Squashed commit of the following:

commit 2fbc2f5
Author: Jon McCreadie <[email protected]>
Date:   Tue Mar 19 14:10:36 2024 +0000

    Update GizmoDrawerInspector.cs

    add bool method that hides the origin options if useAttachedTransformValues is set to true;

commit 408cc6b
Author: Jon McCreadie <[email protected]>
Date:   Tue Mar 19 14:09:14 2024 +0000

    Update GizmoTool.cs

    Set the origin transform to the one the script is on in relevant gizmo types.

commit d232b67
Author: Jon McCreadie <[email protected]>
Date:   Tue Mar 19 11:32:40 2024 +0000

    Set Origin Transform Automatically

    * Automatically sets the origin transform to the attached transform if Use Attached Transform Values is set to true in the inspector.

    * Renamed Use Transform Values bool to Use Attached Transform Values.

Author: FrayedFunction

Editor/GizmoDrawer.cs

@@ -28,7 +28,7 @@ public class GizmoDrawer : MonoBehaviour
         // Mesh
         [HideInInspector] public Mesh mesh;
         [HideInInspector] public Vector3 meshRotation;
-        [HideInInspector] public bool useTransformValues;
+        [HideInInspector] public bool useAttachedTransformValues;
         //Line
         [HideInInspector] public Transform targetTransform;
         [HideInInspector] public Vector3 targetPosition;

Editor/GizmoDrawerInspector.cs

@@ -67,7 +67,7 @@ private void OnEnable()
             serProp_texture = serializedObject.FindProperty("texture");
             serProp_mat = serializedObject.FindProperty("mat");
 
-            serProp_useTransfromVals = serializedObject.FindProperty("useTransformValues");
+            serProp_useTransfromVals = serializedObject.FindProperty("useAttachedTransformValues");
         }
 
         public override void OnInspectorGUI()
@@ -82,7 +82,7 @@ public override void OnInspectorGUI()
             EditorGUILayout.PropertyField(serProp_gizmoType, true);
             EditorGUILayout.Space();
 
-            if (_showSingleOrigin)
+            if (_showSingleOrigin && ShowOriginOptions(gizmoDrawer))
             {
                 // Transform
                 EditorGUILayout.PropertyField(serProp_originTrans);
@@ -194,6 +194,17 @@ static void DrawInspector(GizmoType type, GizmoDrawerInspector editor, out bool
                     break;
             }
         }
+
+        static bool ShowOriginOptions(GizmoDrawer drawer)
+        {
+            if (drawer.gizmoType == GizmoType.Mesh || drawer.gizmoType == GizmoType.WireMesh)
+            {
+                if (drawer.useAttachedTransformValues) 
+                    return false;
+            }
+
+            return true;
+        }
     }
 #endif
 }

Editor/GizmoTool.cs

@@ -53,10 +53,16 @@ internal static void DrawGizmo(GizmoDrawer drawer)
                     break;
 
                 case GizmoType.Mesh:
+                    if (drawer.useAttachedTransformValues)
+                        drawer.originTransform = drawer.transform;
+
                     Gizmos.DrawMesh(drawer.mesh, OriginPosition(drawer), MeshRotation(drawer), MeshScale(drawer), drawer.gizmoColor);
                     break;
 
                 case GizmoType.WireMesh:
+                    if (drawer.useAttachedTransformValues)
+                        drawer.originTransform = drawer.transform;
+
                     Gizmos.DrawWireMesh(drawer.mesh, OriginPosition(drawer), MeshRotation(drawer), MeshScale(drawer), drawer.gizmoColor);
                     break;
 
@@ -125,7 +131,7 @@ static void SyncPositionArrays(GizmoDrawer drawer, out Vector3[] points, out Tra
 
         static Quaternion MeshRotation(GizmoDrawer drawer)
         {
-            if (drawer.useTransformValues)
+            if (drawer.useAttachedTransformValues)
             {
                 if (drawer.originTransform != null)
                     return drawer.originTransform.rotation;
@@ -138,7 +144,7 @@ static Quaternion MeshRotation(GizmoDrawer drawer)
 
         static Vector3 MeshScale(GizmoDrawer drawer)
         {
-            if (drawer.useTransformValues)
+            if (drawer.useAttachedTransformValues)
             {
                 if (drawer.originTransform != null)
                     return drawer.originTransform.localScale;