FastLED 3.10.2

• CORKSCREW MAPPING!
  • Want to create a light saber or festival stick? Before your options were to have vertical strips.
  • Now you can use a corkscrew mapping fl/corkscrew.h, see examples/FestivalStick
    • You input the number of LEDS + number of turns.
    • Corkscrew will provide a surface XY grid that you draw too.
      • then call Corkscrew::draw(), and the current surface will be mapped to the corkscrew.
      • Rendering is done via 2x2 bilinear sampling. Looks great!
• Animartrix - 30% faster due to forced -O3 and fastmath compiler settings for this one file.
• Ease Functions - lots and lots of ease functions! Great for animations!
  • see fl/ease.h and the demo examples/Ease/Ease.ino
  • Fast! Everything is done in integer space.
• 3D Perlin noise (inoise8(x, y, z)) range utilization improved from 72.9% to 88.6%
  • Significantly better quality for volumetric LED effects (3D fire, clouds, particles)
  • Uses industry-standard 12 edge vectors of a cube for optimal gradient coverage
• Adafruit NeoPixel Bridge: Optional Adafruit_NeoPixel clockless controller support
  • For some platforms Adafruits NeoPixel just works better.
  • Enable with #define FASTLED_USE_ADAFRUIT_NEOPIXEL before including FastLED
  • Now your WS2812 chipset will use the AdafruitNeopixel library (if installed)
• New LED chipset: SM16824E
  • 3-Wire
  • See also: #1941 (comment)
• apollo3_red (stm variant): beta support.
• HSV16 support
  • CRGB -> HSV -> CRGB is highly lossy
  • CRGB -> HSV16 -> CRGB is almost perfect.
  • Integer based so it's fast.
• ColorBoost
  • CRGB::colorBoost()
  • Are you doing video on WS2812? Well then you probably are using gamma correction
  • Color Boost is an alternative for gamma correction for the WS2812 and other RGB8 chipsets.
    • It preserves luminosity but allows you to increase saturation.
    • HSV16 is used to preserve color resolution.
• HSV -> CRGB default conversion function can now be overriden.
  • Thanks to https://github.com/ssilverman or this full spectrum HSV implementation.
• If you just want to change it for your sketch you can use this:
  • #define FASTLED_HSV_CONVERSION_RAINBOW (default)
  • #define FASTLED_HSV_CONVERSION_SPECTRUM
  • #define FASTLED_HSV_CONVERSION_FULL_SPECTRUM
  • To change for the entire engine (recommended) then set these as build flags:
    • -DFASTLED_HSV_CONVERSION_RAINBOW
    • -DFASTLED_HSV_CONVERSION_SPECTRUM
    • -FASTLED_HSV_CONVERSION_FULL_SPECTRUM
• fl/fetch.h
  • A non blocking http fetch library returning an fl/promise.h
  • You can then await the promise with fl::await or install a callback to be invoked. The latter is recommended.
• fl/json.h rewrite
  • Much more ergonic library. Fast parsing for packed arrays of number
  • The underlying ArduinoJson library is only ergonomic if you allow std:string and std::sstream, which is missing on platforms like avr. So we had to write our own api to handle this.
• Platforms
  • ESP32-C5 is now supported.
  • ESP32 WS2812 SPI driver has a fix for it's async draw routine.
  • Blend2d will now replace a subfx XYMap (when necessary) to prevent double mapping. A warning will be issued.
  • Seeed XIAO nRF52840 Sense: Fixed incorrect pin mappings that were copied from Adafruit Feather board
  • APA102HD Gamma Correction Algorithm: Completely rewritten with closed-form mathematical solution
    • Thanks https://github.com/gwgill!
    • Graph of the old algorithms quantization issues can be see here:
      • https://www.argyllcms.com/APA102_loglog.svg
  • STM32F1 pin mapping fixes (blue pill)
    • #1973
    • Thanks https://github.com/vishwamartur!
• Internal stuff
  • FastLED is now way more strict in it's compiler settings. Warnings are treated as errors
    • Lots of fixes, some code required amnesty.
  • The examples now compile under clang and run for ./test
  • All examples now compile for ALL platforms.
    • this was a major undertaking.
    • required a rewrite of the testing infrastructure.
    • Teensy41 took ~ 1 hours to compile 40 examples, now it can do 80 examples in ~8 mins

Color Boost Demo