Modified some namespaces (#3533)

* Added the MLAgents.Demonstrations namespace

* Added the MLAgents.Editor namespace

* Overrided the .demo.meta files due to the change in namespace

* More namespace changes

* Added the sidechannels namespace

* Modified changelog and migrating docs

Project/Assets/ML-Agents/Examples/3DBall/Scripts/Ball3DAgent.cs

 using UnityEngine;
 using MLAgents;
 using MLAgents.Sensors;
+using MLAgents.SideChannels;
 
 public class Ball3DAgent : Agent
 {

Project/Assets/ML-Agents/Examples/3DBall/Scripts/Ball3DHardAgent.cs

 using UnityEngine;
 using MLAgents;
 using MLAgents.Sensors;
+using MLAgents.SideChannels;
 
 public class Ball3DHardAgent : Agent
 {

Project/Assets/ML-Agents/Examples/Bouncer/Scripts/BouncerAgent.cs

 using UnityEngine;
 using MLAgents;
 using MLAgents.Sensors;
+using MLAgents.SideChannels;
 
 public class BouncerAgent : Agent
 {

Project/Assets/ML-Agents/Examples/GridWorld/Scripts/GridArea.cs

 using UnityEngine;
 using System.Linq;
 using MLAgents;
+using MLAgents.SideChannels;
 
 
 public class GridArea : MonoBehaviour

Project/Assets/ML-Agents/Examples/SharedAssets/Scripts/ModelOverrider.cs

 using Barracuda;
 using System.IO;
 using MLAgents;
+using MLAgents.Policies;
 
 namespace MLAgentsExamples
 {

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

 using System;
 using UnityEngine;
 using MLAgents;
+using MLAgents.Policies;
 
 public class AgentSoccer : Agent
 {

Project/Assets/ML-Agents/Examples/Tennis/Scripts/TennisAgent.cs

 using UnityEngine.UI;
 using MLAgents;
 using MLAgents.Sensors;
+using MLAgents.SideChannels;
 
 public class TennisAgent : Agent
 {

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

 using MLAgents;
 using MLAgentsExamples;
 using MLAgents.Sensors;
+using MLAgents.SideChannels;
 
 public class WalkerAgent : Agent
 {

com.unity.ml-agents/CHANGELOG.md

  Note that Barracuda 0.6.0 or later is required to import the `.onnx` files properly
  - Multi-GPU training and the `--multi-gpu` option has been removed temporarily. (#3345)
  - All Sensor related code has been moved to the namespace `MLAgents.Sensors`.
+ - All SideChannel related code has been moved to the namespace `MLAgents.SideChannels`.
 
 ### Minor Changes
  - Monitor.cs was moved to Examples. (#3372)

com.unity.ml-agents/Editor/BehaviorParametersEditor.cs

 using MLAgents.Sensors;
 using UnityEditor;
 using Barracuda;
+using MLAgents.Policies;
 
 namespace MLAgents.Editor
 {
             }
             if (brainParameters != null)
             {
-                var failedChecks = InferenceBrain.BarracudaModelParamLoader.CheckModel(
+                var failedChecks = Inference.BarracudaModelParamLoader.CheckModel(
                     barracudaModel, brainParameters, sensorComponents);
                 foreach (var check in failedChecks)
                 {

com.unity.ml-agents/Editor/BrainParametersDrawer.cs

 using UnityEngine;
 using UnityEditor;
+using MLAgents.Policies;
 
 namespace MLAgents.Editor
 {

com.unity.ml-agents/Editor/DemonstrationDrawer.cs

 using System.Text;
-using MLAgents;
+using MLAgents.Policies;
 
 
 namespace MLAgents.Editor

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

 #if UNITY_EDITOR
 using UnityEditor;
 #endif
-using MLAgents.InferenceBrain;
+using MLAgents.Inference;
+using MLAgents.Policies;
+using MLAgents.SideChannels;
 using Barracuda;
 
 /**

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

 using Barracuda;
 using MLAgents.Sensors;
 using MLAgents.Demonstrations;
+using MLAgents.Policies;
 
 namespace MLAgents
 {

com.unity.ml-agents/Runtime/Communicator/GrpcExtensions.cs

 using System.Runtime.CompilerServices;
 using MLAgents.Sensors;
 using MLAgents.Demonstrations;
+using MLAgents.Policies;
+
 
