Time.java :  » Game » rokon » com » stickycoding » rokon » Android Open Source

package com.stickycoding.rokon;

/**
 * Time.java
 * Keeps track of the game time, frames, loops etc.
 * 
 * @author Richard
 */
public class Time {
  
  protected static long drawTicks, drawRealTicks, lastDrawTicks;
  protected static int ticksSinceLastFrame;
  protected static float drawTicksFraction;
  
  protected static long loopTicks, loopRealTicks, lastLoopTicks;
  protected static int ticksSinceLastLoop;
  protected static float loopTicksFraction;

  protected static long pauseStart, pauseTime;
  protected static boolean paused;
  
  protected static void update() {
    lastDrawTicks = drawTicks;
    drawRealTicks = System.currentTimeMillis();
    if(paused) return;
    drawTicks = drawRealTicks - pauseTime;
    if(lastDrawTicks == 0) return;
    ticksSinceLastFrame = (int)(drawTicks - lastDrawTicks);
    drawTicksFraction = ticksSinceLastFrame / 1000f;
  }
  
  protected static void updateLoop() {
    lastLoopTicks = loopTicks;
    loopRealTicks = System.currentTimeMillis();
    if(paused) return;
    loopTicks = loopRealTicks - pauseTime;
    if(lastLoopTicks == 0) return;
    ticksSinceLastLoop = (int)(loopTicks - lastLoopTicks);
    loopTicksFraction = ticksSinceLastLoop / 1000f;
  }
  
  public static long getLoopTicks() {
    return loopTicks;
  }
  
  public static int getTicksSinceLastLoop() {
    return ticksSinceLastLoop;
  }
  
  public static float getLoopTicksFraction() {
    return loopTicksFraction;
  }
  
  public static long getLastLoopTicks() {
    return lastLoopTicks;
  }
  
  /**
   * Returns the ticks (in milliseconds) for the current frame
   * 
   * @return current ticks
   */
  public static long getDrawTicks() {
    return drawTicks;
  }
  
  /**
   * Returns the difference in ticks between this frame and the previous
   * 
   * @return the difference in ticks 
   */
  public static int getTicksSinceLastFrame() {
    return ticksSinceLastFrame;
  }
  
  /**
   * Returns the difference in ticks between this frame and the previous, as a fraction
   * 
   * @return a fraction, where 1f = 1000ms
   */
  public static float getDrawTicksFraction() {
    return drawTicksFraction;
  }
  
  /**
   * Returns the tick count for the previous frame
   * 
   * @return previous ticks
   */
  public static long getLastDrawTicks() {
    return lastDrawTicks;
  }
  
  /**
   * Pauses the tick count
   */
  public static void pause() {
    pauseStart = drawTicks;
    paused = true;
  }
  
  /**
   * Resumes the tick count
   */
  public static void resume() {
    pauseTime = System.currentTimeMillis() - pauseStart;
    paused = false;
  }
  
  

}