1 files changed, 99 insertions, 0 deletions
diff --git a/src/ru/olamedia/olacraft/game/Timer.java b/src/ru/olamedia/olacraft/game/Timer.java
new file mode 100644
index 0000000..1c0aaee
--- /dev/null
+++ b/src/ru/olamedia/olacraft/game/Timer.java
@@ -0,0 +1,99 @@
+package ru.olamedia.olacraft.game;
+
+/**
+ * For frame-rate independent movement
+ * 
+ * @author Oskar Veerhoek
+ */
+public class Timer {
+	private long lastTime; // nanoseconds
+	private double elapsedTime;
+	private float fps;
+	private int fpsCounter = 0;
+	private long lastFPS;
+	private float avgSeconds = 3;
+
+	/**
+	 * @return the fps
+	 */
+	public float getFps() {
+		return fps;
+	}
+
+	/**
+	 * @return the avgFps
+	 */
+	public float getAvgFps() {
+		return avgFps;
+	}
+
+	private float avgFps;
+
+	/**
+	 * Creates a timer.
+	 */
+	public Timer() {
+		fps = 0;
+	}
+
+	/**
+	 * Initializes the timer. Call this just before entering the game loop.
+	 */
+	public void initialize() {
+		lastTime = System.nanoTime();
+	}
+
+	/**
+	 * @return the elapsed time since the the next to last update call
+	 */
+	public double getElapsedTime() {
+		return elapsedTime;
+	}
+
+	/**
+	 * Updates the timer. Call this once every iteration of the game loop.
+	 * 
+	 * @return the elapsed time in milliseconds
+	 */
+	public double update() {
+		if (lastTime == 0) {
+			lastTime = System.nanoTime();
+			return 0;
+		} else {
+			long elapsedTime = System.nanoTime() - lastTime;
+			updateFps(elapsedTime);
+			lastTime = System.nanoTime();
+			this.elapsedTime = elapsedTime / (double) 1000000;
+			return this.elapsedTime;
+		}
+	}
+
+	public void updateFps(long elapsedTime) {
+		if (elapsedTime > 0) {
+			float ms = (float) (elapsedTime / 1000000);
+			if (ms > 0) {
+				fps = (float) (1000 / ms);
+			}
+		}
+		fpsCounter++;
+		if (lastFPS == 0) {
+			lastFPS = System.nanoTime();
+		} else {
+			double elapsedFPS = (System.nanoTime() - lastFPS) / (double) 1000000;
+			if (elapsedFPS > 1000 * avgSeconds) {
+				avgFps = fpsCounter / avgSeconds;
+				fpsCounter = 0;
+				lastFPS = System.nanoTime();
+			}
+		}
+
+		// if (elapsedTime > 0) {
+		// fps = (float) (1000 / (elapsedTime / 1000000));
+		// if (avgFps == 0) {
+		// avgFps = fps;
+		// } else {
+		// avgFps = avgFps + (fps - avgFps) / 1000;
+		// }
+		// }
+	}
+}
+\ No newline at end of file