Wacom Light Graffiti


[Jon] wanted to have some fun with the Graffiti Research Lab’s LASER Tag. Unfortunately his computer wasn’t quite up for the challenge of detecting the laser pointer with a webcam. Not to be discouraged by this hardware limitation, he purchased a used Wacom tablet and threw together some code to make it work with the GRL display software. Now designs can be scrawled on the pad and the projector displays them with the familiar dripping paint effect.

17 thoughts on “Wacom Light Graffiti

  1. Hey there! Just to avoid some confusion — I’m not actually using the GRL software at all in this project. I believe GRL’s program uses Quicktime, which crawled on my machine.

    My software (which is a really small program) simply reads input from the Wacom via a serial port, and uses libSDL to draw on the screen. The dripping effect is done by randomly selecting some points in the user’s stylus stroke to “drip.” The “drips” are kept track of and are updated (i.e. redrawn a few pixels down) after some amount of time.

  2. @Jon, great project man really cool hack. And don’t worry about the mix up this isn’t a real news site, the don’t worry about things like facts and checking sources here.

  3. @Jack: Because it used to be a place I loved to visit should I just go quietly into the night and let these bastards rape something I used to love?

    I give credit where it is due and leave as many positive comments as I do negative, its just the negative ones tend to stand out a bit more.

    Thanks for your concern.

  4. Thats some great stuff. I was wondering how to do that myself after seeing the vid of those guys on youtube doing it with the laser pointer in DC. This looks alot better as i have a couple of tablets that i can mess with.

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