package
{
    import flash.display.*;
    import flash.events.*;
    import flash.geom.*;
 
    [SWF(backgroundColor="#000000")]
 
    public class astro_sample extends Sprite
    {
        private var view:Sprite;
        private var fov:PerspectiveProjection = new PerspectiveProjection();
        private var vertex:Vector.<Vector3D>;
        private var deg:Number = 0;
        private var dot:Vector.<Sprite> = new Vector.<Sprite>();
        private var pivot:Vector3D = new Vector3D(0,0,0);
        private var wid:Number = 200;
        private var hei:Number = 200;
        private var dep:Number = 200;
 
        public function astro_sample()
        {
            stage.frameRate = 60;
            stage.align = StageAlign.TOP_LEFT;
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.quality = StageQuality.BEST;
 
            init3D();
        }
 
        private function init3D():void
        {
            view = new Sprite();
            addChild(view);
            view.x = stage.stageWidth >> 1;
            view.y = stage.stageHeight >> 1;
            view.z = 0;
 
            //視野角の設定
            fov.fieldOfView = 55;
 
            //頂点の定義
            vertex = Vector.<Vector3D>
            ([
                new Vector3D(-wid/2, +hei/2, -dep/2),
                new Vector3D(+wid/2, +hei/2, -dep/2),
                new Vector3D(+wid/2, -hei/2, -dep/2),
                new Vector3D(-wid/2, -hei/2, -dep/2),
                new Vector3D(-wid/2, +hei/2, +dep/2),
                new Vector3D(+wid/2, +hei/2, +dep/2),
                new Vector3D(+wid/2, -hei/2, +dep/2),
                new Vector3D(-wid/2, -hei/2, +dep/2)
            ]);
 
            //表示オブジェクト定義
            for (var i:int = 0; i < 8; i++)
            {
                var s:Sprite = new Sprite();
                view.addChild(s);
                s.graphics.beginFill(0x0099CC);
                s.graphics.drawCircle(0, 0, 5);
                s.graphics.endFill();
                dot.push(s);
            }
 
            stage.addEventListener(Event.RESIZE, onStageResize);
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
        }
 
        //Render Loop
        private function onEnterFrame(event:Event):void
        {
            //回転角度を増加
            deg++;
 
            var matrix:Matrix3D = new Matrix3D();
            //回転行列生成
            matrix.appendRotation(deg, Vector3D.Y_AXIS, pivot);
            matrix.appendRotation(deg, Vector3D.Z_AXIS, pivot);
 
            var vs:int = vertex.length;
            for(var i:int = 0; i < vs; i++ )
            {
                //座標変換
                var v:Vector3D = matrix.transformVector(vertex[i]);
                v.w = fov.focalLength / (fov.focalLength + v.z);
                v.project();
 
                //表示オブジェクト座標に割り当て
                dot[i].x = v.x;
                dot[i].y = v.y;
            }
        }
 
        private function onStageResize(event:Event):void
        {
            view.x = stage.stageWidth >> 1;
            view.y = stage.stageHeight >> 1;
        }
 
    }
}