Detecting collisions

Essential to almost any game is going to be collision detection, so determining…when items hit each other or if they go off the screen--some sort of detection…to see where items are at and then giving a result there.…In this case, I need to determine when these UFOs hit the bottom, when they…hit my player, and then also when my lasers hit the UFOs, otherwise known as tempEnemy.…So those are the different sort of collision detections that I need to do.…

All right, and what I am going to do is I am going to go ahead and just have…some trace statements anytime some thing gets hit. You can see I already have…some laser hits the top, so that's a sort of collision detection that's…currently going on.…So let's just go into my Actions panel, and as I scroll down, let's jump into my…player, the movePlayer.…We can see that. And in moveLaser, you can see this trace("laser hits top").…

Well, I really don't need this.…In fact, that's probably going to get in the way, so I'm just going to delete it.…I already know it works; everything is fine.…