize to ~1
-        AddReward(matchSpeedReward * lookAtTargetReward);
+        AddReward(matchSpeedReward * lookAtTargetReward * headHeightOverFeetReward);
+//        AddReward(matchSpeedReward * lookAtTargetReward);
     }
 
     //Returns the average velocity of all of the body parts