Physics engines & openFrameworks

Working on a demo using openCV to detect motion in openFrameworks. When motion is detected I apply a force on a couple of "posters". Users are able to wave around and make the posters spin. I've done some tests with ofxMSAPhysics, ofxRuiPhysics2d and ofxBox2d. All engines are easily integrated in a oF project, though Box2d gave me the best natural result. ofxMSAPhysics and ofxRuiPhysics2d are also great btw!

Rigid bodies

Demo (I only use T-Mobile as an example; I'm not (yet) hired by T-Mobile

17 June 2009

OpenGL

I spent some time playing around with OpenGL. Some notes to myself:

gluLookAt(camX, camY, camZ, eyeX, eyeY, eyeZ, upX, upY, upZ)

camX/Y/Z: Position of the camera
eyeX/Y/Z: Camera looks at this position
upX/Y/Z: The up vector, mostly use: 0,1,0 (what's the top of the camera

6 June 2009

Brullenbakken on place

Today we've "installed" our brullenbakken project at location.

4 June 2009

Brullenbakken

Working on some interactive garbage cans. Using light we create a time based game.

26 May 2009

Grass animation

My first vimeo movie :>. (not really happy with the quality though)

Experimenting with Grass animation from roxlu on Vimeo.

22 May 2009

Perlin noise

I finally took my chance to do some tests with perlin noise and I'm happy I did. Perlin noise gives you a natural random number that I use to create some smooth and natural motion. Below you see some screenshots from the application I've created to do some tests with perlin noise an natural motion.

20 May 2009

Choosing a transistor

Just a note to myself: 1. The transistor's maximum collector current Ic(max) must be greater than the load current Lc

load current (Lc) = supply voltage Vss / load resistance Lr

Example: load resistance (Lr) = 100 Ohm supply voltage (Vss) = 5V load current (Lc) = 5V / 100 Ohm = 50mA

1. The transistors minimum current gain hFE(min) must be at least five times the load current (Lc) divided by the maximum output current from the IC.

hFE(min) > 5 x load current (Lc) / max. IC current

1. Choose a transistor which meets these requirements and make note of its properties Ic(max) and hFE(min).

2. Calculate an approximate value for the base resistor

Rb = (Vss x hFE) / 5 x ICcurrent

17 May 2009

Rol Je Rot Rolstoel Race goes to Paramaribo!!

I'm really pleased to announce that roljerot goes to Paramaribo in a couple of weeks. In a couple of weeks I'll post some more information on this.

14 May 2009

Rol Je Rot Rolstoel Race & 3D

Currently I'm doing some tests with a great 3D engine called Ogre3D and the Bullet physics engine Rol Je for Rot Rolstoel Race and other interactive installation we're working on. Below you see an image of my first test with Bullet and Ogre

While googling on Bullet I found these sites which seems interesting:

• http://www.rchoetzlein.com/art/index.htm

Video of an algoritm found on above site

water simulation from arturo on Vimeo.

11 May 2009

Springs

It was a very busy week but finally got some time to continue my expirments with openframeworks and programming motion.

9 May 2009