From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.Client/Timer.cpp | 138 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 Minecraft.Client/Timer.cpp

(limited to 'Minecraft.Client/Timer.cpp')

diff --git a/Minecraft.Client/Timer.cpp b/Minecraft.Client/Timer.cpp
new file mode 100644
index 00000000..b451c034
--- /dev/null
+++ b/Minecraft.Client/Timer.cpp
@@ -0,0 +1,138 @@
+#include "stdafx.h"
+#include "Timer.h"
+#include "..\Minecraft.World\System.h"
+
+Timer::Timer(float ticksPerSecond)
+{
+	// 4J - added initialisers
+    lastTime = 0;
+    ticks = 0;
+    a = 0;
+    timeScale = 1;
+    passedTime = 0;
+    accumMs = 0;
+    adjustTime = 1.0;
+
+    this->ticksPerSecond = ticksPerSecond;
+    lastMs = System::currentTimeMillis();
+    lastMsSysTime = System::nanoTime() / 1000000;
+}
+
+void Timer::advanceTime()
+{
+    __int64 nowMs = System::currentTimeMillis();
+    __int64 passedMs = nowMs - lastMs;
+    __int64 msSysTime = System::nanoTime() / 1000000;
+    double now = msSysTime / 1000.0;
+
+
+    if (passedMs > 1000)
+	{
+        lastTime = now;
+    }
+	else if (passedMs < 0)
+	{
+        lastTime = now;
+    }
+	else
+	{
+        accumMs += passedMs;
+        if (accumMs > 1000)
+		{
+            __int64 passedMsSysTime = msSysTime - lastMsSysTime;
+
+            double adjustTimeT = accumMs / (double) passedMsSysTime;
+            adjustTime += (adjustTimeT - adjustTime) * 0.2f;
+
+            lastMsSysTime = msSysTime;
+            accumMs = 0;
+        }
+        if (accumMs < 0)
+		{
+            lastMsSysTime = msSysTime;
+        }
+    }
+    lastMs = nowMs;
+
+    double passedSeconds = (now - lastTime) * adjustTime;
+    lastTime = now;
+
+    if (passedSeconds < 0) passedSeconds = 0;
+    if (passedSeconds > 1) passedSeconds = 1;
+
+    passedTime = (float)( passedTime + (passedSeconds * timeScale * ticksPerSecond));
+
+    ticks = (int) passedTime;
+    passedTime -= ticks;
+
+    if (ticks > MAX_TICKS_PER_UPDATE) ticks = MAX_TICKS_PER_UPDATE;
+
+    a = passedTime;
+
+}
+
+void Timer::advanceTimeQuickly()
+{
+
+    double passedSeconds = (double) MAX_TICKS_PER_UPDATE / (double) ticksPerSecond;
+
+    passedTime = (float)(passedTime + (passedSeconds * timeScale * ticksPerSecond));
+    ticks = (int) passedTime;
+    passedTime -= ticks;
+    a = passedTime;
+
+    lastMs = System::currentTimeMillis();
+    lastMsSysTime = System::nanoTime() / 1000000;
+
+}
+
+void Timer::skipTime()
+{
+    __int64 nowMs = System::currentTimeMillis();
+    __int64 passedMs = nowMs - lastMs;
+    __int64 msSysTime = System::nanoTime() / 1000000;
+    double now = msSysTime / 1000.0;
+
+
+    if (passedMs > 1000)
+	{
+        lastTime = now;
+    }
+	else if (passedMs < 0)
+	{
+        lastTime = now;
+    }
+	else
+	{
+        accumMs += passedMs;
+        if (accumMs > 1000)
+		{
+            __int64 passedMsSysTime = msSysTime - lastMsSysTime;
+
+            double adjustTimeT = accumMs / (double) passedMsSysTime;
+            adjustTime += (adjustTimeT - adjustTime) * 0.2f;
+
+            lastMsSysTime = msSysTime;
+            accumMs = 0;
+        }
+        if (accumMs < 0)
+		{
+            lastMsSysTime = msSysTime;
+        }
+    }
+    lastMs = nowMs;
+
+
+    double passedSeconds = (now - lastTime) * adjustTime;
+    lastTime = now;
+
+    if (passedSeconds < 0) passedSeconds = 0;
+    if (passedSeconds > 1) passedSeconds = 1;
+
+    passedTime = (float)(passedTime + (passedSeconds * timeScale * ticksPerSecond));
+
+    ticks = (int) 0;
+    if (ticks > MAX_TICKS_PER_UPDATE) ticks = MAX_TICKS_PER_UPDATE;
+    passedTime -= ticks;
+
+}
\ No newline at end of file
-- 
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