Blending Art, Technology, and Light by Preston Holmes

Transcript

1. Blending Art, Technology, and Light Python for interactive and real

   time LED installations Preston Holmes! @ptone

2. Why are LEDs interesting?

3. None
4. None
5. None

6. LED LED Controller Hardware Interfaces and Protocols Software and Libraries

   Creative Effects

7. ! Light Emitting Diode

8. LED

9. None

10. • Three LEDs • put into a 5050 surface mount

    package Common RGB LED

11. Smart vs Dumb LEDs • A dumb LED is an

    RGB LED without any Integrated Circuit • 3 positive voltage inputs, and a common ground • responds just to voltage • An entire strip shares this electrical input • All LEDs on the strip are the same color

12. Smarter

13. Moar Smarter WS2811/2812

14. None

15. 5 176 50 60 0 230 20 8 100 5V

    serial protocol Array of Bytes

16. http://fastled.io But….

17. SanDevices E682 Joshua1Systems ECG-PIXAD8

18. None

19. DMX

20. E1.31 DMX over Ethernet

21. And what about the software

22. Ethernet USB Smart LED Serial DMX512 (RS485) “Software” E1.31

23. Interface Library Program! 0010101 Ethernet USB Smart LED Serial DMX512

    (RS485) “Software” E1.31

24. http://www.openlighting.org/ola/

25. https://github.com/ptone/lumos E1.31 in Python

26. None
27. None

28. Inputs Elements Outputs Keyboard, MIDI, OSC, Kinect, Event File Single,

    Groups, Chases, Effects DMX-USB, E1.31, servo control ...

29. BirdFish https://github.com/ptone/BirdFish

30. Trigger Events

31. 3 Trigger Events 1 2

32. Map Events

33. 1 2 3 4 5 6 7 8 9 10

    11 12 13 14 15 16 17 18 etc Speed of chase set by mapped events Events: Map Events Trigger Events Elements: Channels: Single Group Chase

34. Inputs • MIDI (Musical Instrument Digital Interface) • 16 channels,

    7 bit (0-127 value) • large number of physical controllers • OSC (Open Sound Control) • More modern - UDP based • Path based with very flexible values
35. None
36. None
37. None

38. Demo

39. A D S R • Attack • Decay • Sustain

    • Release Envelopes

40. Tweening

41. Position over time Saturation Hue + Intensity

42. Demo

43. Thank You

44. Questions?

45. Bonus Material: Adaptive Frame Rates

46. 1 2 3 4 5 6 7 8 9 10

    11 12 13 14 15 16 17 18 19 20 1 Second

47. Set target time based on current frame rate Render elements

    and effects into data Send Data to Output Time remaining till frame “due”: Wait Frame data “overdue” Reduce framerate

48. 1 2 3 4 5 6 7 8 9 10

    11 12 13 14 15 16 1 Second