Uuids for Unity GameObjects

!UnityUUIDs

How I added UUIDs to Unity Game Objects

ExampleGameObject.cs

using UnityEngine;

public class ExampleGameObject : MonoBehaviour
{
    public Uuid m_Uuid;
    
    /*
    // Then the rest of your code goes here
    */
}

Uuid.cs

//NOTE: Don't forget to generate a new UUID when you instantiate an object!

[System.Serializable]
public class Uuid
{
    public string uuid;

    public static Uuid Generate()
    {
        Uuid newUuid = new Uuid {uuid = System.Guid.NewGuid().ToString()};
        return newUuid;
    }
}

UuidDrawer.cs

//NOTE: This file goes in an Editor Folder!

using System;
using UnityEditor;
using UnityEngine;

[CustomPropertyDrawer(typeof(Uuid))]
public class UuidDrawer : PropertyDrawer
{
    public override void OnGUI(Rect a_Position, SerializedProperty a_Property, GUIContent a_Label)
    {
        EditorGUI.BeginProperty(a_Position, a_Label, a_Property);

        a_Position = EditorGUI.PrefixLabel(a_Position, GUIUtility.GetControlID(FocusType.Passive), a_Label);

        int indent = EditorGUI.indentLevel;
        EditorGUI.indentLevel = 0;

        const int uuidButtonWidth = 80;
        Rect uuidRect = new Rect(a_Position.x, a_Position.y, a_Position.width - uuidButtonWidth, a_Position.height);
        Rect newUuidButtonRect =
            new Rect(a_Position.x + uuidRect.width, a_Position.y, uuidButtonWidth, a_Position.height);

        SerializedProperty uuidProperty = a_Property.FindPropertyRelative("uuid");
        EditorGUI.SelectableLabel(uuidRect, uuidProperty.stringValue);
        if (GUI.Button(newUuidButtonRect, "New Uuid"))
        {
            if (EditorUtility.DisplayDialog("Generate new UUID?",
                "Generating a new UUID will break any data using the current uuid", "Yes", "Cancel"))
            {
                uuidProperty.stringValue = Guid.NewGuid().ToString();
            }
        }

        EditorGUI.indentLevel = indent;

        EditorGUI.EndProperty();
    }
}