topical media & game development
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lib-flex-animation-code-10-org-as3lib-kitchensync-utils-FrameRateView.ax

lib-flex-animation-code-10-org-as3lib-kitchensync-utils-FrameRateView.ax (swf ) [ flash ] flex 


  package org.as3lib.kitchensync.utils
  {
          import flash.text.TextField;
          import flash.text.TextFieldAutoSize;
          
          import org.as3lib.kitchensync.core.ISynchronizerClient;
          import org.as3lib.kitchensync.core.KitchenSyncEvent;
          import org.as3lib.kitchensync.core.Synchronizer;
          import org.as3lib.kitchensync.core.Timestamp;
A text field that displays the approximate buffered framerate of the synchronizer. Use it as you would a TextField. @use <code> public var frameRateView:TextField = new Synchronizer@ax-lib-flex-animation-code-10-org-as3lib-kitchensync-utils-FrameRateView(); addChild(frameRateView); </code>
see: org.as3lib.kitchensync.core.Synchronizer
author: Mims H. Wright @since 1.5 

  
          public class @ax-lib-flex-animation-code-10-org-as3lib-kitchensync-utils-FrameRateView extends TextField implements ISynchronizerClient
          {
Number of frames between each update

  
                  public var updateFrequency:int = 5;
                  
                  private var _previousTime:int = 0;
The function used to format the text displayed in the textfield. This can be replaced by the user. 

  
                  public var formattingFunction:Function = function (frameRate:int):String {
                          return frameRate.toString() + " FPS";
                  };
This array acts as a buffer to hold the past few framerates. 

  
                  private var _frameRateHistory:Array = [];
The number of framerates to hold in the history

  
                  private var _frameRateHistoryDepth:int = 10;
                  public function get actualFrameRate():Number {
                          var rate:int = 0;
                          for each (var history:int in _frameRateHistory) {
                                  rate += history;
                          }
                          rate /= _frameRateHistory.length;
                          return Math.round(1000/rate);        
                  }
Constructor

  
                  public function @ax-lib-flex-animation-code-10-org-as3lib-kitchensync-utils-FrameRateView()
                  {
                          super();
                          this.autoSize = TextFieldAutoSize.LEFT;
                          
                          Synchronizer.getInstance().registerClient(this);
                  }
Display is updated by the synchronizer pulses. 

  
                  public function update(currentTimestamp:Timestamp):void {        
                          _frameRateHistory.unshift(currentTimestamp.currentTime - _previousTime);
                          if (_frameRateHistory.length > _frameRateHistoryDepth) {
                                  _frameRateHistory.pop();
                          }
                          _previousTime = currentTimestamp.currentTime;
                          
                          if (currentTimestamp.currentFrame %5 == 0) {
                                  this.text = formattingFunction(actualFrameRate);
                          }
                  }
          }
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 19/08/2009

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