Adding A* Algorythm and carpet roads

AR/Assets/AstarPathfindingProject/PackageTools/Editor.meta

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+fileFormatVersion: 2
+guid: 0cbdf52f81d0d4ce7860eab2a4d018cd
+folderAsset: yes
+timeCreated: 1500391729
+licenseType: Pro
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

AR/Assets/AstarPathfindingProject/PackageTools/Editor/EditorBase.cs

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+using UnityEditor;
+using UnityEngine;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Pathfinding {
+	/// <summary>Helper for creating editors</summary>
+	[CustomEditor(typeof(VersionedMonoBehaviour), true)]
+	[CanEditMultipleObjects]
+	public class EditorBase : Editor {
+		static System.Collections.Generic.Dictionary<string, string> cachedTooltips;
+		static System.Collections.Generic.Dictionary<string, string> cachedURLs;
+		Dictionary<string, SerializedProperty> props = new Dictionary<string, SerializedProperty>();
+		Dictionary<string, string> localTooltips = new Dictionary<string, string>();
+
+		static GUIContent content = new GUIContent();
+		static GUIContent showInDocContent = new GUIContent("Show in online documentation", "");
+		static GUILayoutOption[] noOptions = new GUILayoutOption[0];
+		public static System.Func<string> getDocumentationURL;
+
+		static void LoadMeta () {
+			if (cachedTooltips == null) {
+				var filePath = EditorResourceHelper.editorAssets + "/tooltips.tsv";
+
+				try {
+					cachedURLs = System.IO.File.ReadAllLines(filePath).Select(l => l.Split('\t')).Where(l => l.Length == 2).ToDictionary(l => l[0], l => l[1]);
+					cachedTooltips = new System.Collections.Generic.Dictionary<string, string>();
+				} catch {
+					cachedURLs = new System.Collections.Generic.Dictionary<string, string>();
+					cachedTooltips = new System.Collections.Generic.Dictionary<string, string>();
+				}
+			}
+		}
+
+		static string FindURL (System.Type type, string path) {
+			// Find the correct type if the path was not an immediate member of #type
+			while (true) {
+				var index = path.IndexOf('.');
+				if (index == -1) break;
+				var fieldName = path.Substring(0, index);
+				var remaining = path.Substring(index + 1);
+				var field = type.GetField(fieldName, System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic);
+				if (field != null) {
+					type = field.FieldType;
+					path = remaining;
+				} else {
+					// Could not find the correct field
+					return null;
+				}
+			}
+
+			// Find a documentation entry for the field, fall back to parent classes if necessary
+			while (type != null) {
+				var url = FindURL(type.FullName + "." + path);
+				if (url != null) return url;
+				type = type.BaseType;
+			}
+			return null;
+		}
+
+		static string FindURL (string path) {
+			LoadMeta();
+			string url;
+			cachedURLs.TryGetValue(path, out url);
+			return url;
+		}
+
+		static string FindTooltip (string path) {
+			LoadMeta();
+
+			string tooltip;
+			cachedTooltips.TryGetValue(path, out tooltip);
+			return tooltip;
+		}
+
+		string FindLocalTooltip (string path) {
+			string result;
+
+			if (!localTooltips.TryGetValue(path, out result)) {
+				var fullPath = target.GetType().Name + "." + path;
+				result = localTooltips[path] = FindTooltip(fullPath);
+			}
+			return result;
+		}
+
+		protected virtual void OnEnable () {
+			foreach (var target in targets) if (target != null) (target as IVersionedMonoBehaviourInternal).UpgradeFromUnityThread();
+		}
+
+		public sealed override void OnInspectorGUI () {
+			EditorGUI.indentLevel = 0;
+			serializedObject.Update();
+			try {
+				Inspector();
+			} catch (System.Exception e) {
+				Debug.LogException(e, target);
+			}
+			serializedObject.ApplyModifiedProperties();
+			if (targets.Length == 1 && (target as MonoBehaviour).enabled) {
+				var attr = target.GetType().GetCustomAttributes(typeof(UniqueComponentAttribute), true);
+				for (int i = 0; i < attr.Length; i++) {
+					string tag = (attr[i] as UniqueComponentAttribute).tag;
+					foreach (var other in (target as MonoBehaviour).GetComponents<MonoBehaviour>()) {
+						if (!other.enabled || other == target) continue;
+						if (other.GetType().GetCustomAttributes(typeof(UniqueComponentAttribute), true).Select(c => (c as UniqueComponentAttribute).tag == tag).Any()) {
+							EditorGUILayout.HelpBox("This component and " + other.GetType().Name + " cannot be used at the same time", MessageType.Warning);
+						}
+					}
+				}
+			}
+		}
+
+		protected virtual void Inspector () {
+			// Basically the same as DrawDefaultInspector, but with tooltips
+			bool enterChildren = true;
+
+			for (var prop = serializedObject.GetIterator(); prop.NextVisible(enterChildren); enterChildren = false) {
+				PropertyField(prop.propertyPath);
+			}
+		}
+
+		protected SerializedProperty FindProperty (string name) {
+			if (!props.TryGetValue(name, out SerializedProperty res)) res = props[name] = serializedObject.FindProperty(name);
+			if (res == null) throw new System.ArgumentException(name);
+			return res;
+		}
+
+		protected void Section (string label) {
+			EditorGUILayout.Separator();
+			EditorGUILayout.LabelField(label, EditorStyles.boldLabel);
+		}
+
+		protected void FloatField (string propertyPath, string label = null, string tooltip = null, float min = float.NegativeInfinity, float max = float.PositiveInfinity) {
+			PropertyField(propertyPath, label, tooltip);
+			Clamp(propertyPath, min, max);
+		}
+
+		protected void FloatField (SerializedProperty prop, string label = null, string tooltip = null, float min = float.NegativeInfinity, float max = float.PositiveInfinity) {
+			PropertyField(prop, label, tooltip);
+			Clamp(prop, min, max);
+		}
+
+		protected bool PropertyField (string propertyPath, string label = null, string tooltip = null) {
+			return PropertyField(FindProperty(propertyPath), label, tooltip, propertyPath);
+		}
+
+		protected bool PropertyField (SerializedProperty prop, string label = null, string tooltip = null) {
+			return PropertyField(prop, label, tooltip, prop.propertyPath);
+		}
+
+		bool PropertyField (SerializedProperty prop, string label, string tooltip, string propertyPath) {
+			content.text = label ?? prop.displayName;
+			content.tooltip = tooltip ?? FindTooltip(propertyPath);
+			var contextClick = IsContextClick();
+			EditorGUILayout.PropertyField(prop, content, true, noOptions);
+			// Disable context clicking on arrays (as Unity has its own very useful context menu for the array elements)
+			if (contextClick && !prop.isArray && Event.current.type == EventType.Used) CaptureContextClick(propertyPath);
+			return prop.propertyType == SerializedPropertyType.Boolean ? !prop.hasMultipleDifferentValues && prop.boolValue : true;
+		}
+
+		bool IsContextClick () {
+			// Capturing context clicks turned out to be a bad idea.
+			// It prevents things like reverting to prefab values and other nice things.
+			return false;
+			// return Event.current.type == EventType.ContextClick;
+		}
+
+		void CaptureContextClick (string propertyPath) {
+			var url = FindURL(target.GetType(), propertyPath);
+
+			if (url != null && getDocumentationURL != null) {
+				Event.current.Use();
+				var menu = new GenericMenu();
+				menu.AddItem(showInDocContent, false, () => Application.OpenURL(getDocumentationURL() + url));
+				menu.ShowAsContext();
+			}
+		}
+
+		protected void Popup (string propertyPath, GUIContent[] options, string label = null) {
+			var prop = FindProperty(propertyPath);
+
+			content.text = label ?? prop.displayName;
+			content.tooltip = FindTooltip(propertyPath);
+			var contextClick = IsContextClick();
+			EditorGUI.BeginChangeCheck();
+			EditorGUI.showMixedValue = prop.hasMultipleDifferentValues;
+			int newVal = EditorGUILayout.Popup(content, prop.propertyType == SerializedPropertyType.Enum ? prop.enumValueIndex : prop.intValue, options);
+			if (EditorGUI.EndChangeCheck()) {
+				if (prop.propertyType == SerializedPropertyType.Enum) prop.enumValueIndex = newVal;
+				else prop.intValue = newVal;
+			}
+			EditorGUI.showMixedValue = false;
+			if (contextClick && GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition)) CaptureContextClick(propertyPath);
+		}
+
+		protected void Mask (string propertyPath, string[] options, string label = null) {
+			var prop = FindProperty(propertyPath);
+
+			content.text = label ?? prop.displayName;
+			content.tooltip = FindTooltip(propertyPath);
+			var contextClick = IsContextClick();
+			EditorGUI.BeginChangeCheck();
+			EditorGUI.showMixedValue = prop.hasMultipleDifferentValues;
+			int newVal = EditorGUILayout.MaskField(content, prop.intValue, options);
+			if (EditorGUI.EndChangeCheck()) {
+				prop.intValue = newVal;
+			}
+			EditorGUI.showMixedValue = false;
+			if (contextClick && GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition)) CaptureContextClick(propertyPath);
+		}
+
+		protected void IntSlider (string propertyPath, int left, int right) {
+			var contextClick = IsContextClick();
+			var prop = FindProperty(propertyPath);
+
+			content.text = prop.displayName;
+			content.tooltip = FindTooltip(propertyPath);
+			EditorGUILayout.IntSlider(prop, left, right, content, noOptions);
+			if (contextClick && Event.current.type == EventType.Used) CaptureContextClick(propertyPath);
+		}
+
+		protected void Slider (string propertyPath, float left, float right) {
+			var contextClick = IsContextClick();
+			var prop = FindProperty(propertyPath);
+
+			content.text = prop.displayName;
+			content.tooltip = FindTooltip(propertyPath);
+			EditorGUILayout.Slider(prop, left, right, content, noOptions);
+			if (contextClick && Event.current.type == EventType.Used) CaptureContextClick(propertyPath);
+		}
+
+		protected void Clamp (SerializedProperty prop, float min, float max = float.PositiveInfinity) {
+			if (!prop.hasMultipleDifferentValues) prop.floatValue = Mathf.Clamp(prop.floatValue, min, max);
+		}
+
+		protected void Clamp (string name, float min, float max = float.PositiveInfinity) {
+			Clamp(FindProperty(name), min, max);
+		}
+
+		protected void ClampInt (string name, int min, int max = int.MaxValue) {
+			var prop = FindProperty(name);
+
+			if (!prop.hasMultipleDifferentValues) prop.intValue = Mathf.Clamp(prop.intValue, min, max);
+		}
+	}
+}

