Archive for the 'news' Category

virtual graffiti update

Published by matthew venn on December 15, 2009 in news. 1 Comment

I’ve got a demo in 2 days, so everything needs to be ready! Lou and I built the screen today, which packs up small enough for my bike.
screen

Now I need to put the spray can electronics in a handheld box and make the system more responsive to brush distance and nozzle pressure. At the moment it feels laggy and unreliable.

virtual graffiti update

Published by matthew venn on December 10, 2009 in news. 0 Comments

The system is going to be tested at a youth club a week today! The spray can is now wireless (see pic), and the software has been upgraded to include dripping and colour choice. A new video is here.
virtual graffiti spray can

virtual graffiti

Published by matthew venn on November 23, 2009 in news and projects. 0 Comments

A follow up to my latest post on using processing + linux for virtual graffiti, here is a video of it in action! The code is here: wiimote_sensor_calibration.tar.

linux ubuntu 8.10 + processing + wiimote + wrj4P5 = virtual graffiti!

Published by matthew venn on November 20, 2009 in howto, news and projects. 2 Comments

Inspired by the various wiimote graffiti offerings, but finding no source or instructions (did I not look hard enough?) I decided to do it myself. Here is the first step: getting processing working with the wiimote infrared camera to detect an infrared LED.

After installing processing, I found some instructions on the forum, but I still had some problems. Here is what I had to do:

  1. install processing
  2. install bluez libraries: sudo apt-get install bluez-utils libbluetooth-dev
  3. create ./processing/libraries/Loc and ./processing/libraries/wrj4P5
  4. download bluecove-2.1.0.jar and bluecove-gpl-2.1.0.jar and put into ./processing/libraries/wrj4P5/library/
  5. download wiiremoteJ v1.6, and put the .jar into ./processing/libraries/wrj4P5/library/
  6. download wrj4P5.jar (I used alpha-11) and put into ./processing/libraries/wrj4P5/library/
  7. download wrj4P5.zip and unzip into ./processing/libraries/wrj4P5/lll/
  8. download Loc.jar (I used beta-5) and put into ./processing/libraries/Loc/library/
  9. download Loc.zip and unzip into ./processing/libraries/Loc/lll/

Then I used code inspired from Classiclll to get the buttons and sensor bar working. This code just draws a circle where the 1st infra red source is found by the wiimote:

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import lll.wrj4P5.*;
import lll.Loc.*;
Wrj4P5 wii;

void setup() {
size(300,300,P2D);
wii=new Wrj4P5(this);
wii.connect();
}

void draw() {
background( 0 );
fill( 255 );

Loc p=wii.rimokon.irLights[0];
if (p.x>-1) {
ellipse( (1 - p.x)*width, (1.-p.y)*height, 10, 10);
}

}

Thanks to the bluecove team, the bluez team, processing crew, Classiclll and all open source massive!

my electric upright bass for sale

Published by matthew venn on November 16, 2009 in news. 0 Comments

I’m saying goodbye to my lovely fold up electric upright bass. I just don’t use it enough to justify owning it!

I’m selling it on ebay, or you can contact me at matt with enquiries.

Information about the maker and reviews of the bass can be found at the bespoke basses website.