AS3 hittest with a tweening movieclip, what is the best way?

Question

I'm making a simple game. The character is movable with the arrow keys. The enemies are moving around the screen with a (classic) tween.

I want to detect collision between the character and the enemies. At first I thought it was working properly, but it also seems to detect a collision on the starting position from the enemies. So even if the enemies are already moving/tweening away from their start position, there's a collision detected between the character and these starting positions. (please ask questions if you don't quite get what I mean)

First method:

addEventListener(Event.ENTER_FRAME, checkIfHitTest);
function checkIfHitTest(Event)
{
      if(player.hitTestObject(enemies))
      {
        trace("yes");

      }
      else
      {
           trace("no");

      }
}

This didn't work properly because it seems to detect the collition even if the enemy moved away from the starting point. (Probably because the ENTER_FRAME but correct me if i'm wrong)

My question to you: What's causing the detection and what is the best way to detect collision between a tweening movieclip and a movieclip wich is movable with the arrowkeys?

Answer 1

From what you describe, your problem is probably relative to the movie-clip you are targeting to test collisions with.

To be more precise, I think you are testing your collisions against the movie-clip containing the enemy animation and the enemy graphics. But indeed this movie-clip doesn't move at all... it's fixed and only its content is moving (well at least it seems to be fixed from what I can read).

To solve this problem, you need to test against the movie-clip you animate inside the movie-clip containing the animation. So give a name to this movie-clip (e.g. enemyShape) inside the animation move-clip and try to test collision using this one (take care to give the name on each key-frame of the tween animation).

Basically you will have to test against "enemyClipXXX.enemyShape" with XXX being any method you are using to name your enemies movie-clips.