AR/Assets/AstarPathfindingProject/PackageTools/Editor/EditorBase.cs.meta

@@ -0,0 +1,12 @@
+fileFormatVersion: 2
+guid: 58753931a68ae48b3973d0ce32d1a760
+timeCreated: 1495461526
+licenseType: Pro
+MonoImporter:
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

AR/Assets/AstarPathfindingProject/PackageTools/Editor/EditorGUIx.cs

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+using UnityEngine;
+using System.Collections.Generic;
+using UnityEditor;
+
+namespace Pathfinding {
+	/// <summary>Simple GUI utility functions</summary>
+	public static class GUIUtilityx {
+		static Stack<Color> colors = new Stack<Color>();
+
+		public static void PushTint (Color tint) {
+			colors.Push(GUI.color);
+			GUI.color *= tint;
+		}
+
+		public static void PopTint () {
+			GUI.color = colors.Pop();
+		}
+	}
+
+	/// <summary>
+	/// Editor helper for hiding and showing a group of GUI elements.
+	/// Call order in OnInspectorGUI should be:
+	/// - Begin
+	/// - Header/HeaderLabel (optional)
+	/// - BeginFade
+	/// - [your gui elements] (if BeginFade returns true)
+	/// - End
+	/// </summary>
+	public class FadeArea {
+		Rect lastRect;
+		float value;
+		float lastUpdate;
+		GUIStyle labelStyle;
+		GUIStyle areaStyle;
+		bool visible;
+		Editor editor;
+
+		/// <summary>
+		/// Is this area open.
+		/// This is not the same as if any contents are visible, use <see cref="BeginFade"/> for that.
+		/// </summary>
+		public bool open;
+
+		/// <summary>Animate dropdowns when they open and close</summary>
+		public static bool fancyEffects;
+		const float animationSpeed = 100f;
+
+		public FadeArea (bool open, Editor editor, GUIStyle areaStyle, GUIStyle labelStyle = null) {
+			this.areaStyle = areaStyle;
+			this.labelStyle = labelStyle;
+			this.editor = editor;
+			visible = this.open = open;
+			value = open ? 1 : 0;
+		}
+
+		void Tick () {
+			if (Event.current.type == EventType.Repaint) {
+				float deltaTime = Time.realtimeSinceStartup-lastUpdate;
+
+				// Right at the start of a transition the deltaTime will
+				// not be reliable, so use a very small value instead
+				// until the next repaint
+				if (value == 0f || value == 1f) deltaTime = 0.001f;
+				deltaTime = Mathf.Clamp(deltaTime, 0.00001F, 0.1F);
+
+				// Larger regions fade slightly slower
+				deltaTime /= Mathf.Sqrt(Mathf.Max(lastRect.height, 100));
+
+				lastUpdate = Time.realtimeSinceStartup;
+
+
+				float targetValue = open ? 1F : 0F;
+				if (!Mathf.Approximately(targetValue, value)) {
+					value += deltaTime*animationSpeed*Mathf.Sign(targetValue-value);
+					value = Mathf.Clamp01(value);
+					editor.Repaint();
+
+					if (!fancyEffects) {
+						value = targetValue;
+					}
+				} else {
+					value = targetValue;
+				}
+			}
+		}
+
+		public void Begin () {
+			if (areaStyle != null) {
+				lastRect = EditorGUILayout.BeginVertical(areaStyle);
+			} else {
+				lastRect = EditorGUILayout.BeginVertical();
+			}
+		}
+
+		public void HeaderLabel (string label) {
+			GUILayout.Label(label, labelStyle);
+		}
+
+		public void Header (string label) {
+			Header(label, ref open);
+		}
+
+		public void Header (string label, ref bool open) {
+			if (GUILayout.Button(label, labelStyle)) {
+				open = !open;
+				editor.Repaint();
+			}
+			this.open = open;
+		}
+
+		/// <summary>Hermite spline interpolation</summary>
+		static float Hermite (float start, float end, float value) {
+			return Mathf.Lerp(start, end, value * value * (3.0f - 2.0f * value));
+		}
+
+		public bool BeginFade () {
+			var hermite = Hermite(0, 1, value);
+
+			visible = EditorGUILayout.BeginFadeGroup(hermite);
+			GUIUtilityx.PushTint(new Color(1, 1, 1, hermite));
+			Tick();
+
+			// Another vertical group is necessary to work around
+			// a kink of the BeginFadeGroup implementation which
+			// causes the padding to change when value!=0 && value!=1
+			EditorGUILayout.BeginVertical();
+
+			return visible;
+		}
+
+		public void End () {
+			EditorGUILayout.EndVertical();
+
+			if (visible) {
