Mercurial > jmeCapture

     1 package com.aurellem.capture;

     2 

     3 import com.jme3.system.Timer;

     4 

     5 /**

     6  * RatchetTimer is the same as IsoTimer, except that it will ensure

     7  * that the simulation does not proceed any faster than it would had

     8  * NanoTimer been used.

     9  * 

    10  * @author normenhansen, Robert McIntyre

    11  */

    12 

    13 public class RatchetTimer extends Timer{

    14 	private float framerate;

    15     private int ticks;

    16     private long lastTime = 0;

    17 

    18     public RatchetTimer(float framerate) {

    19         this.framerate = framerate;

    20         this.ticks = 0;

    21     }

    22     

    23     /**

    24      * return time in milliseconds

    25      */

    26     public long getTime() {

    27         return (long) (this.ticks * (1.0f / this.framerate) * 1000f);

    28     }

    29 

    30     public long getResolution() {

    31         return 1000000000L;

    32     }

    33 

    34     public float getFrameRate() {

    35         return this.framerate;

    36     }

    37 

    38     public float getTimePerFrame() {

    39         return (float) (1.0f / this.framerate);

    40     }

    41 

    42     public void update() {

    43         long time = System.currentTimeMillis();

    44         long difference = time - lastTime;

    45         lastTime = time;

    46         if (difference < (1.0f / this.framerate) * 1000.0f) {

    47             try {

    48                 Thread.sleep(difference);

    49             } catch (InterruptedException ex) {

    50             }

    51         }

    52         this.ticks++;

    53     }

    54 

    55     public void reset() {

    56         this.ticks = 0;

    57     }

    58 }

    59
author	Robert McIntyre <rlm@mit.edu>
date	Tue, 28 Feb 2012 11:10:14 -0600
parents	155c70b7e6de
children	ddb300c5335f