koobas.hobune.stream
Drawing position handle from ScriptableObject editor.
I have a ScriptableObject and I want to make an editor so that when the instance of the ScriptableObject is selected in the inspector, it displays a position handle at a point based on a Vector3 variable saved in the ScriptableObject. I want to make it so that when the handle is moved, the variable within the ScriptableObject will update. Pretty much all handle examples I found on the internet use MonoBehaviours. How can I make this work?
Well, I just found out :D
I used the serializedObject and wrote the values directly to it. With serializedObject.Apply$$anonymous$$odifiedProperties(); these changes will be applied.
public class Test : ScriptableObject
{
public Vector3 point;
}
[CustomEditor(typeof(Test), true)]
public class TestEditor : Editor
{
private void OnEnable()
{
SceneView.duringSceneGui += OnSceneGUI;
}
void OnDisable()
{
SceneView.duringSceneGui -= OnSceneGUI;
}
private void OnSceneGUI(SceneView sceneView)
{
EditorGUI.BeginChangeCheck();
SerializedProperty testPoint = serializedObject.FindProperty("point");
Vector3 newPosition = Handles.PositionHandle(testPoint.vector3Value, Quaternion.identity);
if(EditorGUI.EndChangeCheck())
{
serializedObject.Apply$$anonymous$$odifiedProperties();
}
}
}
Hello @Umaymdt ,
Even though it's quite late, I'd like to share a solution to this problem. I had the same problem too, and I stumbled upon this post about mastering unity editor handles: https://connect.unity.com/p/mastering-unityeditor-handles
Search for ScriptableObject in the post and you'll find an implementation for undo/redo. Here is the link to the script on Github: https://github.com/alelievr/MasterUnityHandles/blob/master/ExamplesScenes/Editor/CurveScriptableObjectEditor.cs
To make this work, first, you have to register/unregister OnSceneGUI for the event SceneView.duringSceneGui since onSceneGUIDelegated is deprecated. Next, pay attention to the OnSceneGUI(SceneView sv) method, you'll see the GUI.changed check. If changed, you just have to apply the changes made during Handles.PositionHandle operation or whichever method of your choice, back to the target.
Example code:
MyScriptableObject.cs
using UnityEngine;
[CreateAssetMenu(fileName = "New SO", menuName = "Create New SO")]
public class MyScriptableObject : ScriptableObject
{
public Vector3 point;
}
MyScriptableObjectEditor.cs
using UnityEngine;
using UnityEditor;
[CustomEditor(typeof(MyScriptableObject))]
public class MyScriptableObjectEditor : Editor
{
void OnEnable()
{
SceneView.duringSceneGui += OnSceneGUI;
}
void OnDisable()
{
SceneView.duringSceneGui -= OnSceneGUI;
}
void OnSceneGUI(SceneView sv)
{
MyScriptableObject mySO = (MyScriptableObject)target;
Vector3 point = mySO.point;
point = Handles.PositionHandle(point, Quaternion.identity);
if (GUI.changed)
{
// for undo operation
Undo.RecordObject(target, "Move Point");
// apply changes back to target component
mySO.point = point;
}
}
}
Hope this helps.
I have the same issue, can't find anything after hours of googling and trying :/
