- Set frame-time as close to the buffer swap as possible, and calculate smoothratio for Duke/SW as late as possible.

* Micro-optimisation, but was getting a very occasional jitter in Duke 3D that seems to have gone with this.

source/build/src/engine.cpp

@@ -2724,6 +2724,7 @@ void videoNextPage(void)
 {
  	g_beforeSwapTime = I_msTimeF();
 	videoShowFrame(0);
+    I_SetFrameTime();
 
     omdtims = mdtims;
     mdtims = I_msTime();

source/core/gamecontrol.cpp

@@ -941,7 +941,6 @@ void app_loop()
 			TickSubsystems();
 			twod->SetSize(screen->GetWidth(), screen->GetHeight());
 			twodpsp.SetSize(screen->GetWidth(), screen->GetHeight());
-			I_SetFrameTime();
 
 			handleevents();
 			updatePauseStatus();

source/games/duke/src/gameloop.cpp

@@ -353,8 +353,6 @@ bool GameTicker()
 		}
 	}
 
-	double const smoothRatio = playrunning() ? I_GetTimeFrac() * MaxSmoothRatio : MaxSmoothRatio;
-
 	gameupdatetime.Unclock();
 
 	if (ps[myconnectindex].gm & (MODE_EOL | MODE_RESTART))
@@ -370,6 +368,7 @@ bool GameTicker()
 	drawtime.Reset();
 	drawtime.Clock();
 	S_Update();
+	double const smoothRatio = playrunning() ? I_GetTimeFrac() * MaxSmoothRatio : MaxSmoothRatio;
 	displayrooms(screenpeek, smoothRatio);
 	displayrest(smoothRatio);
 	drawtime.Unclock();

source/sw/src/game.cpp

@@ -788,11 +788,11 @@ void GameTicker(void)
                 MoveTicker();
             }
 
-            smoothratio = I_GetTimeFrac() * MaxSmoothRatio;
-
             // Get input again to update q16ang/q16horiz.
             if (!PedanticMode)
                 getinput(&loc, TRUE);
+
+            smoothratio = I_GetTimeFrac() * MaxSmoothRatio;
         }
 
         drawscreen(Player + screenpeek, smoothratio);