Fix Time::Synchronize to not reset time on unpause

Source/Editor/States/PlayingState.cs

@@ -163,7 +163,7 @@ namespace FlaxEditor.States
             IsPlayModeStarting = false;
             Profiler.EndEvent();
 
-            Time.Synchronize();
+            Time.Synchronize(true);
         }
 
         private void SetupEditorEnvOptions()
@@ -213,7 +213,7 @@ namespace FlaxEditor.States
             IsPlayModeEnding = false;
             Profiler.EndEvent();
 
-            Time.Synchronize();
+            Time.Synchronize(true);
         }
     }
 }

Source/Engine/Engine/Engine.cpp

@@ -157,7 +157,7 @@ int32 Engine::OnInit(const Char* cmdLine)
     Application::BeforeRun();
     LOG_FLOOR();
     LOG_FLUSH();
-    Time::Synchronize();
+    Time::Synchronize(true);
     EngineImpl::IsReady = true;
     PROFILE_MEM_END();
 

Source/Engine/Engine/Time.cpp

@@ -75,10 +75,11 @@ void TimeSettings::Apply()
 #endif
 }
 
-void Time::TickData::Synchronize(float targetFps, double currentTime)
+void Time::TickData::Synchronize(float targetFps, double currentTime, bool resetTotalTime)
 {
     OnReset(targetFps, currentTime);
-    Time = UnscaledTime = TimeSpan::Zero();
+    if (resetTotalTime)
+        Time = UnscaledTime = TimeSpan::Zero();
     NextBegin = targetFps > ZeroTolerance ? LastBegin + (1.0f / targetFps) : 0.0;
 }
 
@@ -258,13 +259,13 @@ void Time::SetFixedDeltaTime(bool enable, float value)
     FixedDeltaTimeValue = value;
 }
 
-void Time::Synchronize()
+void Time::Synchronize(bool resetTotalTime)
 {
     // Initialize tick data (based on a time settings)
     const double time = Platform::GetTimeSeconds();
-    Update.Synchronize(UpdateFPS, time);
-    Physics.Synchronize(PhysicsFPS, time);
-    Draw.Synchronize(DrawFPS, time);
+    Update.Synchronize(UpdateFPS, time, resetTotalTime);
+    Physics.Synchronize(PhysicsFPS, time, resetTotalTime);
+    Draw.Synchronize(DrawFPS, time, resetTotalTime);
 }
 
 bool Time::OnBeginUpdate(double time)

Source/Engine/Engine/Time.h

@@ -75,7 +75,7 @@ public:
         TimeSpan UnscaledTime;
 
     public:
-        virtual void Synchronize(float targetFps, double currentTime);
+        virtual void Synchronize(float targetFps, double currentTime, bool resetTotalTime);
         virtual void OnReset(float targetFps, double currentTime);
         virtual bool OnTickBegin(double time, float targetFps, float maxDeltaTime);
         virtual void OnTickEnd();
@@ -220,7 +220,8 @@ public:
     /// <summary>
     /// Synchronizes update, fixed update and draw. Resets any pending deltas for fresh ticking in sync.
     /// </summary>
-    API_FUNCTION() static void Synchronize();
+    /// <param name="resetTotalTime">True if reset total time, otherwise only delta time and ticking is reset.</param>
+    API_FUNCTION() static void Synchronize(bool resetTotalTime = false);
 
 private:
     // Methods used by the Engine class