» Lightstrive
This site relies heavily on Javascript. You should enable it if you want the full experience. Learn more.

Lightstrive

Lightstrive - an interactive light projection

As part of the Catch the Light program accompanying the olympic games in Athens in August 2004 we've been invited to realize one of the 9 installations that have been setup throughout the city.

The fassade of a building is illuminated by a virtual lightsource that can be played with like a ball thus creating different lighting for the fassade every moment.

Team

  • Michael Höpfel
  • Sebastian Gregor
  • joreg

Additional credits go to Michael Mehling for last minute programming at meso, Michael Mehling and Jenny Michel for their help on setting up the hardware and to Adi and Marianna as our fabulous production team in Athens.

Further documentation on:

Movie

">tiki-download_file.php?fileId=15" />

Making Of

Lightstrive is completely realized with our inhouse developed graphical programming language vvvv and runs on two standard windows pcs with current graphics hardware.

The audience is being tracked by a low latency firewire camera mounted high above on the opposite building viewing the whole interactive zone of about 22m. Direction and power of the users movement is extracted by analysing the video over time. A resulting vector is used to update the lights/balls movement that is otherwise being calculated by a physics engine that also includes the facades geometry in its calculations. Therefore the light/ball can also be caught in one of fhe balconies in which case the game restarts.

The lights/balls current coordinate is always sent to the second pc where it is used to calculate the correct shadows cast by the point-lightsource represented by the ball. Shadows are calculated via custom vertex- and pixelshaders.

  • the place, korai, the bank building by day
  • photos of setup

Early Screenshots

the tracker system

the shadowing system

anonymous user login

Shoutbox

~8h ago

metrowave: the livestream is great...big thx!

~9h ago

Damien Rave: new small project from today: piano + midi + vvvv = love https://www.youtube.com/watch?v=KS5MZ5_KRb8

~10h ago

herbst: @tonfilm no stream here. I guess you know that and are frantically working on a solution? ;)

~10h ago

tonfilm: the #livestream URL is on: vvvv-keynode-livestream

~14h ago

marlonossiliere: Does anyone have any idea how to do this project in vvvv ?? https://www.youtube.com/watch?v=j9JXtTj0mzE

~17h ago

tonfilm: Happening #today, #vvvv #community #keynote #vl #visualprogramming #livestream vvvv-keynode-livestream

~21h ago

joreg: @sagishi, yes, working on it..

~1d ago

sagishi: Will there be a keynode live stream again this year?

~2d ago

mrboni: Any studios using v4 in Canada? (esp Quebec) Considering spending more time out here but don't want to learn touch designer ;)

~2d ago

catweasel: Setup is no longer changing the association of vvvv versions, I have to edit the reg manually, even if run as admin