Mercurial > jmeCapture
annotate src/com/aurellem/capture/RatchetTimer.java @ 67:30cea3f0f30a
rename poorly named file.
| author | Robert McIntyre <rlm@mit.edu> |
|---|---|
| date | Tue, 28 Feb 2012 11:17:04 -0600 |
| parents | 155c70b7e6de |
| children | ddb300c5335f |
| rev | line source |
|---|---|
| rlm@63 | 1 package com.aurellem.capture; |
| rlm@63 | 2 |
| rlm@63 | 3 import com.jme3.system.Timer; |
| rlm@63 | 4 |
| rlm@63 | 5 /** |
| rlm@63 | 6 * RatchetTimer is the same as IsoTimer, except that it will ensure |
| rlm@63 | 7 * that the simulation does not proceed any faster than it would had |
| rlm@63 | 8 * NanoTimer been used. |
| rlm@63 | 9 * |
| rlm@63 | 10 * @author normenhansen, Robert McIntyre |
| rlm@63 | 11 */ |
| rlm@63 | 12 |
| rlm@63 | 13 public class RatchetTimer extends Timer{ |
| rlm@63 | 14 private float framerate; |
| rlm@63 | 15 private int ticks; |
| rlm@63 | 16 private long lastTime = 0; |
| rlm@63 | 17 |
| rlm@63 | 18 public RatchetTimer(float framerate) { |
| rlm@63 | 19 this.framerate = framerate; |
| rlm@63 | 20 this.ticks = 0; |
| rlm@63 | 21 } |
| rlm@64 | 22 |
| rlm@64 | 23 /** |
| rlm@64 | 24 * return time in milliseconds |
| rlm@64 | 25 */ |
| rlm@63 | 26 public long getTime() { |
| rlm@63 | 27 return (long) (this.ticks * (1.0f / this.framerate) * 1000f); |
| rlm@63 | 28 } |
| rlm@63 | 29 |
| rlm@63 | 30 public long getResolution() { |
| rlm@63 | 31 return 1000000000L; |
| rlm@63 | 32 } |
| rlm@63 | 33 |
| rlm@63 | 34 public float getFrameRate() { |
| rlm@63 | 35 return this.framerate; |
| rlm@63 | 36 } |
| rlm@63 | 37 |
| rlm@63 | 38 public float getTimePerFrame() { |
| rlm@63 | 39 return (float) (1.0f / this.framerate); |
| rlm@63 | 40 } |
| rlm@63 | 41 |
| rlm@63 | 42 public void update() { |
| rlm@63 | 43 long time = System.currentTimeMillis(); |
| rlm@63 | 44 long difference = time - lastTime; |
| rlm@63 | 45 lastTime = time; |
| rlm@63 | 46 if (difference < (1.0f / this.framerate) * 1000.0f) { |
| rlm@63 | 47 try { |
| rlm@63 | 48 Thread.sleep(difference); |
| rlm@63 | 49 } catch (InterruptedException ex) { |
| rlm@63 | 50 } |
| rlm@63 | 51 } |
| rlm@63 | 52 this.ticks++; |
| rlm@63 | 53 } |
| rlm@63 | 54 |
| rlm@63 | 55 public void reset() { |
| rlm@63 | 56 this.ticks = 0; |
| rlm@63 | 57 } |
| rlm@63 | 58 } |
| rlm@63 | 59 |