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?
6. LED LED Controller Hardware Interfaces and Protocols Software and Libraries Creative Effects
7. ! Light Emitting Diode
8. LED
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
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
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
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
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