Comments on: ARToolKit を Flash に移植したよ。

By: Srikanth

Srikanth — Mon, 15 Mar 2010 12:40:17 +0000

Hi.. i want to work with NyARToolkit..
Could you please give me some guidelines.

Thanks

Srikanth

By: Saqoosha

Saqoosha — Mon, 15 Mar 2010 02:07:55 +0000

Hi Tom,
It’s impossible to use other than the square for the marker in FLARToolKit. But you can design inside of square. Please refer http://saqoosha.net/2008/06/05/676/ (currently in Japanese only, sorry.)

By: Tom

Tom — Mon, 15 Mar 2010 16:31:02 +0000

Hi, I’ve just looked into this and it stuff is sweet.
I’ve got a question thou. Is it possible to use a different marker rather than a square? I was thinking using a circle with a dash across it like the London underground logo:
http://subtitlestocinema.files.wordpress.com/2008/11/london_underground_logo.jpg
Any ideas how to achieve that?

Thanks

By: Jay

Jay — Mon, 15 Mar 2010 18:26:31 +0000

in response to psilos.

i’ve had mixed results using the multimarker class. Basically what it does is take an array of markers and loops through them looking for the ar marker.
but it doesnt work as well as the simple marker and I still havent figure out why. maybe something wrong with my code.

heres what i’ve done:

1. load 2 or more markers

var codes:Array = new Array();
var widths:Array = new Array();

_code = new FLARCode(16, 16);
_code.loadFromURL(“../Data/marker1.pat”);
codes.push(_code);

_code = new FLARCode(16, 16);
_code.loadFromURL(“../Data/marker2.pat”);
codes.push(_code);

widths.push(MARKER_SIZE);
widths.push(MARKER_SIZE);

this._ctx.mdetector = new FLARMultiMarkerDetector(this._param, codes, widths);

2. then create a nodes array and push the Flar nodes into it:
nodes.push(this._scene.addChild(new FLARBaseNode()));

3. create papervision objects and add them as childs of the nodes created:
nodes[0].addChild(new Plane(wmat, MARKER_SIZE, MARKER_SIZE));
nodes[1].addChild(new Plane(wmat, MARKER_SIZE, MARKER_SIZE));

4. in your application loop check which markers are being detected:

var i:int = nodes.length;
while (i– > 0)
{
nodes[i].visible = false;
if (this._ctx.mdetector.detectMarkerLite(this._ctx.raster, 100) && this._ctx.mdetector.getConfidence(i) > 0.5)
{
trace(i + ” ” + this._ctx.mdetector.getConfidence(i));
this._ctx.mdetector.getTranslationMatrix(i,this._ctx.resultMat);
nodes[i].visible = true;
nodes[i].setTranslationMatrix(this._ctx.resultMat);
}
}

By: Saqoosha

Saqoosha — Mon, 15 Mar 2010 15:48:44 +0000

to psilos.
The class org.libspark.flartoolkit.detector.FLARDetectMarker is for multi marker detection. but I have not used this class.
If you succeed, please report!

By: psilos

psilos — Mon, 15 Mar 2010 10:07:04 +0000

Hey Tom, I had the same problem. The proper svn address would be http://www.libspark.org/svn/as3/FLARToolKit/trunk.

Good luck

By: psilos

psilos — Mon, 15 Mar 2010 10:05:03 +0000

Is it possible to detect more than one markers at the moment? I have seen the samples and its using SingleMarkerDetector. Is there any example with more than one markers?

Thanks in advance!

By: Tom

Tom — Mon, 15 Mar 2010 13:24:32 +0000

Hi!

That’s really great work!
Unfortunately I only can watch the demo. I tried to checkout (with subversion) the files but I always get an error “XML data was not well-formed”. Did I do a mistake or isn’t the code located at http://www.libspark.org/browser/as3/FLARToolKit/trunk/ anymore?
I’d really be glad to have a look at it too!
Thanks a lot!

Tom

By: Timbo

Timbo — Mon, 15 Mar 2010 15:43:08 +0000

hi Taniss, I have the same problem.
can you contact me : tim_timmers @@@ hotmail dot com ?

Thanks!

Sweet work Saqoosha!

By: taniss

taniss — Mon, 15 Mar 2010 15:09:22 +0000

thanks, I already fixed it. The problem is that when only one marker is on the screen, the SingleMarkerDetector takes it as the correct marker. What I did, is force the script to check the level of confidence, not against another marker on screen (since of course ther isn’t another), but to check against an average value (for example, I set 0.65). I’m getting really good results with that, actually if I point my camera to a marker that is not the one I loaded, nothing is drawn on the screen. Wich is what I needed, of course. Anything you need, please write me an e-mail, i’ll be glad to answer, and once again, congratulations for your work.