// Ships load event handler
onClipEvent(load){
	var maxSpeed = 8;
	var speed = 0;
	var slowDownSpeed = 0.3;
	var accelerateSpeed = 2;
	var turnSpeed = 5;
}

// Ships enterFrame event handler
onClipEvent(enterFrame){
	// Shoot a bullet from this ships position
	if(Key.isDown(Key.SPACE)){
		_root.spawnBullet(this._x, this._y, this._rotation);
	}
	
	// Accelerate if Up is pressed otherwise slowdown
	if(Key.isDown(Key.UP)){
		if(speed <= maxSpeed-accelerateSpeed){
			speed += accelerateSpeed;
		}
		else
		{
			speed = maxSpeed;
		}
	}
	else
	{
		if(speed > slowDownSpeed){
			speed -= slowDownSpeed;
		}
		else
		{
			speed = 0;
		}
	}
	
	// Rotate the ship counter-clockwise
	if(Key.isDown(Key.LEFT)){
		this._rotation -= turnSpeed;
	}
	
	// Rotate the ship clockwise
	if(Key.isDown(Key.RIGHT)){
		this._rotation += turnSpeed;
	}
	
	// Move the ship to its next position
	var angle = this._rotation*Math.PI/180;
	this._x += Math.cos(angle)*speed;
	this._y += Math.sin(angle)*speed;
}

this.onLoad = function(){
	// Array to hold all the bullets that are fired
	var bullets = new Array();
}

function spawnBullet(x, y, angle){
	// Attach the bullet movie clip to the stage
	var depth = _root.getNextHighestDepth();
	var b = _root.attachMovie("Bullet", "b_"+depth, depth);
	
	// Position the bullet and set its angle
	b._x = x; b._y = y; b._rotation = angle; b.alive = 20;
	
	// The bullets enterFrame event handler
	b.onEnterFrame = function(){
		// Move the bulltet to it's next destination
		var angle = this._rotation*Math.PI/180;
		this._x += Math.cos(angle)*20;
		this._y += Math.sin(angle)*20;
		
		// If the alive timer reaches zero then remove the bullet
		if(this.alive <= 0){
			removeMovieClip(this);
		}
		// Decrease the alive timer each frame
		this.alive--;
		
		// Give the bullet's a fade out effect over time
		this._alpha -= 5;
	}
	
	// Add the bullet to the array
	bullets.push(b);
}