- reverted ClockTicks to an integer so that interpolation can be reimplemented without it affecting the global game timer.

The entire method at use here is essentially not correct. Interpolation should be handled independently of the game timer directly based on the underlying clock, like in ZDoom.
There's interpolation bugs in the Build games that cannot be fixed if totalclock is used for it, but if we use something else we do not need a fractional totalclock.

source/blood/src/view.cpp

@@ -3088,7 +3088,7 @@ void viewDrawScreen(bool sceneonly)
     lastUpdate = totalclock;
     if (!paused && (!M_Active() || gGameOptions.nGameType != 0))
     {
-        gInterpolate = ((totalclock-gNetFifoClock)+4).toScale16()/4;
+        gInterpolate = ((totalclock - gNetFifoClock) + 4) << 14;// .toScale16() / 4;
     }
     if (gInterpolate < 0 || gInterpolate > 65536)
     {

source/build/include/clockticks.hpp

@@ -17,6 +17,7 @@
 //      (so we might as well check it).
 EDUKE32_STATIC_ASSERT(-1 >> 1 == -1);
 
+#if 0
 class ClockTicks
 {
 public:
@@ -159,5 +160,8 @@ private:
         ticksS32 &= VALUE_MASK;
     }
 };
+#else
+using ClockTicks = int;
+#endif
 
 #endif /* CLOCKTICKS_HPP_ */

source/build/src/timer.cpp

@@ -45,7 +45,6 @@ ATTRIBUTE((flatten)) void timerUpdateClock(void)
     uint64_t numerator = (elapsedTime.count() * (uint64_t) timerticspersec * steady_clock::period::num);
     uint64_t freq = timerGetFreqU64();
     int n = tabledivide64(numerator, freq);
-    totalclock.setFraction(tabledivide64((numerator - n*timerGetFreqU64()) * 65536, freq));
 
     if (n <= 0) return;
 

source/core/gamecontrol.cpp

@@ -1031,13 +1031,12 @@ int CalcSmoothRatio(const ClockTicks &totalclk, const ClockTicks &ototalclk, int
 	const double TICRATE = 120.;
 
 	double rfreq = refreshfreq * TICRATE / timerGetClockRate();
-	double elapsedTime = (totalclk - ototalclk).toScale16F();
+	double elapsedTime = (totalclk - ototalclk);
 	double elapsedFrames = elapsedTime * rfreq * (1. / TICRATE);
 	double ratio = (elapsedFrames * realgameticspersec) / rfreq;
 	return clamp(xs_RoundToInt(ratio * 65536), 0, 65536);
 }
 
-
 FString G_GetDemoPath()
 {
 	FString path = M_GetDemoPath();