Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Utilities/GUIViewportScope.cs

@@ -0,0 +1,34 @@
+using System;
+using UnityEngine;
+
+namespace UnityEditor
+{
+    // Special Clip Scope that only effects painting, and keeps the coordinate system identical
+    struct GUIViewportScope : IDisposable
+    {
+        bool m_open;
+        public GUIViewportScope(Rect position)
+        {
+            m_open = false;
+            if (Event.current.type == EventType.Repaint || Event.current.type == EventType.Layout)
+            {
+                GUI.BeginClip(position, -position.min, Vector2.zero, false);
+                m_open = true;
+            }
+        }
+
+        public void Dispose()
+        {
+            CloseScope();
+        }
+
+        void CloseScope()
+        {
+            if (m_open)
+            {
+                GUI.EndClip();
+                m_open = false;
+            }
+        }
+    }
+}