content: package eu.the5zig.mod.manager;
  
  public class FPSCalculator {
  
  	private int currentFPS;
  	private FPS[] timers;
  
  	public FPSCalculator() {
  		currentFPS = 0;
  		timers = new FPS[20];
  		long startTime = System.nanoTime();
  		for (int i = 0; i < timers.length; i++) {
  			long plus = startTime + ((long) i * 1000000000 / timers.length);
  			timers[i] = new FPS(plus);
  		}
  	}
  
  	public int getCurrentFPS() {
  		return currentFPS;
  	}
  
  	public void render() {
  		for (FPS fps : timers) {
  			fps.updateFPSCount();
  			if (fps.isOver()) {
  				this.currentFPS = fps.getFpsCount();
  				fps.updateStartTime();
  			}
  		}
  	}
  
  	public class FPS {
  
  		private long startTime;
  		private int fpsCount;
  
  		public FPS(long startTime) {
  			this.startTime = startTime;
  			fpsCount = 0;
  		}
  
  		public void updateFPSCount() {
  			fpsCount++;
  		}
  
  		public int getFpsCount() {
  			return fpsCount;
  		}
  
  		public boolean isOver() {
  			return System.nanoTime() - startTime >= 1000000000;
  		}
  
  		public void updateStartTime() {
  			while (isOver()) {
  				startTime += 1000000000;
  			}
  			fpsCount = 0;
  		}
  
  	}
  
  }
  