[Study] AS 3.0 Animation ch05_04

by nmrtmnr 28 Jun 2015

Embed

/**
 * Copyright nmrtmnr ( http://wonderfl.net/user/nmrtmnr )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/qBGQ
 */

package {
  import flash.display.Sprite;
  import flash.text.TextField;
  import flash.events.Event;

  public class FollowMouse extends Sprite {
    private var arrow:Arrow;
    private var speed:Number = 5;

    public function FollowMouse() {
      init();

      var textField:TextField = new TextField();
      addChild(textField);
      textField.x = 10;
      textField.y = 10;
      textField.width = stage.stageWidth;
      textField.height = 20;

      textField.text = 'マウスを追いかける';
    }

    private function init():void {
      arrow = new Arrow();
      addChild(arrow);
      addEventListener(Event.ENTER_FRAME, onEnterFrame);
    }

    private function onEnterFrame(event:Event):void {
      var dx:Number = mouseX - arrow.x;
      var dy:Number = mouseY - arrow.y;
      var angle:Number = Math.atan2(dy, dx);
      arrow.rotation = angle * 180 / Math.PI;
      var vx:Number = Math.cos(angle) * speed;
      var vy:Number = Math.sin(angle) * speed;
      arrow.x += vx;
      arrow.y += vy;
    }
  }
}



import flash.display.Sprite;

// Arrowクラス
class Arrow extends Sprite {
  public function Arrow() {
    init();
  }

  private function init():void {
    graphics.lineStyle(1, 0, 1);
    graphics.beginFill(0x0000ff);
    graphics.moveTo(-20, -10);
    graphics.lineTo(0, -10);
    graphics.lineTo(0, -20);
    graphics.lineTo(20, 0);
    graphics.lineTo(0, 20);
    graphics.lineTo(0, 10);
    graphics.lineTo(-20, 10);
    graphics.lineTo(-20, -10);
    graphics.endFill();
  }
}
// ↑↑↑

// Ballクラス
class Ball extends Sprite {
  private var radius:Number;
  private var color:uint;

  public function Ball(radius:Number = 40, color:uint=0xff0000) {
    this.radius = radius;
    this.color = color;
    init();
  }

  private function init():void {
    graphics.beginFill(color);
    graphics.drawCircle(0, 0, radius);
    graphics.endFill();
  }
}
// ↑↑↑