package { import Box2D.Common.Math.b2Vec2; import com.actionsnippet.qbox.objects.CircleObject; import com.actionsnippet.qbox.QuickBox2D; import flash.display.BlendMode; import flash.display.MovieClip; import flash.display.Sprite; import flash.display.StageQuality; import flash.events.Event; /** * ... * @author paq89 */ [SWF(backgroundColor="0xFFFFFF", width=465, height=465, frameRate=60)] public class Main extends Sprite { private var _qbox:QuickBox2D; private var _softbody:/*SoftBody*/Array = []; public function Main():void { if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(e:Event = null):void { removeEventListener(Event.ADDED_TO_STAGE, init); // クオリティーを低に stage.quality = StageQuality.LOW; // QuickBox2Dを表示するMovieClipを作成 var mc:MovieClip = new MovieClip(); addChild(mc); // QuickBox2Dを作成 _qbox = new QuickBox2D(mc); // 色の設定 _qbox.setDefault( { lineAlpha:0, fillColor:0 } ); _qbox.createStageWalls(); _qbox.mouseDrag(); _qbox.start(); // 箱を2つ作成 _qbox.addBox( { x:10, y:1, width:1, height:1 } ); _qbox.addBox( { x:12, y:1, width:2, height:2 } ); // Alphaを0にして見えないようにする _qbox.setDefault( { lineAlpha:0, fillAlpha:0 } ); for (var i:int = 0; i < 2; i++) { _softbody[i] = new SoftBody(_qbox, { x:i * 3 + 4, y:7, lineAlpha:0, fillColor:0xFFFFFF * Math.random(), radius:i + 1 } ); addChild(_softbody[i]); } // イベントリスナー addEventListener(Event.ENTER_FRAME, loop); } private function loop(e:Event):void { for each (var sb:SoftBody in _softbody) { sb.update(); } } } } import flash.display.Sprite; import Box2D.Common.Math.b2Vec2; import com.actionsnippet.qbox.QuickBox2D; import com.actionsnippet.qbox.objects.CircleObject; import com.actionsnippet.qbox.QuickObject; class Anchor extends CircleObject { private var vx:Number = 0; private var vy:Number = 0; private var spring:Number = 2; private var friction:Number = 0.1; private var vec:b2Vec2; public var target:QuickObject; private var rot:Number; public function Anchor(qbox:QuickBox2D, params:Object, target:QuickObject = null, rot:Number = 0) { super(qbox, params); this.target = target; this.rot = rot; vec = new b2Vec2(); } public function update():void { if (!target) return; var targetPos:b2Vec2 = target.body.GetPosition(); var thisPos:b2Vec2 = body.GetPosition(); var dx:Number = Math.sin(rot * Math.PI / 180)*2 + targetPos.x - thisPos.x; var dy:Number = Math.cos(rot * Math.PI / 180)*2 + targetPos.y - thisPos.y; var ax:Number = dx * spring; var ay:Number = dy * spring; vx += ax; vy += ay; vec.x = vx; vec.y = vy; body.ApplyForce(vec, thisPos); vx *= friction; vy *= friction; } } class SoftBody extends Sprite { public var params:Object; private var _anchor:/*Anchor*/Array = []; private var qbox:QuickBox2D; public function SoftBody(qbox:QuickBox2D, params:Object) { this.params = params; this.qbox = qbox; if (this.params.lineColor == null) this.params.lineColor = 1; if (this.params.lineAlpha == null) this.params.lineAlpha = 1; if (this.params.fillColor == null) this.params.fillColor = 0; if (this.params.fillAlpha == null) this.params.fillAlpha = 1; if (this.params.radius == null) this.params.radius = 1; create(); } private function create():void { var rot:Number = 0; for (var i:int = 0; i < 18; i++) { rot+=20; _anchor[i] = new Anchor(qbox, { x:Math.sin(rot * Math.PI / 180) * params.radius + params.x, y:Math.cos(rot * Math.PI / 180) * params.radius + params.y, radius:0.1 }, _anchor[i - 1], rot); _anchor[i].shape.m_radius = 0.1 * params.radius; if (i != 0) qbox.addJoint( { type:QuickBox2D.DISTANCE, a:_anchor[i-1].body, b:_anchor[i].body } ); } qbox.addJoint( { type:QuickBox2D.DISTANCE, a:_anchor[0].body, b:_anchor[_anchor.length-1].body } ); } public function update():void { graphics.clear(); graphics.beginFill(params.fillColor, params.fillAlpha); graphics.lineStyle(1, params.lineColor, params.lineAlpha); graphics.moveTo(_anchor[1].x * 30, _anchor[1].y * 30); var len:uint = _anchor.length; for (var i:int = 1; i < len; i++) { _anchor[i].update(); graphics.lineTo(_anchor[i].x * 30, _anchor[i].y * 30); } graphics.lineTo(_anchor[1].x * 30, _anchor[1].y * 30); } }