About tink collision detection class [1]

In a collision detection class on the tink blog, the idea is to use the hitTestObject pre-judgment provided by flash to detect Collision Based on Pixel overlap.

Link: http://www.tink.ws/blog/as-30-hittest

The Code is as follows: package ws. tink. display
{
       
       Importflash. display. BitmapData;
       Import flash. display. BlendMode;
       Import flash. display. DisplayObject;
       Import flash. display. Sprite;
       
       Import flash. geom. ColorTransform;
       Import flash. geom. Matrix;
       Import flash. geom. Point;
       Import flash. geom. Rectangle;
       
       Public class HitTest
       {
 
               Public static function complexHitTestObject (target1: DisplayObject, target2: DisplayObject,Accurracy: Number = 1): Boolean
               {
                       Return complexIntersectionRectaNgle (target1, target2, accurracy). width! = 0;
               }
               
               Public static function intersectionRectangle (target1: DisplayObject, target2: DisplayObject): Rectangle
               {
                       // If either of the items don't have a reference to stage, thenthey are not in a display list