package { import flash.display.Sprite; import flash.events.Event; import org.papervision3d.cameras.Camera3D; import org.papervision3d.materials.ColorMaterial; import org.papervision3d.render.BasicRenderEngine; import org.papervision3d.scenes.Scene3D; import org.papervision3d.view.Viewport3D; import org.papervision3d.objects.DisplayObject3D; import org.papervision3d.objects.primitives.Plane; [SWF(backgroundColor="#EEEEEE", frameRate=30)] public class Main extends Sprite { private var camera:Camera3D; private var scene:Scene3D; private var viewport:Viewport3D; private var renderer:BasicRenderEngine; private var _plane1:Plane; private var _plane2:Plane; private var _container:DisplayObject3D; private var _num:Number = 0; private var _a:Number = 0.05; public function Main() { scene = new Scene3D(); viewport = new Viewport3D(465, 465, true, true); renderer = new BasicRenderEngine(); camera = new Camera3D(); addChild(viewport); init(); } private function init():void { var material:ColorMaterial = new ColorMaterial(0x000000); material.oneSide = false; //普通のPlane _plane1 = new Plane(material, 300, 300); _plane1.x = -300; _plane1.useOwnContainer = true; scene.addChild(_plane1); //入れ子にしたPlane _container = new DisplayObject3D(); _plane2 = new Plane(material, 300, 300); _plane2.x = 300; _plane2.useOwnContainer = true; scene.addChild(_container); _container.addChild(_plane2); //↓この一行をコメントアウトするとalphaが指定できるようになる _container.useOwnContainer = true; addEventListener(Event.ENTER_FRAME, renderHandler); } private function renderHandler(e:Event):void { _plane1.rotationY += 2; _plane2.rotationY += 2; //透明度を変える _plane1.alpha = _num; _plane2.alpha = _num; //_containerはalpha効く //_container.alpha = _num _num += _a; if (_num > 1) { _a = -0.05; }else if (_num < 0) { _a = 0.05; } renderer.renderScene(scene, camera, viewport); } } }