Custom unity attributes.

Inspector:

• [RequiredField] works with references types, logs error if required field isn't set.

  [SerializedField, RequiredField] Transform;
  

• [ShowIf] Conditional attribute hide, disable field by condition.

  [SerializeField] private bool bool01;
  [SerializeField] private int int01;
  [SerializeField, ShowIf(ActionOnConditionFail.DO_NOT_DRAW, ConditionOperator.OR, new string[] {nameof(bool01), nameof(int01)})]
  private string str;
  

• [PreviewSprite] Display sprite preview in inspector.

  [SerializeField, PreviewSprite(100)] private Sprite sprite;
  

• [EditorButton] and [ScriptableEditorButton] Simple method attribute (without params). Display simple inspector button.

• [MinMaxSlider(0, 10)] Simple min. / max. inspector Vector2 based slider.

• [ReadOnly] Display disabled/not active field.