Comments on: Touchlib’s TUIO Actionscript 3 Classes Enhanced With Fiducial Support (Source Code)

By: johannes

johannes — Tue, 27 Mar 2012 04:17:33 +0000

@Anne I would do it as you said: draw a sprite under each prop and check after each movement whether both sprites hit each other, e.g. via http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/DisplayObject.html#hitTestObject()

By: Anne

Anne — Mon, 12 Mar 2012 23:49:14 +0000

Hello Johannes, thanks for sharing the code! Really help me on my project.

I have different Handler actionscript for different fiducial prop.
How can I make two different fiducial to react to each other?

I tried hit test many times but error access was undefined.

Hope you can help.

By: johannes

johannes — Thu, 23 Feb 2012 20:43:39 +0000

can i programme by using fiduicialtuio as3 classes only for the touch

yes, you can.

but how do I make it interact with another movie clip on stage

I’m afraid you have to figure this out on your own…

By: Bella

Bella — Thu, 23 Feb 2012 14:08:22 +0000

hi again, can i programme by using fiduicialtuio as3 classes only for the touch?
The blobs can be detected by using reactivision, but how do I make it interact with another movie clip on stage?

Thanks again

By: johannes

johannes — Fri, 17 Feb 2012 22:05:57 +0000

hi bella,
as soon as you get a touch (or blob) on your table that is detected by an open source tracking software like CCV, touchlib or touché, the tracking software sends the detected touch via TUIO protocol over the network to connected applications. usually, the applications and the tracking software run on the same computer but nonetheless the touch is sent via TUIO over localhost to the application. Now, your application has to decide what to do with the received TUIO message. There are quite a few programming libraries that support TUIO (actually I am a co-author of the TUIO programming library TUIO AS3 for Flash). you can develop your own applications based on TUIO or you can download a few demo applications that use TUIO.

if you want to use touches as mouse clicks, you can translate blobs to mouse clicks (at least as far as i know) with the tracking software touchlib. however, this feels really awkward and i would not recommend to do this because there can be many touches at once on a table (hence ‘multi-touch’) so your mouse cursor would jump all the time.

hope i could help you.

cheers

By: bella

bella — Fri, 17 Feb 2012 21:58:13 +0000

Thanks for replying,

I am planning to build an interactive table, I am able to work out the fiducial but I can’t understand the multitouch.

When I touch the table, does it mean the blob works as a cursor?
I don’t know how to make blob interact with an object on stage.

By: johannes

johannes — Fri, 17 Feb 2012 21:54:31 +0000

Could you be a bit more precise with your question? I have not understood what you want to know from me… sorry!

By: bella

bella — Fri, 17 Feb 2012 15:25:50 +0000

Hi Johannes, how do I replace finger tracking as mouse?
please and thank you..

By: johannes

johannes — Thu, 03 Dec 2009 09:58:54 +0000

hi jacob,
are the light pens working with infrared light (just like the ones from johnny chung lee did)?

if so, i see problems when you are trying to discern touches from pen interaction because e.g. the Touchlib, CCV or Touché will recognize both as touch interaction. if you are only using light pen interaction it should however work fine. if you want to use mouseOver functionality just create a listener like this in the class that offers the mouseOver functionality:

1	addEventListener(TouchEvent.MOUSE_OVER, listenerFunction);

The MOUSE_OVER event is being triggered in tuio.TUIOObject in line 89.

>> Also how to remove the red circles(blob indicators) from the scene.
In the class tuio.TUIOCursor in lines 10-17 the circles are being drawn. You can just delete those lines if you don’t need the circles. But the circles are grey and not red, aren’t they?

By: Jacob

Jacob — Thu, 03 Dec 2009 09:35:36 +0000

Hi johannes,

First of, great work!
We are currently programming a multitouch project where we have to use light pens to write in a flash app. when using your libs we get all the blobs into our flash app. but we would like it to use a “mouseOver” function, do you know a way to do so?
Also how to remove the red circles(blob indicators) from the scene.

Hope you can help

Jacob