// FILE: 'shooter.as'

package  {
    import flash.display.MovieClip;
    import flash.text.TextField;
    import flash.ui.Keyboard;
    import flash.events.KeyboardEvent;
    import flash.events.Event;
    import Ship;
    import Bullet;
    import Util;

    public class shooter extends MovieClip {

        private var s: Ship;
        private var bullet_timeout: int;
        private var keyPressed:Object = { };
        private var lbl: TextField;

        public function shooter() {
            // constructor code

            lbl = new TextField();
            lbl.text = 'Click anywhere on the canvas to give focus.\nArrow keys move around, space fires bullets.'
            lbl.selectable = false;
            lbl.width = 400;
            lbl.x = 12;
            lbl.y = 12;
            this.stage.addChild(lbl);

            s = new Ship();
            s.x = 275;
            s.y = 200;
            s.rotation = -90;
            this.stage.addChild(s);

            this.stage.addEventListener(KeyboardEvent.KEY_DOWN, on_keydown);
            this.stage.addEventListener(KeyboardEvent.KEY_UP, on_keyup);
            this.stage.addEventListener(Event.ENTER_FRAME, on_enterframe);

            bullet_timeout = 0;
        }

        private function on_keydown(e: KeyboardEvent) {
            keyPressed[e.keyCode] = true;
        }

        private function on_keyup(e: KeyboardEvent) {
            keyPressed[e.keyCode] = false;
        }

        private function on_enterframe(e: Event) {
            if (keyPressed[Keyboard.LEFT]) {
                s.rotation -= 3;
            }
            if (keyPressed[Keyboard.RIGHT]) {
                s.rotation += 3;
            }
            if (keyPressed[Keyboard.UP]) {
                s.x += Math.cos(Util.deg2rad(s.rotation))*3;
                s.y += Math.sin(Util.deg2rad(s.rotation))*3;
            }
            if (keyPressed[Keyboard.DOWN]) {
                s.x -= Math.cos(Util.deg2rad(s.rotation))*5;
                s.y -= Math.sin(Util.deg2rad(s.rotation))*5;
            }
            if (keyPressed[Keyboard.SPACE]) {
                if (bullet_timeout >= 5) {
                    var x1, x2, y1, y2;
                    x1 = s.x + Math.cos(Util.deg2rad(s.rotation+15))*20;
                    y1 = s.y + Math.sin(Util.deg2rad(s.rotation+15))*20;
                    x2 = s.x + Math.cos(Util.deg2rad(s.rotation-15))*20;
                    y2 = s.y + Math.sin(Util.deg2rad(s.rotation-15))*20;
                    var b1 = new Bullet(x1, y1, s.rotation);
                    var b2 = new Bullet(x2, y2, s.rotation);
                    this.stage.addChild(b1);
                    this.stage.addChild(b2);
                    bullet_timeout = 0;
                } else {
                    bullet_timeout++;
                }
            }
        }
    }
}

// FILE 'Ship.as'

package  {
    import flash.display.MovieClip;

    public class Ship extends MovieClip {

        public function Ship() {
            // draw ship
            with (this.graphics) {
                lineStyle (1, 0x000000, 1);
                moveTo(15, 0);
                lineTo(-15, 7.5);
                lineTo(-15, -7.5);
                lineTo(15, 0);
            }
        }
    }
}

// FILE 'Bullet.as'

package  {
    import flash.events.Event;
    import flash.display.MovieClip;
    import Util;

    public class Bullet extends MovieClip {

        public function Bullet(nx, ny, nrotation: Number) {
            // constructor code
            with (this.graphics) {
                lineStyle (1, 0x000000, 1);
                drawRect(-5, -2, 10, 4);
            }

            this.x = nx;
            this.y = ny;
            this.rotation = nrotation;

            this.addEventListener(Event.ENTER_FRAME, on_enterframe);
        }

        private function on_enterframe(e: Event) {
            if (this.x<=0 || this.x>=550 || this.y<=0 || this.y>=400) {
                this.removeEventListener(Event.ENTER_FRAME, on_enterframe);
                this.stage.removeChild(this);
            } else {
                this.x += Math.cos(Util.deg2rad(this.rotation))*7;
                this.y += Math.sin(Util.deg2rad(this.rotation))*7;
            }
        }
    }
}

// FILE 'Util.as'

package  {
    public class Util {
        public static function deg2rad(deg:Number):Number {
            return Math.PI*deg/180.0;
        }
    }
}