» Lightstrive
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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

~13h ago

weareallclowns: has anyone used avr-gcc with vvvv? thinking about uploading a vvvv sketch to arduino

~2d ago

motzi: @udo2013: you can't change the resolution of the standard DX11 renderer (res=window size). use temptarget renderer + preview instead

~2d ago

Tamoeba Kale: Is it possible that i am missing thew whole "animation" category nodes? how?

~3d ago

udo2013: hello. is there a way to change the fullscreen resolution of renderer dx11? found no possibility + can not be opened.

~3d ago

tekcor: @joreg vl.glTF loader looks intense inside, but is red in b36.

~3d ago

MultiNIL: @joreg sure!

~3d ago

joreg: @MultiNIL supa! can we have this as a gallery entry? 24

~4d ago

MultiNIL: forgot to share: our very first vvvv project, digital-hybrid-airhockey-table: https://vimeo.com/210617286 making of: https://vimeo.com/269974764

~4d ago

dawoof: looking for a VJ/performer for the 1st of june for 1 hour in Amsterdam for a Conference, Hit me up +649241940

~4d ago

tekcor: @joreg cool seems like i missed that one. such a good shader resource