Make a serialization upgrade path for maxStep. (#3424)

- Test comment out as we need a package that is only verified for 2019.2.
5 年前 · 44f88933
--- a/Project/ProjectSettings/EditorBuildSettings.asset
+++ b/Project/ProjectSettings/EditorBuildSettings.asset
 EditorBuildSettings:
  m_ObjectHideFlags: 0
  serializedVersion: 2
-  m_Scenes: []
+  m_Scenes:
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+    path: Packages/com.unity.ml-agents/Tests/Runtime/SerializeTestScene.unity
+    guid: 60783bd849bd242eeb66243542762b23
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--- a/com.unity.ml-agents/Runtime/Agent.cs
+++ b/com.unity.ml-agents/Runtime/Agent.cs
 using System.Collections.Generic;
 using UnityEngine;
 using Barracuda;
+using UnityEditor;
 using UnityEngine.Serialization;

 namespace MLAgents
        "docs/Learning-Environment-Design-Agents.md")]
    [Serializable]
    [RequireComponent(typeof(BehaviorParameters))]
-    public abstract class Agent : MonoBehaviour
+    public abstract class Agent : MonoBehaviour, ISerializationCallbackReceiver
+
+        /// This code is here to make the upgrade path for users using maxStep
+        /// easier.  We will hook into the Serialization code and make sure that
+        /// agentParameters.maxStep and this.maxStep are in sync.
+        [Serializable]
+        internal struct AgentParameters
+        {
+            public int maxStep;
+        }
+
+        [SerializeField] [HideInInspector]
+        internal AgentParameters agentParameters;
+        [SerializeField] [HideInInspector]
+        internal bool hasUpgradedFromAgentParameters;

        /// <summary>
        /// The maximum number of steps the agent takes before being done.
            LazyInitialize();
        }

+
+        public void OnBeforeSerialize()
+        {
+            if (maxStep == 0 && maxStep != agentParameters.maxStep && !hasUpgradedFromAgentParameters)
+            {
+                maxStep = agentParameters.maxStep;
+
+            }
+            hasUpgradedFromAgentParameters = true;
+        }
+
+        public void OnAfterDeserialize()
+        {
+            if (maxStep == 0 && maxStep != agentParameters.maxStep && !hasUpgradedFromAgentParameters)
+            {
+                maxStep = agentParameters.maxStep;
+            }
+            hasUpgradedFromAgentParameters = true;
+        }
+
        /// Helper method for the <see cref="OnEnable"/> event, created to
        /// facilitate testing.
        public void LazyInitialize()
            ResetData();
            InitializeAgent();
            InitializeSensors();
-
        }

        /// Monobehavior function that is called when the attached GameObject
--- a/com.unity.ml-agents/Tests/Runtime.meta
+++ b/com.unity.ml-agents/Tests/Runtime.meta
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--- a/com.unity.ml-agents/Tests/Runtime/SerializationTest.cs
+++ b/com.unity.ml-agents/Tests/Runtime/SerializationTest.cs
+// using System.Collections;
+// using NUnit.Framework;
+// #if UNITY_EDITOR
+// using UnityEditor.SceneManagement;
+// using UnityEngine.TestTools;
+// #endif
+// using UnityEngine;
+// using UnityEngine.SceneManagement;
+//
+// namespace Tests
+// {
+//     [TestFixture]
+//     public class SerializationTest
+//     {
+//
+//         [SetUp]
+//         public void Setup()
+//         {
+//             SceneManager.LoadScene("Packages/com.unity.ml-agents/Tests/Runtime/SerializeTestScene");
+//         }
+//
+//         /// <summary>
+//         /// Test that the serialized agent in the scene, which has its agent parameter value serialized,
+//         /// properly deserializes it to Agent.maxStep.
+//         /// </summary>
+//         [UnityTest]
+//         public IEnumerator SerializationTestSimplePasses()
+//         {
+//             // Use the Assert class to test conditions
+//             var gameObjects = SceneManager.GetActiveScene().GetRootGameObjects();
+//             if (SceneManager.GetActiveScene().name != "SerializeTestScene")
+//             {
+//                 yield return null;
+//             }
+//
+//             GameObject agent = null;
+//             foreach (var go in gameObjects)
+//             {
+//                 if (go.name == "Agent")
+//                 {
+//                     agent = go;
+//                     break;
+//                 }
+//             }
+//             Assert.NotNull(agent);
+//             var agentComponent = agent.GetComponent<SerializeAgent>();
+//             Assert.True(agentComponent.maxStep == 5000);
+//
+//         }
+//     }
+// }
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--- a/com.unity.ml-agents/Tests/Runtime/SerializeAgent.cs
+++ b/com.unity.ml-agents/Tests/Runtime/SerializeAgent.cs
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using MLAgents;
+
+public class SerializeAgent : Agent
+{
+    public override float[] Heuristic()
+    {
+        return new[] {0f};
+    }
+}
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