[AS3] Hittest any movieclip?

[babblebit]

Is it possible to perform a hittest on every movieclip with a certain property?

For example, could you get a game character controlled by the arrow keys to stop whenever it came into contact with any movieclip 100 pixels wide?

[zadvorsky]

Well, you can perform a hit test on every object, and only call the hero-stopping-method if the width of an object is 100 pixels.

Or you can loop over all objects, push those with a width of 100 into a separate array, and perform a hit test with each object in that array.

[tango88]

You should always carefully track all objects onscreen in a game.

For example, I track all enemies in a game using enemyArray. This is an array of objects.

I use 'hero' as the name of the player's object:

for(i=0;i<enemyArray.length;i++){
   if(enemyArray[i].width==100 && hero.hitTestObject(enemyArray[i]){
         //insert relevant action here
   }
}

[[afz]snickelfitz]

You can use the for-each-in loop with Arrays.
It's a bit more compact and orderly, and it might be slightly faster.
Also, since all of the enemies are identical types, you can use a Vector instead of an Array in Flash 10 or higher. It processes much faster.

for each (var e in enemyArray){
   if(e.width==100 && hero.hitTestObject(e){
         //insert relevant action here
   }
}