Archive for the ‘art & technology’ Category

WebGL shader experiments

October 16th, 2012 admin 1 comment

I’ve been playing around with WebGL lately, just because it’s awesome, and that has resulted in what I think is quite an interesting experiment.

A while ago, my colleague Mike Pelletier at Random Studio showed me how to add an OpenGL displacement filter to a 3D mesh in OpenFrameworks.
Well, I figured that would make for a cool thing to try and replicate using WebGL.

The result? See for yourself.

And when Mike gave me a 3D scan of one of our other colleagues, a happy accident came along.

Note: best viewed in Google Chrome.

Categories: art & technology, programming Tags:

Video flowfield in Flash

September 10th, 2010 admin No comments

I ported my earlier OpenFrameworks experiments, where I moved particles based on video input, to ActionScript, and here is the result.

Click on it to change the video. If it doesn’t run well on your computer, press the – key to reduce the number of particles.

video flowfield
Click image to open

Categories: art & technology, programming Tags:

OF smoke

June 22nd, 2010 admin 3 comments

I love OpenFrameworks :D

Smoke! from Ralph Kok on Vimeo.

This is an effect done in OpenFrameworks, which is similar to my last video, but uses the webcam in a more visible way.

Categories: OpenFrameworks, art & technology Tags:

Fluid flowfield in OpenFrameworks

June 22nd, 2010 admin No comments

Fluid flowfield from Ralph Kok on Vimeo.

Lots of particles reacting to webcam input, on top of a blur. It’s so simple :)

Categories: OpenFrameworks, art & technology Tags:

Webcam flowfield in OpenFrameworks

June 18th, 2010 admin No comments

A simple flowfield with reactive particles made in OpenFrameworks.
Please excuse the poor compression.

Webcam-based flowfield from Ralph Kok on Vimeo.

These are particles responding to a webcam feed, made in OpenFrameworks. (Please excuse the compression)

Categories: OpenFrameworks, art & technology Tags:

Lightning in OpenFrameworks

June 16th, 2010 admin No comments

Yesterday, I ported my AS3 lightning renderer to OpenFrameworks with the help of Rick Companje and Joris Rotteveel.

Edit: download the source at the OpenFrameworks forum

Check out the video:

OpenFrameworks lightning renderer from Ralph Kok on Vimeo.

Iris getting somewhere

December 28th, 2009 admin No comments

My most recent iris rendering:


An iris is a beautiful thing

December 19th, 2009 admin No comments

For a while now I have wanted to render out an iris in code alone, so I have now finally started experimenting in that direction.

I must say I am not unhappy with the results sofar, especially since I have stumbled onto some nice byproducts along the way :)

iris_render_v1 iris_render_v2 iris_render_byproduct iris_research_sidestep

I love particles

December 19th, 2009 admin No comments

This little diddy was inspired by Ralph Hauert’s beautiful Bloom animation.

Try moving your mouse and clicking every once in a while :)


Categories: art & technology, programming Tags:

L-systems revisited

November 16th, 2009 admin 3 comments

I sat down again to update my ActionScript L-system renderer so that it can use multiple rules and new characters.

Next, I fiddled around a bit with axioms, rules and angles and came up with some pretty cool new curves (if I may say so myself). Check them out below.
I’ve also added the renderer application, if you run it you can play around with the curves (controls are listed at the bottom of the app). If it is too slow, please decrease the number of iterations or resize the window to be smaller.

Read more…

Categories: art & technology, l-systems, programming Tags: