working on multiplayer

Runtime/Engine/Code/Development/DebugOverlayView.cs

@@ -0,0 +1,46 @@
+using System;
+using RebootKit.Engine.Main;
+using RebootKit.Engine.UI;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace RebootKit.Engine.Services.Development {
+    public class DebugOverlayView : UIDocumentView {
+        const string k_DebugLabelClassName = "rr__debug-label";
+        
+        VisualElement m_RootElement;
+        
+        Label m_FPSLabel;
+        Label m_GameModeLabel;
+
+        void Update() {
+            if (m_RootElement == null) {
+                return;
+            }
+
+            Resolution resolution = Screen.currentResolution;
+            m_FPSLabel.text = $"fps: {Mathf.RoundToInt(1f / Time.deltaTime)} | dt: {Time.deltaTime:F4}ms | runtime: {Time.time:F4}s | resolution: {resolution.width}x{resolution.height}@{resolution.refreshRateRatio}Hz";
+            m_GameModeLabel.text = RR.GameModes.ActiveGameMode.CurrentValue != null
+                ? $"Game Mode: {RR.GameModes.ActiveGameMode.CurrentValue.GetType().Name}"
+                : "Game Mode: none";
+        }
+
+        public override VisualElement Build() {
+            m_RootElement = new VisualElement();
+            
+            CreateLabel($"Toggle Overlay [F3] | RebootKit | game: {Application.productName}, version: {Application.version}");
+            m_FPSLabel = CreateLabel($"FPS: {Application.targetFrameRate}");
+            
+            m_GameModeLabel = CreateLabel("Game Mode: none");
+            return m_RootElement;
+        }
+
+        Label CreateLabel(string text) {
+            Label label = (Label)LabelBuilder.New(text).Build();
+            label.AddToClassList(k_DebugLabelClassName);
+
+            m_RootElement.Add(label);
+            return label;
+        }
+    }
+}