Instead of fill_rainbow treating my project with how the LEDs are wired how can

Brian_Lewis · August 13, 2018, 3:44am

Instead of fill_rainbow treating my project with how the LEDs are wired how can I get it to use one of the many maps that I’ve created?

Chris_Parton · August 13, 2018, 10:44am

I don’t think FastLED supports this, bit if you look at the fill_rainbow implementation at FastLED/colorutils.cpp at dbd2d8b8ca037f9d2d5e743785abac28b125c947 · FastLED/FastLED · GitHub, you’ll see it’s quite a simple thing to implement.

I’d take a copy of that function and paste it in your code with a different name, and replace the i in pFirstLed[i] with the index you want.

Good luck!

github.com

FastLED/FastLED/blob/dbd2d8b8ca037f9d2d5e743785abac28b125c947/colorutils.cpp

#define FASTLED_INTERNAL
#define __PROG_TYPES_COMPAT__

#include <stdint.h>
#include <math.h>

#include "FastLED.h"

FASTLED_NAMESPACE_BEGIN



void fill_solid( struct CRGB * leds, int numToFill,
                 const struct CRGB& color)
{
    for( int i = 0; i < numToFill; i++) {
        leds[i] = color;
    }
}

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Brian_Lewis · August 14, 2018, 2:19am

@Chris_Parton Thanks Chris. Your suggestion worked great.

Chris_Parton · August 14, 2018, 3:00am

No problem at all! You should share some photos or video of your project at some point

Brian_Lewis · August 14, 2018, 3:13am

@Chris_Parton I’ll try to get some decent photos and video taken. I’m using a thin sheet of white acrylic as a diffuser, which so far has made everything look blurry in photos.