flash on 2010-11-5
「ActionScript3.0」アニメーション参照
/**
* Copyright flydk83 ( http://wonderfl.net/user/flydk83 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/6zyV
*/
// forked from hacker_szoe51ih's spring ball
//「ActionScript3.0」アニメーション参照
package
{
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
[SWF(width="465", height="465", frameRate="30", backgroundColor="0xffffff")]
public class Main extends Sprite
{
private var ball0:Ball;
private var ball1:Ball;
private var ball0Dragging:Boolean = false;
private var ball1Dragging:Boolean = false;
private var springGraphic:Spring;
private var spring:Number = 0.04;
private var gravity:Number = .5;
private var friction:Number = 0.95;
private var springLength:Number = 200;
private var bounce:Number = -0.7;
public function Main()
{
init();
}
private function init():void
{
springGraphic = addChild(new Spring()) as Spring;
ball0 = new Ball(20,0x000000);
ball0.x = Math.random() * stage.stageWidth;
ball0.y = Math.random() * stage.stageHeight;
ball0.addEventListener(MouseEvent.MOUSE_DOWN, downHandler);
addChild(ball0);
ball1 = new Ball(20,0x000000);
ball1.x = Math.random() * stage.stageWidth;
ball1.y = Math.random() * stage.stageHeight;
ball1.addEventListener(MouseEvent.MOUSE_DOWN, downHandler);
addChild(ball1);
addEventListener(Event.ENTER_FRAME, onEnterFrame);
stage.addEventListener(MouseEvent.MOUSE_UP, upHandler);
}
private function onEnterFrame(event:Event):void
{
if(!ball0Dragging)
{
springTo(ball0, ball1);
}
if(!ball1Dragging)
{
springTo(ball1, ball0);
}
springGraphic.x = ball0.x;
springGraphic.y = ball0.y;
springGraphic.rotation = 180 * Math.atan2(ball1.y - ball0.y, ball1.x - ball0.x) / Math.PI;
springGraphic.length = Math.sqrt((ball1.x - ball0.x) * (ball1.x - ball0.x) + (ball1.y - ball0.y) * (ball1.y - ball0.y));
/*
graphics.clear();
graphics.lineStyle(1);
graphics.moveTo(ball0.x, ball0.y);
graphics.lineTo(ball1.x, ball1.y);
*/
}
private function springTo(ballA:Ball, ballB:Ball):void
{
var dx:Number = ballB.x - ballA.x;
var dy:Number = ballB.y - ballA.y;
var angle:Number = Math.atan2(dy, dx);
var targetX:Number = ballB.x - Math.cos(angle) * springLength;
var targetY:Number = ballB.y - Math.sin(angle) * springLength;
ballA.vx += (targetX - ballA.x) * spring;
ballA.vy += (targetY - ballA.y) * spring;
ballA.vx *= friction;
ballA.vy *= friction;
ballA.vy+=gravity;
ballA.x += ballA.vx;
ballA.y += ballA.vy;
var left:Number = 0;
var right:Number = stage.stageWidth;
var top:Number = 0;
var bottom:Number = stage.stageHeight;
if(ballA.x + ballA.radius > right)
{
ballA.x = right - ballA.radius;
ballA.vx *= bounce;
}
else if(ballA.x - ballA.radius < left)
{
ballA.x = left + ballA.radius;
ballA.vx *= bounce;
}
if(ballA.y + ballA.radius > bottom)
{
ballA.y = bottom - ballA.radius;
ballA.vy *= bounce;
}
else if(ballA.y - ballA.radius < top)
{
ballA.y = top + ballA.radius;
ballA.vy *= bounce;
}
if(ballB.x + ballB.radius > right)
{
ballB.x = right - ballB.radius;
ballB.vx *= bounce;
}
else if(ballB.x - ballB.radius < left)
{
ballB.x = left + ballB.radius;
ballB.vx *= bounce;
}
if(ballB.y + ballB.radius > bottom)
{
ballB.y = bottom - ballB.radius;
ballB.vy *= bounce;
}
else if(ballB.y - ballB.radius < top)
{
ballB.y = top + ballB.radius;
ballB.vy *= bounce;
}
}
private function downHandler(event:MouseEvent):void
{
event.target.startDrag();
if(event.target == ball0)
{
ball0Dragging = true;
}
if(event.target == ball1)
{
ball1Dragging = true;
}
}
private function upHandler(event:MouseEvent):void
{
ball0.stopDrag();
ball1.stopDrag();
ball0Dragging = false;
ball1Dragging = false;
}
}
}
import flash.display.Sprite;
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;
buttonMode=true;
useHandCursor=true;
init();
}
public function init():void {
graphics.beginFill(color);
graphics.drawCircle(0, 0, radius);
graphics.endFill();
}
}
import flash.display.Graphics;
class Spring extends Sprite
{
private var _radius:Number;
private var _numWind:uint;
private var _color:uint;
private var _lineStrength:Number;
private var _length:Number = 200;
private var _ratio:Number = 0.4;
private var _mgn:int = 5;
private var _springGraphic:Sprite;
public function Spring(radius:Number = 100, numWind:uint = 5, lineStrength:Number = 3, color:uint = 0x0)
{
this._radius = radius;
this._numWind = numWind;
this._color = color;
this._lineStrength = lineStrength;
init();
}
private function init():void
{
this._springGraphic = new Sprite();
var g:Graphics = this._springGraphic.graphics;
g.clear();
g.lineStyle(3, this._lineStrength);
g.moveTo(0, 0);
var interval:Number = this.length / (this._numWind + this._mgn * 2);
g.lineTo(interval * this._mgn, 0);
for(var i:int = this._mgn; i < this._numWind + this._mgn; i++)
{
g.curveTo(interval * i, -this._radius, interval * (1 + this._ratio) / 2 + interval * i, -this._radius);
g.curveTo(interval * (1 + this._ratio) + interval * i, -this._radius, interval * (1 + this._ratio) + interval * i, 0);
g.curveTo(interval * (1 + this._ratio) + interval * i, this._radius, interval * (i + 1) + interval * this._ratio / 2, this._radius);
g.curveTo(interval * (i + 1), this._radius, interval * (i + 1), 0);
}
g.lineTo(interval * (this._numWind + this._mgn * 2), 0);
this.addChild(this._springGraphic);
}
public function get length():Number
{
return this._length;
}
public function set length(newLength:Number):void
{
this._length = newLength;
this._springGraphic.width = this._length;
}
}