Advanced Search

Find edges of an object

/ Published in: ActionScript 3
Save to your folder(s)

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. function findBlingPoints(o:*, n:Number, s:String="right"){
  2. 	var myBitmapData:BitmapData = new BitmapData(o.width, o.height, true, 0x000000);
  3. 	myBitmapData.draw(o);
  4. 	var pixelValue:uint;
  5. 	var pointArray:Array = [];
  6. 	var currPixel:Boolean = false;
  7. 	var lastPixel:Boolean = false;
  8.  
  9. 	for(var i=0; i<myBitmapData.width; i++){
  10. 		pixelValue = myBitmapData.getPixel32(i, n);
  11. 		if(pixelValue==0){currPixel=false}else{currPixel=true};
  12. 		switch (s){
  13. 			case "right":
  14. 			if(!currPixel&&lastPixel){
  15. 				pointArray[pointArray.length]=i;
  16. 				pointArray[pointArray.length]=n;
  17. 			}
  18. 			break;
  19.  
  20. 			case "left":
  21. 			if(!lastPixel&&currPixel){
  22. 				pointArray[pointArray.length]=i;
  23. 				pointArray[pointArray.length]=n;
  24. 			}
  25. 			break;
  26.  
  27. 			case "both":
  28. 			if(lastPixel!=currPixel){
  29. 				pointArray[pointArray.length]=i;
  30. 				pointArray[pointArray.length]=n;
  31. 			}
  32. 			break;
  33. 		}						
  34. 		lastPixel = currPixel;
  35. 	}
  36. 	return pointArray;
  37. }

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.