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Tutorials » Actionscripting

Advanced HitTest in Flash MX
Author: Art Bowles | Website: www.launchfire.com |

Another example simplified

hit1 = _root.TestGoalie1.hitTest("_root.ActionPuck")
trace (hit)
if (hit == true){
trace ("hi");
} else {
trace ("bye");
}

You can test for hits within a conditional statement then do something depending on whether it is true or not.

trace (_root.TestGoalie1.hitTest("_root.ActionPuck")); //outputstrue or false
if ( _root.TestGoalie1.hitTest("_root.ActionPuck")){ // if true
trace ("hit"); // true
} else {
trace ("miss"); // false
}

Other Senarios

Suppose you wanted to test for a hit against a certain area of your target object. In my case, if the goalie got hit in the mask, I wanted to know, because a different animation would run. All I had to do was make a square the size of the mask, convert it to a movie clip and give it an instance name, then check to see if it got hit.

if (_root.Goalie5.headshot.hitTest(_root.ActionPuck._x, _root.ActionPuck._y,
true)){

Conclusion

The hit test method is the primary means of detecting collision in a variety of flash games. As we have seen, the hitTest method remains unchanged from Flash 5, however, evaluating expressions has changed throught the use of brackets []. Hopefully this information will help you on your next project.

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