class Bug {
	
	
	private var c:MovieClip, dc:MovieClip;
	private var x:Number, y:Number, vx:Number, vy:Number, offset:Number, r:Number;
	private var target:Object;
	
	public var isHunted:Boolean;
	private var predator:Object;
	private var depth:Number = 100;
	
	
	
	public function Bug(c_:MovieClip, t_:Object, o_:Number, t:MovieClip) {
		
		c = c_;
		r = c._width/2;
		
		
		target = {}
		
		dc = t.createEmptyMovieClip("dc"+depth, ++depth)
		
		target.x = -40+t_.x+Math.random()*80;
		target.y = -40+t_.y+Math.random()*80;
		
		offset = o_;
		
		initBug(this);
		
	}
	
	
	
	private function initBug(arg:Bug):Void {
		
		vx = 0, vy = Math.random()*20;
		x = c._x, y = c._y;
		
		isHunted = false;
		c.onEnterFrame = function() {  arg.routine();  }
		
	}
	
	
	
	
	private function fly():Void {
		
		
		
		var ox:Number = x, oy:Number = y;
		
		
		
		var dist:Number = M2.dist(predator.x, predator.y, x, y);
		if(dist < 100 && isHunted) {
			
			vx += (x-predator.x)*.4, vy += (y-predator.y)*.4 + Math.sin(vx)*4;
			
		} else if (dist<50 && !isHunted) {
			
			vx += (x-predator.x)/5, vy += (y-predator.y)/5;
			
		} else {
		 
			vx += (target.x-x)/offset;
			vy += (target.y-y)/offset;
			
			vy += Math.sin(vx)*2;
			vx += Math.sin(vy)*2;
			
			if(M2.dist(target.x, target.y, x, y) > 30) vx*=.9, vy*=.9;
			
		}
		
		
		x += vx, y += vy;
		
		dc.clear();
		if( isHunted ) {
			
			dc.lineStyle(3,0,20);
			dc.moveTo(x, y);
			dc.lineTo(ox, oy);
			
		}
		
		walls();
		
	}
	
	
	
	
	private function render() {  c._x = x, c._y = y;  }
	
	
	
	
	private function routine() {  fly(), render();  }
	
	
	
	public function setPredator(p:Predator) {  predator = p;  }
	
	
	private function walls() {
		
		if(x < r) x=r, vx*=-.7;
		if(y < r) y=r, vy*=-.7;
		
		if(x+r > Stage.width) 	x=Stage.width-r,  vx*=-.7;
		if(y+r > Stage.height) 	y=Stage.height-r, vy*=-.7;
		
	}
		
	
	
	
	
	
}