+				// Some space that cannot be placed in the GUIStyle unfortunately
+				GUILayout.Space(4);
+			}
+
+			EditorGUILayout.EndFadeGroup();
+			EditorGUILayout.EndVertical();
+			GUIUtilityx.PopTint();
+		}
+	}
+	/// <summary>Handles fading effects and also some custom GUI functions such as LayerMaskField</summary>
+	public static class EditorGUILayoutx {
+		static Dictionary<int, string[]> layerNames = new Dictionary<int, string[]>();
+		static long lastUpdateTick;
+
+		/// <summary>
+		/// Tag names and an additional 'Edit Tags...' entry.
+		/// Used for SingleTagField
+		/// </summary>
+		static string[] tagNamesAndEditTagsButton;
+
+		/// <summary>
+		/// Last time tagNamesAndEditTagsButton was updated.
+		/// Uses EditorApplication.timeSinceStartup
+		/// </summary>
+		static double timeLastUpdatedTagNames;
+
+		public static int TagField (string label, int value, System.Action editCallback) {
+			// Make sure the tagNamesAndEditTagsButton is relatively up to date
+			if (tagNamesAndEditTagsButton == null || EditorApplication.timeSinceStartup - timeLastUpdatedTagNames > 1) {
+				timeLastUpdatedTagNames = EditorApplication.timeSinceStartup;
+				var tagNames = AstarPath.FindTagNames();
+				tagNamesAndEditTagsButton = new string[tagNames.Length+1];
+				tagNames.CopyTo(tagNamesAndEditTagsButton, 0);
+				tagNamesAndEditTagsButton[tagNamesAndEditTagsButton.Length-1] = "Edit Tags...";
+			}
+
+			// Tags are between 0 and 31
+			value = Mathf.Clamp(value, 0, 31);
+
+			var newValue = EditorGUILayout.IntPopup(label, value, tagNamesAndEditTagsButton, new [] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, -1 });
+
+			// Last element corresponds to the 'Edit Tags...' entry. Open the tag editor
+			if (newValue == -1) {
+				editCallback();
+			} else {
+				value = newValue;
+			}
+
+			return value;
+		}
+
+		public static bool UnityTagMaskList (GUIContent label, bool foldout, List<string> tagMask) {
+			if (tagMask == null) throw new System.ArgumentNullException("tagMask");
+			if (EditorGUILayout.Foldout(foldout, label)) {
+				EditorGUI.indentLevel++;
+				GUILayout.BeginVertical();
+				for (int i = 0; i < tagMask.Count; i++) {
+					tagMask[i] = EditorGUILayout.TagField(tagMask[i]);
+				}
+				GUILayout.BeginHorizontal();
+				if (GUILayout.Button("Add Tag")) tagMask.Add("Untagged");
+
+				EditorGUI.BeginDisabledGroup(tagMask.Count == 0);
+				if (GUILayout.Button("Remove Last")) tagMask.RemoveAt(tagMask.Count-1);
+				EditorGUI.EndDisabledGroup();
+
+				GUILayout.EndHorizontal();
+				GUILayout.EndVertical();
+				EditorGUI.indentLevel--;
+				return true;
+			}
+			return false;
+		}
+
+		/// <summary>Displays a LayerMask field.</summary>
+		/// <param name="label">Label to display</param>
+		/// <param name="selected">Current LayerMask</param>
+		public static LayerMask LayerMaskField (string label, LayerMask selected) {
+			if (Event.current.type == EventType.Layout && System.DateTime.UtcNow.Ticks - lastUpdateTick > 10000000L) {
+				layerNames.Clear();
+				lastUpdateTick = System.DateTime.UtcNow.Ticks;
+			}
+
+			string[] currentLayerNames;
+			if (!layerNames.TryGetValue(selected.value, out currentLayerNames)) {
+				var layers = Pathfinding.Util.ListPool<string>.Claim();
+
+				int emptyLayers = 0;
+				for (int i = 0; i < 32; i++) {
+					string layerName = LayerMask.LayerToName(i);
+
+					if (layerName != "") {
+						for (; emptyLayers > 0; emptyLayers--) layers.Add("Layer "+(i-emptyLayers));
+						layers.Add(layerName);
+					} else {
+						emptyLayers++;
+						if (((selected.value >> i) & 1) != 0 && selected.value != -1) {
+							for (; emptyLayers > 0; emptyLayers--) layers.Add("Layer "+(i+1-emptyLayers));
+						}
+					}
+				}
+
+				currentLayerNames = layerNames[selected.value] = layers.ToArray();
+				Pathfinding.Util.ListPool<string>.Release(ref layers);
+			}
+
+			selected.value = EditorGUILayout.MaskField(label, selected.value, currentLayerNames);
+			return selected;
+		}
+	}
+}

