Add option to show Debug Draw shapes in Game Viewport

Source/Editor/Viewport/MainEditorGizmoViewport.cs

@@ -165,6 +165,11 @@ namespace FlaxEditor.Viewport
         /// </summary>
         public bool DrawDebugDraw = true;
 
+        /// <summary>
+        /// Gets the debug draw data for the viewport.
+        /// </summary>
+        public ViewportDebugDrawData DebugDrawData => _debugDrawData;
+
         /// <summary>
         /// Gets or sets a value indicating whether show navigation mesh.
         /// </summary>

Source/Editor/Windows/GameWindow.cs

@@ -1,11 +1,11 @@
 // Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
 
+using System;
 using FlaxEditor.GUI.ContextMenu;
 using FlaxEditor.GUI.Input;
 using FlaxEditor.Options;
 using FlaxEngine;
 using FlaxEngine.GUI;
-using FlaxEngine.Utilities;
 
 namespace FlaxEditor.Windows
 {
@@ -18,6 +18,7 @@ namespace FlaxEditor.Windows
         private readonly RenderOutputControl _viewport;
         private readonly GameRoot _guiRoot;
         private bool _showGUI = true;
+        private bool _showDebugDraw = false;
         private float _gameStartTime;
 
         /// <summary>
@@ -36,14 +37,20 @@ namespace FlaxEditor.Windows
                 if (value != _showGUI)
                 {
                     _showGUI = value;
-
-                    // Update root if it's in game
-                    //if (Editor.StateMachine.IsPlayMode)
-                        _guiRoot.Visible = value;
+                    _guiRoot.Visible = value;
                 }
             }
         }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether show Debug Draw shapes in the view or keep it hidden.
+        /// </summary>
+        public bool ShowDebugDraw
+        {
+            get => _showDebugDraw;
+            set => _showDebugDraw = value;
+        }
+
         /// <summary>
         /// Gets or sets a value indicating whether center mouse position on window focus in play mode. Helps when working with games that lock mouse cursor.
         /// </summary>
@@ -191,6 +198,7 @@ namespace FlaxEditor.Windows
                 AutoFocus = false,
                 Parent = this
             };
+            task.PostRender += OnPostRender;
 
             // Override the game GUI root
             _guiRoot = new GameRoot
@@ -214,6 +222,31 @@ namespace FlaxEditor.Windows
             InputActions.Add(options => options.StepFrame, Editor.Simulation.RequestPlayOneFrame);
         }
 
+        private void OnPostRender(GPUContext context, RenderContext renderContext)
+        {
+            // Debug Draw shapes
+            if (_showDebugDraw)
+            {
+                var task = _viewport.Task;
+
+                // Draw actors debug shapes manually if editor viewport is hidden (game viewport task is always rendered before editor viewports)
+                var editWindowViewport = Editor.Windows.EditWin.Viewport;
+                if (editWindowViewport.Task.LastUsedFrame != Engine.FrameCount)
+                {
+                    unsafe
+                    {
+                        var drawDebugData = editWindowViewport.DebugDrawData;
+                        fixed (IntPtr* actors = drawDebugData.ActorsPtrs)
+                        {
+                            DebugDraw.DrawActors(new IntPtr(actors), drawDebugData.ActorsCount, true);
+                        }
+                    }
+                }
+
+                DebugDraw.Draw(ref renderContext, task.OutputView);
+            }
+        }
+
         private void OnOptionsChanged(EditorOptions options)
         {
             CenterMouseOnFocus = options.Interface.CenterMouseOnGameWinFocus;
@@ -282,12 +315,16 @@ namespace FlaxEditor.Windows
 
             // Show GUI
             {
-                var showGui = menu.AddButton("Show GUI");
-                var showGuiCheckbox = new CheckBox(140, 2, ShowGUI)
-                {
-                    Parent = showGui
-                };
-                showGuiCheckbox.StateChanged += x => ShowGUI = x.Checked;
+                var button = menu.AddButton("Show GUI");
+                var checkbox = new CheckBox(140, 2, ShowGUI) { Parent = button };
+                checkbox.StateChanged += x => ShowGUI = x.Checked;
+            }
+
+            // Show Debug Draw
+            {
+                var button = menu.AddButton("Show Debug Draw");
+                var checkbox = new CheckBox(140, 2, ShowDebugDraw) { Parent = button };
+                checkbox.StateChanged += x => ShowDebugDraw = x.Checked;
             }
 
             menu.MinimumWidth = 200;

Source/Engine/Graphics/RenderTask.h

@@ -84,7 +84,7 @@ public:
     /// <summary>
     /// The index of the frame when this task was last time rendered.
     /// </summary>
-    uint64 LastUsedFrame = 0;
+    API_FIELD(ReadOnly) uint64 LastUsedFrame = 0;
 
     /// <summary>
     /// Action fired on task rendering.