Based on Damian Campeanu Ligthning Talk

• ScriptableObject

  class MyObject : ScriptableObject{
  
  }

• ScriptableObject.CreateInstance<MyObject>() and .DestroyImmediate()
• Mark fields [SerializeField], mark classes [Serializable]
• ISerializationCallbackReceiver hook into serialization system
• HideFlags.DontUnloadUnusedAsset and .DontSaveInEditor
• Change Detection and Reflection
  • SerializedObject and SerializedProperty
• Undo/Redo
  • Undo.RegisterCompleteObjectUndo(obj) to record state prior to change
  • Undo.ClearUndo(obj) to clear all saved states
  • Undo.undoRedoPerformed to detect undo/redo
• At Runtime
  • JsonUtility.ToJson(obj) and JsonUtility.FromJsonOverwrite(json, obj)

• Make sure C# filename and class names are the same
• Custom Editor Window
  • Inherit from EditorWindow
  • Add to main menu via [MenuItem("Windows/MyWin")]static void Func()
  • Different window types with: Show(), ShowPopup(), ShowUtility(), ShowAsDropDown()
  • Implement OnEnable() and add UI elements to rootVisualElement
  • OnDisable()
• Custom Inspector
  • Inherit from Editor w/ [CustomEditor(typeof(MyScriptableObject))] (see Editor for more details)
  • Override CreateInspectorGUI() to create custom UI
  • Bind to Editor.serializedObject
  • Implement Editor.OnSceneGUI() to add gizmos to the scene
• Custom Property Drawer (for specific type)
  • Inherit from PropertyDrawer -> [CustomPropertyDrawer(typeof(MyType))]
  • Override CreatePropertyGUI(prop)]

• Create/Save/Load Assets (ScriptableObjects)

[CreateAssetMenu(menuName = "Category/MyAsset")]
class MyAsset : ScriptableObject {}

• AssetDatabase.CreateAsset(obj, path) and .SaveAssets()
• AssetDatabase.LoadAssetFromPath<MyAsset>("Assets/Folder/file.ext")
• Detect Asset Changes
  • Inherit from AssetModificationProcessor
  • Implement OnWillCreateAsset(), OnWillSaveAssets(), ...
• Custom Asset Importing
  • Inherit from ScriptedImporter w/ [ScriptedImporter(version, "ext")]
  • Override OnImportAsset()
• Open Custom Asset with Custom Tool

[OnOpenAsset(0)] static bool OnOpenAsset(int instanceID, int line)

• Shortcut Manager Integration
  • [Shortcut]("Category/Function") attribute on any static method
• Settings Window
  • Inherit from SettingsProvider, implement OnActivate()/OnDeactivate()
  • [SettingsProvider] attribute on static method, return your SettingsProvider
• Editor Tools
  • Inherit from EditorTool w/ [EditorTool("name")] attribute
  • Override EditorTool.OnToolGUI(EditorWindow wnd)
• GameObject Operations in the Editor
  • ObjectFactory.CreateGameObject() to create with undo support and defaults
  • ObjectFactory.AddComponent() to add component
  • gameObject.transform.SetParent(myParent) to re-parent
  • GameObject.DestroyImmediate() to destroy

• Standard Unity Window Access

  • EditorWindow.GetWindow<SceneView>()
  • ProjectWindowUtil.GetContainingFolder(path)

• Cameras

  • Camera.allCameras

• Utilities

  • EditorUtility.DisplayProgressBar(), .InstanceIDToObject()

• EditorApplication

  • EditorApplication.isPlayingOrWillChangePlaymode
  • EditorApplication.playModeStateChanged
  • EditorApplication.applicationPath
  • EditorApplication.projectChanged
  • EditorApplication.update

• Domain Reload

  • AssemblyReloadEvents.beforeAssemblyReload