content: /*
   * Copyright (c) 2019-2020 5zig Reborn
   * Copyright (c) 2015-2019 5zig
   *
   * This file is part of The 5zig Mod
   * The 5zig Mod is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * The 5zig Mod is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with The 5zig Mod.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  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;
  		}
  
  	}
  
  }
  