 [assembly: InternalsVisibleTo("Unity.ML-Agents.Editor")]
 [assembly: InternalsVisibleTo("Unity.ML-Agents.Editor.Tests")]

com.unity.ml-agents/Runtime/Communicator/ICommunicator.cs

 using System;
 using System.Collections.Generic;
-using UnityEngine;
+using MLAgents.Policies;
+using MLAgents.SideChannels;
 
 namespace MLAgents
 {

com.unity.ml-agents/Runtime/Communicator/RpcCommunicator.cs

 using UnityEngine;
 using MLAgents.CommunicatorObjects;
 using MLAgents.Sensors;
+using MLAgents.Policies;
+using MLAgents.SideChannels;
 using System.IO;
 using Google.Protobuf;
 

com.unity.ml-agents/Runtime/Demonstrations/Demonstration.cs

 using System;
 using UnityEngine;
+using MLAgents.Policies;
 
 namespace MLAgents.Demonstrations
 {

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

 using System.Text.RegularExpressions;
 using UnityEngine;
 using System.IO;
+using MLAgents.Policies;
 
 namespace MLAgents.Demonstrations
 {

com.unity.ml-agents/Runtime/Demonstrations/DemonstrationWriter.cs

 using Google.Protobuf;
 using System.Collections.Generic;
 using MLAgents.Sensors;
+using MLAgents.Policies;
 
 namespace MLAgents.Demonstrations
 {

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

 using System;
 using System.Collections.Generic;
 using System.Linq;
+using MLAgents.Policies;
 
 namespace MLAgents
 {

com.unity.ml-agents/Runtime/SideChannels/EngineConfigurationChannel.cs

 using System;
 using UnityEngine;
 
-namespace MLAgents
+namespace MLAgents.SideChannels
 {
     /// <summary>
     /// Side channel that supports modifying attributes specific to the Unity Engine.

com.unity.ml-agents/Runtime/SideChannels/FloatPropertiesChannel.cs

 using System;
 using System.Text;
 
-namespace MLAgents
+namespace MLAgents.SideChannels
 {
     /// <summary>
     /// Interface for managing a collection of float properties keyed by a string variable.

com.unity.ml-agents/Runtime/SideChannels/RawBytesChannel.cs

 using System.Collections.Generic;
 using System;
 
-namespace MLAgents
+namespace MLAgents.SideChannels
 {
     /// <summary>
     /// Side channel for managing raw bytes of data. It is up to the clients of this side channel

com.unity.ml-agents/Runtime/SideChannels/SideChannel.cs

 using System.Collections.Generic;
 using System;
 
-namespace MLAgents
+namespace MLAgents.SideChannels
 {
     /// <summary>
     /// Side channels provide an alternative mechanism of sending/receiving data from Unity

com.unity.ml-agents/Runtime/Sensors/WriteAdapter.cs

 using System;
 using System.Collections.Generic;
 using Barracuda;
-using MLAgents.InferenceBrain;
+using MLAgents.Inference;
 
 namespace MLAgents.Sensors
 {

com.unity.ml-agents/Runtime/Policies/BarracudaPolicy.cs

-using UnityEngine;
-using MLAgents.InferenceBrain;
-using System;
+using MLAgents.Inference;
-namespace MLAgents
+namespace MLAgents.Policies
 {
     /// <summary>
     /// Where to perform inference.

com.unity.ml-agents/Runtime/Policies/BehaviorParameters.cs

 using UnityEngine;
 using UnityEngine.Serialization;
 
-namespace MLAgents
+namespace MLAgents.Policies
 {
     /// <summary>
     /// The Factory to generate policies.

com.unity.ml-agents/Runtime/Policies/BrainParameters.cs

 using System;
 using UnityEngine;
 
-namespace MLAgents
+namespace MLAgents.Policies
 {
     /// <summary>
     /// Whether the action space is discrete or continuous.

com.unity.ml-agents/Runtime/Policies/HeuristicPolicy.cs

 using System;
 using MLAgents.Sensors;
 
