Dau chi rieng minh em

import org.papervision3d.scenes.*;
import org.papervision3d.cameras.*;
import org.papervision3d.objects.*;
import org.papervision3d.materials.*;

var sp:Sprite = new Sprite();
this.addChild(sp);
sp.x = 320;
sp.y = 200;

var radius:int = 800;

var s:Scene3D = new Scene3D(sp);
var cam:Camera3D = new Camera3D();
cam.z = -150;

var center:Plane = new Plane();
s.addChild(center);
center.visible = false;

var bmd:BitmapData = new BitmapData(320, 240);
var bmd2:BitmapData = new BitmapData(320, 240);
var bmd3:BitmapData = new BitmapData(320, 240);
var bmd4:BitmapData = new BitmapData(320, 240);

var mat1:BitmapMaterial = new BitmapMaterial(bmd);
mat1.oneSide = false;
var plane1:Plane = new Plane(mat1,320, 240, 5, 5);
plane1.x = Math.cos(Math.PI*2) * radius;
plane1.z = Math.sin(Math.PI*2) * radius;
plane1.rotationY = 270;

var mat2:BitmapMaterial = new BitmapMaterial(bmd2);
mat2.oneSide = false;
var plane2:Plane = new Plane(mat2,320, 240);
plane2.x = Math.cos(Math.PI/2) * radius;
plane2.z = Math.sin(Math.PI/2) * radius;
plane2.rotationY = 180;

var mat3:BitmapMaterial = new BitmapMaterial(bmd3);
mat3.oneSide = false;
var plane3:Plane = new Plane(mat3,320, 240);
plane3.x = Math.cos(Math.PI) * radius;
plane3.z = Math.sin(Math.PI) * radius;
plane3.rotationY = 90;

var mat4:BitmapMaterial = new BitmapMaterial(bmd4);
mat4.oneSide = false;
var plane4:Plane = new Plane(mat4,320, 240);
plane4.x = Math.cos(Math.PI*1.5) * radius;
plane4.z = Math.sin(Math.PI*1.5) * radius;
plane4.rotationY = 0;

s.addChild(plane1);
s.addChild(plane2);
s.addChild(plane3);
s.addChild(plane4);

this.addEventListener(Event.ENTER_FRAME, render);


var angle:Number = 0;

function render(e:Event)
{
angle += (this.mouseX - 320) * 0.001;
cam.x = Math.cos(angle) * 900;
cam.z = Math.sin(angle) * 900;
cam.target = center;
bmd.draw(vid1.v);
bmd2.draw(vid2.v);
bmd3.draw(vid3.v);
bmd4.draw(vid4.v);
mat1.updateBitmap();
mat2.updateBitmap();
mat3.updateBitmap();
mat4.updateBitmap();
s.renderCamera(cam);
}

vid1.visible = false;
vid2.visible = false;
vid3.visible = false;
vid4.visible = false;