Re: [squeak-dev] Re: Kinect and Etoys

can you add an entry to 

http://code.google.com/p/pharo/issues/list

?

thanks,

Marcus

On Jan 20, 2011, at 4:55 PM, Ricardo Moran wrote:

I think I found the cause of the problem: I'm updating the position of each morph inside a WorldState>>#addDeferredUIMessage:. In Pharo, this seems to be really slow. You can test it by executing this:

| rnd |

rnd := Random new.

100 timesRepeat: [

WorldState addDeferredUIMessage: [

Morph new openInWorld; center: rnd next @ rnd next * Display extent.

]

].

You'll notice it takes a couple of seconds to finish opening all the morphs, but if you remove the #addDeferredUIMessage: send, it is instantaneous. In Squeak and Etoys both versions are equally fast.

I looked at it a little, and I think Pharo has a bug in WorldState>>#runStepsMethodsIn:. It seems it only executes one deferred ui message per step. With the implementation below the problem is fixed.

WorldState>>#runStepMethodsIn: aWorld

"Perform periodic activity inbetween event cycles"

| queue nextInQueue|

"If available dispatch some deferred UI Message"

queue := self class deferredUIMessages.

[(nextInQueue := queue nextOrNil) isNil]

whileFalse: [ nextInQueue value].

self runLocalStepMethodsIn: aWorld.

Best regards,

Richo

On Wed, Jan 19, 2011 at 6:40 PM, Ricardo Moran <[hidden email]> wrote:

The latest stable 1.1.1. I will look at it tomorrow and try to find out more.

On Wed, Jan 19, 2011 at 6:38 PM, Stéphane Ducasse <[hidden email]> wrote:

hi ricardo,

which version are you using?

Stef

On Jan 19, 2011, at 10:32 PM, Ricardo Moran wrote:

> I forgot to say it works in Squeak and Pharo (although in Pharo it's *painfully* slow, I don't know why yet...)
>
> Cheers
> Richo
>
> On Wed, Jan 19, 2011 at 6:04 PM, Ricardo Moran <[hidden email]> wrote:
> Hi guys!
> I want to tell you some exciting news. Thanks to the ESUG Innovation Technology Awards we've been able to buy ourselves a Microsoft Kinect. We don't have a Xbox 360 yet, but that doesn't mean we can't have a little fun with it. Who needs and Xbox if you can use Kinect with Etoys? :)
>
> After seeing Stephen Howell's great work using Kinect with Scratch, we followed his steps and made it available for Etoys as well.
> See it for yourselves: http://www.youtube.com/watch?v=YnqqaHvbeqg
>
> You can find installation steps in our blog: http://tecnodacta.com.ar/gira
>
> Cheers!
> Richo
>
>

--

Marcus Denker  -- http://www.marcusdenker.de
INRIA Lille -- Nord Europe. Team RMoD.