[Study] AS 3.0 Animation ch08_10
/**
* Copyright nmrtmnr ( http://wonderfl.net/user/nmrtmnr )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/hTMh
*/
package {
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.text.TextField;
import flash.events.Event;
import flash.events.MouseEvent;
public class ChainArray extends Sprite {
private var balls:Array;
private var numBalls:Number = 5;
private var spring:Number = 0.1;
private var friction:Number = 0.8;
private var gravity:Number = 5;
public function ChainArray() {
init();
var textField:TextField = new TextField();
addChild(textField);
textField.x = 10;
textField.y = 10;
textField.width = stage.stageWidth;
textField.height = 20;
textField.text = 'バネのチェーン (配列版)';
}
private function init():void {
balls = new Array();
for(var i:uint = 0; i < numBalls; i++) {
var ball:Ball = new Ball(20);
addChild(ball);
balls.push(ball);
}
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
public function onEnterFrame(event:Event):void {
graphics.clear();
graphics.lineStyle(1);
graphics.moveTo(mouseX, mouseY);
moveBall(balls[0], mouseX, mouseY);
graphics.lineTo(balls[0].x, balls[0].y);
for(var i:uint = 1; i < numBalls; i++) {
var ballA:Ball = balls[i - 1];
var ballB:Ball = balls[i];
moveBall(ballB, ballA.x, ballA.y);
graphics.lineTo(ballB.x, ballB.y);
}
}
private function moveBall(ball:Ball, targetX:Number, targetY:Number):void {
ball.vx += (targetX - ball.x) * spring;
ball.vy += (targetY - ball.y) * spring;
ball.vy += gravity;
ball.vx *= friction;
ball.vy *= friction;
ball.x += ball.vx;
ball.y += ball.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(0xffff00);
graphics.moveTo(-50, -25);
graphics.lineTo(0, -25);
graphics.lineTo(0, -50);
graphics.lineTo(50, 0);
graphics.lineTo(0, 50);
graphics.lineTo(0, 25);
graphics.lineTo(-50, 25);
graphics.lineTo(-50, -25);
graphics.endFill();
}
}
// ↑↑↑
// Ballクラス
class Ball extends Sprite {
public var radius:Number;
public var color:uint;
public var vx:Number = 0;
public var vy:Number = 0;
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();
}
}
// ↑↑↑