update DemonstrationRecorder.cs path and CHANGELOG.md

com.unity.ml-agents/CHANGELOG.md

  - Most fields on `RayPerceptionSensorComponent` can now be changed while the editor is in Play mode. The exceptions to this are fields that affect the number of observations.
  - Unused static methods from the `Utilities` class (ShiftLeft, ReplaceRange, AddRangeNoAlloc, and GetSensorFloatObservationSize) were removed.
 
-### Bugfixes
-- Fixed demonstration recording of experiences when the Agent is done. (#3463)
-- Fixed a bug with the rewards of multiple Agents in the gym interface (#3471, #3496)
-
 
 ## [0.14.1-preview] - 2020-02-25
 
 - Updated the `gail_config.yaml` to work with per-Agent steps (#3475)
+- Fixed demonstration recording of experiences when the Agent is done. (#3463)
+- Fixed a bug with the rewards of multiple Agents in the gym interface (#3471, #3496)
 
 
 ## [0.14.0-preview] - 2020-02-13

com.unity.ml-agents/Runtime/DemonstrationRecorder.cs

-using System.IO.Abstractions;
-using System.Text.RegularExpressions;
-using UnityEngine;
-using System.Collections.Generic;
-using MLAgents.Sensor;
-
-namespace MLAgents
-{
-    /// <summary>
-    /// Demonstration Recorder Component.
-    /// </summary>
-    [RequireComponent(typeof(Agent))]
-    [AddComponentMenu("ML Agents/Demonstration Recorder", (int)MenuGroup.Default)]
-    public class DemonstrationRecorder : MonoBehaviour
-    {
-        public bool record;
-        public string demonstrationName;
-        Agent m_RecordingAgent;
-        string m_FilePath;
-        DemonstrationStore m_DemoStore;
-        public const int MaxNameLength = 16;
-
-        void Start()
-        {
-            if (Application.isEditor && record)
-            {
-                InitializeDemoStore();
-            }
-        }
-
-        void Update()
-        {
-            if (Application.isEditor && record && m_DemoStore == null)
-            {
-                InitializeDemoStore();
-            }
-        }
-
-        /// <summary>
-        /// Creates demonstration store for use in recording.
-        /// </summary>
-        public void InitializeDemoStore(IFileSystem fileSystem = null)
-        {
-            m_RecordingAgent = GetComponent<Agent>();
-            m_DemoStore = new DemonstrationStore(fileSystem);
-            var behaviorParams = GetComponent<BehaviorParameters>();
-            demonstrationName = SanitizeName(demonstrationName, MaxNameLength);
-            m_DemoStore.Initialize(
-                demonstrationName,
-                behaviorParams.brainParameters,
-                behaviorParams.fullyQualifiedBehaviorName);
-            Monitor.Log("Recording Demonstration of Agent: ", m_RecordingAgent.name);
-        }
-
-        /// <summary>
-        /// Removes all characters except alphanumerics from demonstration name.
-        /// Shorten name if it is longer than the maxNameLength.
-        /// </summary>
-        public static string SanitizeName(string demoName, int maxNameLength)
-        {
-            var rgx = new Regex("[^a-zA-Z0-9 -]");
-            demoName = rgx.Replace(demoName, "");
-            // If the string is too long, it will overflow the metadata.
-            if (demoName.Length > maxNameLength)
-            {
-                demoName = demoName.Substring(0, maxNameLength);
-            }
-            return demoName;
-        }
-
-        /// <summary>
-        /// Forwards AgentInfo to Demonstration Store.
-        /// </summary>
-        public void WriteExperience(AgentInfo info, List<ISensor> sensors)
-        {
-            m_DemoStore?.Record(info, sensors);
-        }
-
-        public void Close()
-        {
-            if (m_DemoStore != null)
-            {
-                m_DemoStore.Close();
-                m_DemoStore = null;
-            }
-        }
-
-        /// <summary>
-        /// Closes Demonstration store.
-        /// </summary>
-        void OnApplicationQuit()
-        {
-            if (Application.isEditor && record)
-            {
-                Close();
-            }
-        }
-    }
-}