NUI Group - Open Source Interface

Fluid Application

2010-02-09T09:43:29-05:00

Hello!
I’m working on a physics-based graphic engine supporting some interactive animations of free water surfaces at real-time.

Youtube Videos:

[youtube]wnYTPRqf6q4[/youtube]

[youtube]GJWvmwaS0AA[/youtube]

[youtube]vncJY6thnMg[/youtube]

And… of course, Fluid Simulation with touchscreen interaction:

[youtube]LGcy5OyYHmI[/youtube]

The basic algorithm is based on a lattice-Boltzmann model of the shallow-waters equations and the interaction between the surface and external objects is achieved by means of source terms. The engine is capable
of produce scenes of ponds whose surface reacts to perturbations introduced by the user or controlled by the computer, like drizzle or the stirring of a finger.

Some technical data of the implementation:

-Fluid Models Supported: BGK / Entropic Model / Zhou’s SWE
-Grid: The implemented grid is D2Q9
-Realtime Grid Size: 200x200 Grids (including reflection, refraction, cubemaps, user interaction, etc.)
-Boundary Conditions: Zou/He, bounce-back, periodic.
-Parallelism: -

My idea is bring it to the NUI Community and (if you test it) i will probably get some videos and screenshots of possible uses of my project.
I tested multitouch support using TUIO listener and works great!

If you want it, you cand download it from here:
Link: http://www.pladema.net/~cgarcia/resources/LBM.rar

You can use it as you like it in your projects.

Aditionally, this is a basic (& very preliminary) version of a DLL, including the fluid physics module in my demos.
The zip file includes a Visual C++ Project that show you how to use the library, renders a water grid and permits user interaction.
Of course, the visualization in this demo is simple because i don’t use my graphics engine.

Link: http://www.pladema.net/~cgarcia/resources/DLL_Test.zip

Send me an email if you have any question:

http://www.pladema.net/~cgarcia

Regards,
Eng. Cristian Garcia Bauza

these SMD IR LEDS are powerful enough for rearDI ?

2010-02-09T02:36:55-05:00

Hi again,

I came across these LEDS on Farnell : SFH 4252

They are 850 nm, 120 degree leds. I am not sure if the power is good enough. I have attached the datasheet. I am very confused the power output, how much is good, how many mW/Sr etc.

Also i have attached the plan for placing the LEDS. i plan to place two strips( each having 24 leds equally spaced) in the box.

Please advice.

Thanks

missing dll message running ccv 1.2

2009-08-20T13:26:31-05:00

I’ve downloaded CCV 1.2 and tried to run it I get this message telling me I’m missing this msvcp71.dll
I’m running a pc with windows xp pro sp3
Anybody with the same problem???

Rear diffuser MT table help

2010-02-08T15:20:40-05:00

Below is a picture with projector off
http://img211.imageshack.us/img211/5347/54808149.jpg

Below is the picture with projector on
http://img208.imageshack.us/img208/8580/66363017.jpg

Rear DI:

webcam with ir bandpass filter

epson projector with hot mirror.

I have put hot mirror still the projector brightness is affecting the blobs.I changed projector brightness.It worked fine.But when you open a window the brightness increases since window has white background.So the screen has some fluctuating brightness.I wonder how brightness is captured by camera.Since it can see only ir rays?

So what must be done so that changing brightness is not captured by camera?

PyMT 0.4 released

2010-02-09T07:57:32-05:00

PyMT is an open source library for developing multi-touch
applications. It is completely cross platform (Linux/OSX/Win) and
released under the terms of the GNU LGPL.

PyMT official website : http://pymt.txzone.net/
PyMT planet : http://pymt.txzone.net/planet/
API reference : http://pymt.txzone.net/docs/api/

What’s new in PyMT 0.4 ?

The complete release note is available here :
http://pymt.txzone.net/?page=releasenotes

* Move to LGPL License
* Avoid usage of Pyglet
** Backend splitting (Audio, Video, Text, Image, Camera...)
** Switch to PyOpenGL (10% more performances)
* Lot of speed improvements everywhere
* Lot of bugfix in widgets and core
* New animation framework
* New widgets (coverflow, sidepanel, video, container)
* New modules (keybinding, recordvideo, mjpegserver)
* New input processor: retain touch (reuse the last “up” touch under
certain circumstances)
* Designer App: text editor + pymt rendering (avoid slow loading)
* New Developer’s Guide on wiki
* Improved API documentation

More informations ?

Take a look at the document : “Migrate to new PyMT”
http://pymt.txzone.net/wiki/index.php/Documentation/Migrate

Thanks to all the contributors for this release :
Christopher Denter, Nathanaël Lécaudé, Thomas Hansen, Sharath Patali
and Ryan Coyner !

Mathieu

so is this a good tradeoff between the designs……

2010-02-09T02:10:43-05:00

Hi friends,
Thanks for the replies yesterday.

I really want the functionality of the side borders (space for resting arms, keeping objects), so i kind of modified the designs that i posted yesterday al little, am came up with this. (attached)

Looks good? Should i go with it?

yesterdays files: compare.jpg (first attachment)
today: sq.jpg (second attachment)

Community Core Vision 1.2 Release (tbeta)

2008-10-22T05:45:12-05:00

We are rolling out a preview of CCV for the community to start getting involved in development and give feedback on the project.

ccv.nuigroup.com

This project will help unify the community efforts into a single computer vision platform to allow for future experimentation and discovering new sensing techniques. We aim to make computer vision affordable and accessible to youth and the general public.

Please let us know all your comments, requests and ideas on the software and look forward to working with you on making it better

Before posting any questions, please read the CCV - getting started.

You can add bug reports, feature requests, or support issues to http://nuicode.com/projects/tbeta/issues/new

CCV Changelog

Windows users: use ‘ESC’ key to exit.

Big Hello from Athens, Hellas

2009-11-05T07:12:55-05:00

Hi folks.

I’m Alexander. I live in Athens, Hellas (Greece). I’ve just started my MT project.
So far, I have succesfully make my really old & cheap Crypto Compact II webcamera, act as IR camera. It works great with a little box and a glass+A4 printer paper as the MT surface. Next step is to build arrays of 20 IR Leds (x4) to put them on the botom of the MT table, for the IR lightning purpose, powered from 12V source of PC PSU.
After that I’ll proceed with the surface. I’m intend to use a piece of plexiglass and a shower curtain. Then a mirror and a small projector will show the image on surface.
My PC will do the heavy work and an ATI X1650 (spare) will be my graphics adaptor. All powered by a 600W PSU.
Finally the table will be made of wood, painted black inside (to avoid light reflections from the enviroment-is this a good idea?)

As you all find out, I’ll try to made a MT coffee-table as cheap as it can be.

I’m happy for being a member of MT community! Greetings to all!

FTIR with IR laser

2010-02-09T05:36:16-05:00

I am not sure if this has been posted or done before but instead of ir leds why not sent a line laser into the acrylic?
The laser would bounce around and also probably only one powerful laser would be necessary.
Haven’t tried this yet and i am not sure i will be able to get an ir laser so if anyone has already tried it please let me know.

Projector RS-232 control commands (ACER S1200)

2010-01-15T06:02:48-05:00

HI Guys,

I know there are some guys (maybe girls too ) on this forum made scripts for some projector so they control them automatically (turn on and turn off) trough RS-232 or network port.

I wish here to start a topic regarding this matter and share the control commands for the projectors in use by the community.

So anyone have the control commands for ACER S1200 Projector?

Have a nice Day,

Goran