-namespace MLAgents
+namespace MLAgents.Policies
 {
     /// <summary>
     /// The Heuristic Policy uses a hards coded Heuristic method

com.unity.ml-agents/Runtime/Policies/IPolicy.cs

 using System.Collections.Generic;
 using MLAgents.Sensors;
 
-namespace MLAgents
+namespace MLAgents.Policies
 {
     /// <summary>
     /// IPolicy is connected to a single Agent. Each time the agent needs

com.unity.ml-agents/Runtime/Policies/RemotePolicy.cs

 using System;
 using MLAgents.Sensors;
 
-namespace MLAgents
+namespace MLAgents.Policies
 {
     /// <summary>
     /// The Remote Policy only works when training.

com.unity.ml-agents/Runtime/Inference/ApplierImpl.cs

 using System.Collections.Generic;
 using System.Linq;
 using Barracuda;
-using MLAgents.InferenceBrain.Utils;
+using MLAgents.Inference.Utils;
-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     /// <summary>
     /// The Applier for the Continuous Action output tensor. Tensor is assumed to contain the

com.unity.ml-agents/Runtime/Inference/BarracudaModelParamLoader.cs

 using System.Linq;
 using Barracuda;
 using MLAgents.Sensors;
+using MLAgents.Policies;
-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     /// <summary>
     /// Prepares the Tensors for the Learning Brain and exposes a list of failed checks if Model

com.unity.ml-agents/Runtime/Inference/GeneratorImpl.cs

 using System.Collections.Generic;
 using System;
 using Barracuda;
-using MLAgents.InferenceBrain.Utils;
+using MLAgents.Inference.Utils;
-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     /// <summary>
     /// Reshapes a Tensor so that its first dimension becomes equal to the current batch size

com.unity.ml-agents/Runtime/Inference/ModelRunner.cs

 using Barracuda;
 using UnityEngine.Profiling;
 using MLAgents.Sensors;
+using MLAgents.Policies;
-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     internal struct AgentInfoSensorsPair
     {

com.unity.ml-agents/Runtime/Inference/TensorApplier.cs

 using System.Collections.Generic;
 using Barracuda;
-using System;
+using MLAgents.Policies;
-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     /// <summary>
     /// Mapping between the output tensor names and the method that will use the

com.unity.ml-agents/Runtime/Inference/TensorGenerator.cs

 using Barracuda;
 using MLAgents.Sensors;
 
-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     /// <summary>
     /// Mapping between Tensor names and generators.

com.unity.ml-agents/Runtime/Inference/TensorNames.cs

-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     /// <summary>
     /// Contains the names of the input and output tensors for the Inference Brain.

com.unity.ml-agents/Runtime/Inference/TensorProxy.cs

 using System;
 using System.Collections.Generic;
 using Barracuda;
-using MLAgents.InferenceBrain.Utils;
+using MLAgents.Inference.Utils;
-namespace MLAgents.InferenceBrain
+namespace MLAgents.Inference
 {
     /// <summary>
     /// Tensor - A class to encapsulate a Tensor used for inference.

com.unity.ml-agents/Runtime/Inference/Utils/Multinomial.cs

-namespace MLAgents.InferenceBrain.Utils
+namespace MLAgents.Inference.Utils
 {
     /// <summary>
     /// Multinomial - Draws samples from a multinomial distribution given a (potentially unscaled)

com.unity.ml-agents/Runtime/Inference/Utils/RandomNormal.cs

 using System;
 
-namespace MLAgents.InferenceBrain.Utils
+namespace MLAgents.Inference.Utils
 {
     /// <summary>
     /// RandomNormal - A random number generator that produces normally distributed random

com.unity.ml-agents/Tests/Editor/DemonstrationTests.cs

 using MLAgents.CommunicatorObjects;
 using MLAgents.Sensors;
 using MLAgents.Demonstrations;
+using MLAgents.Policies;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/DiscreteActionOutputApplierTest.cs

 using Barracuda;
 using NUnit.Framework;
 using UnityEngine;
-using MLAgents.InferenceBrain;
-using MLAgents.InferenceBrain.Utils;
+using MLAgents.Inference;
+using MLAgents.Inference.Utils;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/EditModeTestActionMasker.cs