AR/Assets/AstarPathfindingProject/PackageTools/Editor/EditorGUIx.cs.meta

@@ -0,0 +1,7 @@
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}

AR/Assets/AstarPathfindingProject/PackageTools/Editor/EnumFlagDrawer.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Reflection;
+using UnityEditor;
+using UnityEngine;
+
+namespace Pathfinding {
+	[CustomPropertyDrawer(typeof(EnumFlagAttribute))]
+	public class EnumFlagDrawer : PropertyDrawer {
+		public override void OnGUI (Rect position, SerializedProperty property, GUIContent label) {
+			Enum targetEnum = GetBaseProperty<Enum>(property);
+
+			EditorGUI.BeginProperty(position, label, property);
+			EditorGUI.BeginChangeCheck();
+#if UNITY_2017_3_OR_NEWER
+			Enum enumNew = EditorGUI.EnumFlagsField(position, label, targetEnum);
+#else
+			Enum enumNew = EditorGUI.EnumMaskField(position, label, targetEnum);
+#endif
+			if (EditorGUI.EndChangeCheck() || !property.hasMultipleDifferentValues) {
+				property.intValue = (int)Convert.ChangeType(enumNew, targetEnum.GetType());
+			}
+			EditorGUI.EndProperty();
+		}
+
+		static T GetBaseProperty<T>(SerializedProperty prop) {
+			// Separate the steps it takes to get to this property
+			string[] separatedPaths = prop.propertyPath.Split('.');
+
+			// Go down to the root of this serialized property
+			System.Object reflectionTarget = prop.serializedObject.targetObject as object;
+			// Walk down the path to get the target object
+			foreach (var path in separatedPaths) {
+				FieldInfo fieldInfo = reflectionTarget.GetType().GetField(path, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
+				reflectionTarget = fieldInfo.GetValue(reflectionTarget);
+			}
+			return (T)reflectionTarget;
+		}
+	}
+}

