Forums → Programming Forum → Firing a bullet

What game is it... That'll help!

Badboy, Markzi isn't talking about a game, but how programming a game.
First off, AS2 or AS3?

AS2

Is this a top-down video game?

All you have to do is to get a movie clip to shoot projectiles from the player movie clip toward to the Mouse X and Y position.

I don't mean to be rude, Dannydaninja, but you're being far too general.

Here is a way:

First, you need to set a variable so that flash can render more than one bullet at a time. On the main stage actions panel, enter:
bulletNum=0

Next, create a movie clip to serve as the player, and in the library panel, give it the linkage, &quotlayer" (right click the movie clip in the library panel, and scroll to linkage. Select "export for actionscript&quot
Enter this into the main stage actions panel:
var player:MovieClip = _root.attachMovie(&quotlayer",&quotlayer",1)
player._x=550/2
player._y=400/2
For the generic 550x400 stage used by flash, this will place the player in the center of the stage.

Now create a new movie clip to serve as the bullet. Give this the linkage "bullet"

Now you need to create a mouse listener to detect if the player has clicked. Enter this in the main stage actions panel:
var mouseListener:Object = new Object()
mouseListener.onMouseDown=function(){
var bullet:MovieClip = _root.attachMovie("bullet","bullet"+bulletNum,100+bulletNum)
bulletNum++
bullet._x=player._x
bullet._y=player._y
bullet.speed=5
bullet.rads=Math.atan2(_ymouse-player._y,_xmouse-player._x)
bullet.onEnterFrame=function(){
this._x+=this.rads*this.speed
if(this._x>550 || this._x<0 || this._y<0 || this._y>400){
this.removeMovieClip()
}
}
}
This will shoot a bullet from the player in the direction of the mouse every time the player presses the left mouse button.

My mistake, but I forgot one snippet of code:
enter this at the end of the main stage actions panel:
Mouse.addListener(mouseListener)

Here is what you're code should look like:

bulletNum=0
var player:MovieClip = _root.attachMovie(&quotlayer",&quotlayer",1)
player._x=550/2
player._y=400/2
var mouseListener:Object = new Object()
mouseListener.onMouseDown=function(){
var bullet:MovieClip = _root.attachMovie("bullet","bullet"+bulletNum,100+bulletNum)
bulletNum++
bullet._x=player._x
bullet._y=player._y
bullet.speed=5
bullet.rads=Math.atan2(_ymouse-player._y,_xmouse-player._x)
bullet.onEnterFrame=function(){
this._x+=Math.cos(this.rads)*this.speed
this._y+=Math.sin(this.rads)*this.speed
if(this._x>550 || this._x<0 || this._y<0 || this._y>400){
this.removeMovieClip()
}
}
}
Mouse.addListener(mouseListener)

I appologize for the mistakes

Thanks arobe but I'm getting another character and another bullet, my main character moves while the other one that appears does not, and the bullet shoots from the unmovable character, if I remove the "attach movieclip" code I go back to square one. Any idea how to fix this?

Any suggestions? I've been at it for ages but nothing seems to work

It sounds like you started with another movie clip on the stage. You're main stage should be completely blank, with two clips in the library. If you want a moveable character, you could add this to your main stage actions, to control the player with the arrow keys.

player.onEnterFrame = function(){
if(Key.isDown(Key.UP)){
this._y--
}else if(Key.isDown(Key.DOWN)){
this._y++
}
if(Key.isDown(Key.LEFT)){
this._x--
}else if(Key.isDown(Key.RIGHT)){
this._x++
}

If that isn't your problem, than give me some more details on exactly what is happening and I'll get back to you as soon as possible

Thanks for the reply, but the thing is, I gave the gun a linkage of player, because I want the bullet to fire from the gun, so how do I make the newly attached gun move like the gun that is inside the character?

If I'm not explaining very well, I could send you my .fla if you want.

Hmm, are you writing code in external classes or in the frames?

In the frames