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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

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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

~18h ago

joreg: if you haven't yet: we're still accepting entries to our 2019 survvvvey https://goo.gl/forms/g3t6gwSwUfZwMOyd2 #vvvv

~20h ago

joreg: @polyrhythm these look great. do you know you can share a screenshot by simply pressing ctrl+3 on a renderer?!

~22h ago

polyrhythm: @AKa-visuals yep your comment helped me prioritize them :)

~1d ago

AKa-visuals: @polyrhythm ohhhh you heard my wishes.. supercool

~1d ago

polyrhythm: IBL support WIP for raytracer: https://i.imgur.com/qnngDIU.jpg

~6d ago

domj: Little vvvv robotics and light control in the Tschechisches Zentrum Berlin in few hours, just patching en route https://bit.ly/2V0FAb3 ;)

~6d ago

AKa-visuals: @polyrhythm Stunning!.. cant wait for ibl integration. Keep on!

~6d ago

catweasel: @polyrhythm looks lovely!

~6d ago

polyrhythm: i put a little love into my vvvv raytracer after some time not touching it. textured emissive lights! https://i.imgur.com/OVzp6d5.png

~6d ago

sinus: Yes, they did the kollabo with klf. Still a tornado in the club.