AR/Assets/AstarPathfindingProject/PackageTools/Editor/EnumFlagDrawer.cs.meta

@@ -0,0 +1,12 @@
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+guid: 616267fcc419f44ea929599afa5c6aa2
+timeCreated: 1500392257
+licenseType: Pro
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+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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AR/Assets/AstarPathfindingProject/PackageTools/Editor/PackageToolsEditor.asmdef

@@ -0,0 +1,12 @@
+{
+    "name": "PackageToolsEditor",
+    "references": [
+        "AstarPathfindingProject"
+    ],
+    "optionalUnityReferences": [],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false
+}

AR/Assets/AstarPathfindingProject/PackageTools/Editor/PackageToolsEditor.asmdef.meta

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AR/Assets/AstarPathfindingProject/PackageTools/EnumFlagAttribute.cs

@@ -0,0 +1,7 @@
+using UnityEngine;
+
+namespace Pathfinding {
+	/// <summary>\author http://wiki.unity3d.com/index.php/EnumFlagPropertyDrawer</summary>
+	public class EnumFlagAttribute : PropertyAttribute {
+	}
+}

AR/Assets/AstarPathfindingProject/PackageTools/EnumFlagAttribute.cs.meta

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+timeCreated: 1500392257
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+  assetBundleVariant: 

AR/Assets/AstarPathfindingProject/PackageTools/UniqueComponentAttribute.cs

@@ -0,0 +1,6 @@
+namespace Pathfinding {
+	[System.AttributeUsage(System.AttributeTargets.Class, AllowMultiple = true)]
+	public class UniqueComponentAttribute : System.Attribute {
+		public string tag;
+	}
+}

AR/Assets/AstarPathfindingProject/PackageTools/UniqueComponentAttribute.cs.meta

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+timeCreated: 1513613274
+licenseType: Pro
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AR/Assets/AstarPathfindingProject/PackageTools/VersionedMonoBehaviour.cs

@@ -0,0 +1,53 @@
+using UnityEngine;
+
+namespace Pathfinding {
+	/// <summary>Exposes internal methods from <see cref="Pathfinding.VersionedMonoBehaviour"/></summary>
+	public interface IVersionedMonoBehaviourInternal {
+		void UpgradeFromUnityThread();
+	}
+
+	/// <summary>Base class for all components in the package</summary>
+	public abstract class VersionedMonoBehaviour : MonoBehaviour, ISerializationCallbackReceiver, IVersionedMonoBehaviourInternal {
+		/// <summary>Version of the serialized data. Used for script upgrades.</summary>
+		[SerializeField]
+		[HideInInspector]
+		int version = 0;
+
+		protected virtual void Awake () {
+			// Make sure the version field is up to date for components created during runtime.
+			// Reset is not called when in play mode.
+			// If the data had to be upgraded then OnAfterDeserialize would have been called earlier.
+			if (Application.isPlaying) version = OnUpgradeSerializedData(int.MaxValue, true);
+		}
+
+		/// <summary>Handle serialization backwards compatibility</summary>
+		protected virtual void Reset () {
+			// Set initial version when adding the component for the first time
+			version = OnUpgradeSerializedData(int.MaxValue, true);
+		}
+
+		/// <summary>Handle serialization backwards compatibility</summary>
+		void ISerializationCallbackReceiver.OnBeforeSerialize () {
+		}
+
+		/// <summary>Handle serialization backwards compatibility</summary>
+		void ISerializationCallbackReceiver.OnAfterDeserialize () {
+			var r = OnUpgradeSerializedData(version, false);
+
+			// Negative values (-1) indicate that the version number should not be updated
+			if (r >= 0) version = r;
+		}
+
+		/// <summary>Handle serialization backwards compatibility</summary>
+		protected virtual int OnUpgradeSerializedData (int version, bool unityThread) {
+			return 1;
+		}
+
+		void IVersionedMonoBehaviourInternal.UpgradeFromUnityThread () {
+			var r = OnUpgradeSerializedData(version, true);
+
+			if (r < 0) throw new System.Exception();
+			version = r;
+		}
+	}
+}

AR/Assets/AstarPathfindingProject/PackageTools/VersionedMonoBehaviour.cs.meta

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