 using NUnit.Framework;
+using MLAgents.Policies;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/EditModeTestInternalBrainTensorApplier.cs

 using System.Collections.Generic;
 using NUnit.Framework;
-using UnityEngine;
-using MLAgents.InferenceBrain;
-using System;
+using MLAgents.Inference;
+using MLAgents.Policies;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/EditModeTestInternalBrainTensorGenerator.cs

 using Barracuda;
 using NUnit.Framework;
 using UnityEngine;
-using MLAgents.InferenceBrain;
-
+using MLAgents.Inference;
+using MLAgents.Policies;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/MLAgentsEditModeTest.cs

 using System.Reflection;
 using System.Collections.Generic;
 using MLAgents.Sensors;
+using MLAgents.Policies;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/ModelRunnerTest.cs

 using UnityEngine;
 using UnityEditor;
 using Barracuda;
-using MLAgents.InferenceBrain;
+using MLAgents.Inference;
+using MLAgents.Policies;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/MultinomialTest.cs

 using NUnit.Framework;
-using MLAgents.InferenceBrain.Utils;
+using MLAgents.Inference.Utils;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/ParameterLoaderTest.cs

 using UnityEngine;
 using UnityEditor;
 using Barracuda;
-using MLAgents.InferenceBrain;
+using MLAgents.Inference;
+using MLAgents.Policies;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/RandomNormalTest.cs

 using System;
 using NUnit.Framework;
-using MLAgents.InferenceBrain.Utils;
+using MLAgents.Inference.Utils;
 
 namespace MLAgents.Tests
 {

com.unity.ml-agents/Tests/Editor/Sensor/WriterAdapterTests.cs

 using NUnit.Framework;
 using MLAgents.Sensors;
 using Barracuda;
-using MLAgents.InferenceBrain;
+using MLAgents.Inference;
 
 
 namespace MLAgents.Tests

com.unity.ml-agents/Tests/Editor/SideChannelTests.cs

 using NUnit.Framework;
 using System.Collections.Generic;
 using System.Text;
+using MLAgents.SideChannels;
 
 namespace MLAgents.Tests
 {
         {
             public List<int> messagesReceived = new List<int>();
 
-            public TestSideChannel() { 
-                ChannelId = new Guid("6afa2c06-4f82-11ea-b238-784f4387d1f7"); 
+            public TestSideChannel() {
+                ChannelId = new Guid("6afa2c06-4f82-11ea-b238-784f4387d1f7");
             }
 
             public override void OnMessageReceived(byte[] data)

com.unity.ml-agents/Tests/Editor/TensorUtilsTest.cs

 using System;
 using Barracuda;
-using MLAgents.InferenceBrain;
-using MLAgents.InferenceBrain.Utils;
+using MLAgents.Inference;
+using MLAgents.Inference.Utils;
 using NUnit.Framework;
 
 namespace MLAgents.Tests

docs/Migrating.md

 * The `SetMask` was renamed to `SetMask` method must now be called on the `DiscreteActionMasker` argument of the `CollectDiscreteActionMasks` virtual method.
 * We consolidated our API for `DiscreteActionMasker`. `SetMask` takes two arguments : the branch index and the list of masked actions for that branch.
 * The `Monitor` class has been moved to the Examples Project. (It was prone to errors during testing)
-* The `MLAgents.Sensor` namespace has been removed. All sensors now belong to the `MLAgents` namespace.
+* The `MLAgents.Sensors` namespace has been introduced. All sensors classes are part of the `MLAgents.Sensors` namespace.
+* The `MLAgents.SideChannels` namespace has been introduced. All side channel classes are part of the `MLAgents.SideChannels` namespace.
 * The interface for `RayPerceptionSensor.PerceiveStatic()` was changed to take an input class and write to an output class, and the method was renamed to `Perceive()`.
 * The `SetMask` method must now be called on the `DiscreteActionMasker` argument of the `CollectDiscreteActionMasks` method.
 * The method `GetStepCount()` on the Agent class has been replaced with the property getter `StepCount`

com.unity.ml-agents/Runtime/Inference.meta

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