Black screen Broomstick

[kyma]

I've been having fun playing with the broomstick examples. When I
tried to begin a project from scratch though, I'm juts getting a black
screen. I can't see any objects. I have checked, and they are
definitely being added to the display list, but I can't see them. Is
there anything I need to set up in my camera/scene, or can anyone
offer any tips for debugging this, because I'm currently a bit stuck

[John Brookes]

Unless this is some guessing game.

Tip 1
post the code

[kyma]

:-) Yep sorry, that was a desperate plea for help and not very useful.
My view component:

package com.netaporter.napLive.views
{

import away3d.cameras.Camera3D;
import away3d.containers.Scene3D;
import away3d.containers.View3D;
import away3d.core.render.DefaultRenderer;
import away3d.materials.ColorMaterial;
import away3d.materials.WireframeMaterial;
import away3d.primitives.Sphere;

import flash.events.Event;

import mx.core.UIComponent;

public class AwayView extends UIComponent
{
public var view:View3D
public var _scene:Scene3D = new Scene3D();
private var _camera:Camera3D = new Camera3D();

protected var viewWidth:Number;
protected var viewHeight:Number;

public function AwayView()
{
view = new View3D(_scene,_camera);
super();
}

public function setDimensions(_width:Number,_height:Number):void {
viewWidth = _width;
viewHeight = _height;
update();
}

public function set camera(cam:Camera3D):void {
this.view.camera = cam;
}

public function get camera():Camera3D {
return this.view.camera;
}

override protected function createChildren():void
{
super.createChildren();
this.addChild( view );
view.addEventListener(Event.ADDED_TO_STAGE, update);
}

override protected function updateDisplayList(unscaledWidth:Number,
unscaledHeight:Number):void
{
super.updateDisplayList(unscaledWidth, unscaledHeight);
update();
}

private function update(e:* = null):void
{
if(view.stage){
view.x = viewWidth/2;
view.y = viewHeight/2;
view.render();
view.addEventListener(Event.ENTER_FRAME,enterFrameHandler);
}
}

private function enterFrameHandler(e:Event):void {
view.render();

[kyma]

Then I'm trying to set up a background. For the moment, just adding a
sphere as a test. Passing my view component to this controller:

package com.netaporter.napLive.control
{
import away3d.materials.ColorMaterial;
import away3d.primitives.Sphere;

import com.netaporter.napLive.displayObjects.NapBackground;
import com.netaporter.napLive.views.NapliveView;

import flash.events.EventDispatcher;

public class BackgroundControl extends ANapLiveControl
{
private var bg:NapBackground;
public function BackgroundControl(_viewCom:NapliveView,
_dispatcher:EventDispatcher)
{
super(_viewCom, _dispatcher);
}

override protected function initDisplayObjects():void {
bg = new NapBackground();
var test:Sphere= new Sphere(new ColorMaterial(0xffffff,1));
this.view.mainContainer.addChild(test);

[kyma]

The I've got a similar controller for the camera, that just moves it
to -500 z and tells it to look at the centre.

[John Brookes]

And they say mvc makes things simpler :/

Pass.

[Michael Iv]

I am not sure MVC is always a good choice for this kind of apps
.BTW , John have you solved the problem with rotations?

On Thu, Apr 7, 2011 at 4:02 PM, John Brookes <jbp...@googlemail.com> wrote:

And they say mvc makes things simpler :/

Pass.

--

Michael Ivanov ,Programmer
Neurotech Solutions Ltd.
Flex|Air |3D|Unity|
www.neurotechresearch.com
http://blog.alladvanced.net
Tel:054-4962254
mic...@neurotech.co.il
te...@neurotech.co.il

[John Brookes]

@Michael
Facial twitch appears again starts rocking back and forward.
No :(
Sort of hidden it away before I go insane.
But feel free to make me go DOH.

[Michael Iv]

If you can send me the code in private i can take a look at the evening . :)

[John Brookes]

Kyma not sure what your doing but check that the render actually fires.
just trace in the enterframe.

Also I've no idea what the sphere is being added to
this.view.mainContainer.addChild(test);

view.scene.addChild(test)?

or what NapBackground is.

Sorry, other than that not a clue.

[kyma]

I solved this by removing all the flex bits. It's probably something
in my implementation but I couldn't get anything to work in a Flex
UIComponent. I can work around it for now, but I'd be interested to
know if anyone else has had Broomstick working in Flex components, or
whether this is a bug.
Like I say, it's most likely something stupid I was doing. Thanks a
lot for your suggestions everyone. Incidentally, aside from the last
few hours' frustrations, I don't think I've ever had so much fun at
work. Everything looks so smooth and runs so quickly. Incredible
work devs :-)

[Li]

I think the Adobe PB3D examples use Flex.

[Justin Patrin]

Actually this is because the 3D stuff happens in a layer beneath the flex components. You just need to set your Application's backgroundAlpha to 0.

Yeah, it took me forever to figure that out too.

--
Justin Patrin
Developer Extraordinaire

[Stephen Hopkins]

wow, spent like 4 hours trying to figure this out until now. Thanks
justin. Is this a bug with flex?

[richardolsson]

Molehill by design renders the 3D behind everything (except
StageVideo, which is even further down the stack.) Flex by design
works only with the display list, so if Flex draws a background it's
gonna be over StageVideo and Stage3D (Molehill.) Hence, you need to
prevent Flex from drawing a background.

The View3D is a display object, but it can't actually be used to move
the view around in the display list. The main reason that it's a
display object is actually legacy reasons.

Bottom line is, Molehill will always render 3D behind the display
list, so don't try to draw a background gradient or anything like that
in the display list, as it will always obscur your 3D canvas.


Cheers
/R