the whole game

src/client/Timer.h

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+#ifndef NET_MINECRAFT_CLIENT__Timer_H__
+#define NET_MINECRAFT_CLIENT__Timer_H__
+
+//package net.minecraft.client;
+#include "../platform/time.h"
+
+class Timer
+{
+public:
+	Timer(float ticksPerSecond)
+	:	ticksPerSecond(ticksPerSecond),
+		adjustTime(1.0f),
+		timeScale(1.0f),
+		passedTime(0)
+	{
+        lastMs = getTimeMs();
+        lastMsSysTime = lastMs;
+        lastTime = lastMs / 1000.0f;
+    }
+
+    void advanceTime() {
+        long nowMs = getTimeMs();
+        long passedMs = nowMs - lastMs;
+        long msSysTime = nowMs;//System.nanoTime() / 1000000;
+
+        if (passedMs > 1000) {
+            long passedMsSysTime = msSysTime - lastMsSysTime;
+            if (passedMsSysTime == 0)
+                passedMs = passedMsSysTime = 1;
+
+            float adjustTimeT = passedMs / (float) passedMsSysTime;
+            adjustTime += (adjustTimeT - adjustTime) * 0.2f;
+
+            lastMs = nowMs;
+            lastMsSysTime = msSysTime;
+        }
+        if (passedMs < 0) {
+            lastMs = nowMs;
+            lastMsSysTime = msSysTime;
+        }
+
+		float now = msSysTime / 1000.0f;
+        float passedSeconds = (now - lastTime) * adjustTime;
+        lastTime = now;
+
+        if (passedSeconds < 0) passedSeconds = 0;
+        if (passedSeconds > 1) passedSeconds = 1;
+        //LOGI("passed s: %f\n", passedSeconds);
+
+        passedTime += passedSeconds * timeScale * ticksPerSecond;
+
+        ticks = (int) passedTime;
+        passedTime -= ticks;
+        if (ticks > MAX_TICKS_PER_UPDATE) ticks = MAX_TICKS_PER_UPDATE;
+        a = passedTime;
+    }
+
+    /**
+     * Advances time the max number of ticks per second.
+     */
+    void advanceTimeQuickly() {
+
+        float passedSeconds = (float) MAX_TICKS_PER_UPDATE / (float) ticksPerSecond;
+
+        passedTime += passedSeconds * timeScale * ticksPerSecond;
+        ticks = (int) passedTime;
+        passedTime -= ticks;
+        a = passedTime;
+
+        lastMs = getTimeMs();//System.currentTimeMillis();
+        lastMsSysTime = lastMs;
+    }
+
+    void skipTime() {
+        long nowMs = getTimeMs();//System.currentTimeMillis();
+        long passedMs = nowMs - lastMs;
+        long msSysTime = nowMs;//System.nanoTime() / 1000000;
+
+        if (passedMs > 1000) {
+            long passedMsSysTime = msSysTime - lastMsSysTime;
+            if (passedMsSysTime == 0)
+                passedMs = passedMsSysTime = 1;
+
+            float adjustTimeT = passedMs / (float) passedMsSysTime;
+            adjustTime += (adjustTimeT - adjustTime) * 0.2f;
+
+            lastMs = nowMs;
+            lastMsSysTime = msSysTime;
+        }
+        if (passedMs < 0) {
+            lastMs = nowMs;
+            lastMsSysTime = msSysTime;
+        }
+
+		float now = msSysTime / 1000.0f;
+        float passedSeconds = (now - lastTime) * adjustTime;
+        lastTime = now;
+
+        if (passedSeconds < 0) passedSeconds = 0;
+        if (passedSeconds > 1) passedSeconds = 1;
+
+        passedTime += passedSeconds * timeScale * ticksPerSecond;
+
+        ticks = (int) 0;
+        if (ticks > MAX_TICKS_PER_UPDATE) ticks = MAX_TICKS_PER_UPDATE;
+        passedTime -= ticks;
+    }
+
+public:
+	float ticksPerSecond;
+	int ticks;
+	float a;
+	float timeScale;
+	float passedTime;
+private:
+	static const int MAX_TICKS_PER_UPDATE = 10;
+
+	float lastTime;
+	long lastMs;
+	long lastMsSysTime;
+	float adjustTime;
+};
+
+#endif /*NET_MINECRAFT_CLIENT__Timer_H__*/