Forked from:: shinh's circle pong

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forked:2
favorite:4
lines:95
license : All rights reserved
modified : 2009-02-01 11:18:42

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package {
    import flash.display.*;
    import flash.text.*;
    import flash.events.*;
    public class FlashTest extends Sprite {
        private var screen:BitmapData;
        private const W:int = 465, H:int = 465;
        private var cnt:int;
        private var running:Boolean;
        private var wall:Shape = new Shape();
        private var balls:Array = new Array();
        private var score:TextField;
        private var text:TextField;
        private function makeTextField(x:int, y:int, s:int):TextField {
            var t:TextField = new TextField();
            t.x = x;
            t.y = y;
            t.width = W;
            t.height = H;
            var fm:TextFormat = new TextFormat;
            fm.color = 0xffffff;
            fm.font = '_typewriter';
            fm.size = s;
            fm.bold = true;
            t.defaultTextFormat = fm;
            return t;
        }
        public function FlashTest() {
            this.addEventListener(Event.ENTER_FRAME, update);
            screen = new BitmapData(W, H, false, 0);
            addChild(new Bitmap(screen));
            wall.graphics.beginFill(0xffffff);
            wall.graphics.drawRect(-4, -4, 9, 9);
            addChild(wall);
            addChild(score = makeTextField(10, 10, 20));
            score.text = '0';
            addChild(text = makeTextField(110, 200, 30));
            stage.addEventListener(MouseEvent.CLICK, init);
            running = true;
        }
        public function createBall(a:Number): void {
            var ball:Shape = new Shape();
            ball.graphics.beginFill(0xffffff);
            ball.graphics.drawCircle(0, 0, 4);
            addChild(ball);
            ball.x = W / 2;
            ball.y = H / 2;
            var t:Number = Math.PI * cnt / 300;
            var r:Number = Math.PI * 2 * Math.pow(Math.sin(t), 2);
            balls.push(new Array(ball, Math.random() * 3 + 2,
                                 a + Math.random() * r - r / 2));
        }
        public function init(event:MouseEvent): void {
            if (running) return;
            running = true;
            score.text = '' + (cnt = 0);
            text.text = '';
        }
        public function update(event:Event): void {
            var a:Number = Math.atan2(stage.mouseX - W / 2,
                                      stage.mouseY - H / 2);
            wall.rotation = - a / 3.141592 * 180;
            wall.x = W / 2 + Math.sin(a) * 200;
            wall.y = H / 2 + Math.cos(a) * 200;
            var nballs:Array = new Array();
            for (var i:int = 0; i < balls.length; i++) {
                var ball:Shape = balls[i][0];
                var bx:Number = ball.x - W / 2;
                var by:Number = ball.y - H / 2;
                var da:Number = Math.abs(Math.atan2(bx, by) - a);
                if ((da < 0.02 || da > Math.PI * 2 - 0.02) &&
                    Math.abs(Math.sqrt(bx*bx + by*by) - 200) < 4) {
                    text.text = '  GAME OVER\nCLICK TO START';
                    running = false;
                }
                ball.x += balls[i][1] * Math.sin(balls[i][2]);
                ball.y += balls[i][1] * Math.cos(balls[i][2]);
                if (ball.x > 0 && ball.x < W &&
                    ball.y > 0 && ball.y < H) {
                    nballs.push(balls[i]);
                }
                else {
                    removeChild(ball);
                }
            }
            balls = nballs;
            var n:Number = cnt * Math.random() / 300;
            for (i = 0; i <= n; i++) {
                if (running) createBall(a);
            }
            score.text = 'SCORE: ' + (cnt += running ? 1 : 0) +
                         '\nOBJS : ' + balls.length;
        }
    }
}

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