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Assets/UMotionEditor/Scripts/Editor/EditorVersionCompatibilityUtility.cs

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+using UnityEngine;
+using UnityEditor;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using UnityEditor.Compilation;
+#if UNITY_2021_2_OR_NEWER
+using UnityEditor.SceneManagement;
+#else
+#if UNITY_2018_3_OR_NEWER
+using UnityEditor.Experimental.SceneManagement;
+#endif
+#endif
+
+namespace UMotionEditor
+{
+	public static class EditorVersionCompatibilityUtility
+	{
+		//********************************************************************************
+		// Public Properties
+		//********************************************************************************
+
+		public static float HandlesLineThickness
+        {
+			get
+            {
+#if UNITY_2020_2_OR_NEWER
+				return Handles.lineThickness;
+#else
+				return 1f;
+#endif
+			}
+		}
+
+		//********************************************************************************
+		// Private Properties
+		//********************************************************************************
+		
+		//----------------------
+		// Inspector
+		//----------------------
+		
+		//----------------------
+		// Internal
+		//----------------------
+
+		//********************************************************************************
+		// Public Methods
+		//********************************************************************************
+
+        public static bool IsModelPrefab(GameObject gameObject)
+        {
+#if UNITY_2018_3_OR_NEWER
+            return (PrefabUtility.GetPrefabAssetType(gameObject) == PrefabAssetType.Model);
+#else
+            return (PrefabUtility.GetPrefabType(gameObject) == PrefabType.ModelPrefab);
+#endif
+        }
+
+        public static bool IsPrefab(GameObject gameObject)
+        {
+#if UNITY_2018_3_OR_NEWER
+            return (PrefabUtility.GetPrefabAssetType(gameObject) != PrefabAssetType.NotAPrefab);
+#else
+            return (PrefabUtility.GetPrefabType(gameObject) != PrefabType.None);
+#endif
+        }
+
+		public static bool IsInPrefabStage()
+		{
+#if UNITY_2018_3_OR_NEWER
+			return (PrefabStageUtility.GetCurrentPrefabStage() != null);
+#else
+			return false;
+#endif
+		}
+
+		public static void DrawWireArc(Vector3 center, Vector3 normal, Vector3 from, float angle, float radius, float thickness)
+        {
+#if UNITY_2020_2_OR_NEWER
+			Handles.DrawWireArc(center, normal, from, angle, radius, thickness);
+#else
+			Handles.DrawWireArc(center, normal, from, angle, radius);
+#endif
+		}
+
+		//********************************************************************************
+		// Private Methods
+		//********************************************************************************
+
+	}
+}