hello, I am looking for some help,

K_B11 · August 6, 2018, 2:19pm

hello, I am looking for some help, I have a program where I have lots of effects from palettes, but the palettes are only a max of 4 colors, or a pre-defined gradient. I want to make a palette, my issue is i want to know how to fill it solid with no changing of colors, as well as fill it solid but so it cycles through the colors in my palette. I want to have 5-6 colors in my palettes. I have attached the program i am trying to edit

Ken_White · August 6, 2018, 3:58pm

@K_B11 - Look at @Mark_Kriegsman 's following sketches:

github.com

FastLED/FastLED/blob/master/examples/ColorPalette/ColorPalette.ino

/// @file    ColorPalette.ino
/// @brief   Demonstrates how to use @ref ColorPalettes
/// @example ColorPalette.ino

#include <FastLED.h>

#define LED_PIN     5
#define NUM_LEDS    50
#define BRIGHTNESS  64
#define LED_TYPE    WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

#define UPDATES_PER_SECOND 100

// This example shows several ways to set up and use 'palettes' of colors
// with FastLED.
//
// These compact palettes provide an easy way to re-colorize your
// animation on the fly, quickly, easily, and with low overhead.

This file has been truncated. show original

gist.github.com

https://gist.github.com/kriegsman/1f7ccbbfa492a73c015e

PaletteCrossfade.ino

#include <FastLED.h>

#define LED_PIN     3
#define NUM_LEDS    30
#define BRIGHTNESS  96
#define LED_TYPE    WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

#define UPDATES_PER_SECOND 100

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It is a great way to learn about palettes.

FYI, a palette created with CRGBPalette16 can have 16 different colors in it.

To have a palette of a single color, I have used the following to set the palette to red:

CRGBPalette16 currentPalette( CRGB::Red); // this is located before the Setup.

Later in your sketch you can change palettes by using:

currentPalette = CRGBPalette16(CRGB::Purple);

As to your 5-6 colors question, I would recommend that you try making different color combinations in a palette or in a gradient palette. Next, try out these new palettes in simple test sketch and see what happens, i.e. experiment with different palettes that you create to get the results that you want. I have used Mark’s aforementioned sketches to test my new palettes.

Also for your 5-6 colors question, you might want to look at the palette knife tool. See at the following webpage to learn more about the palette knife tool:

Finally, @Erin_St_Blaine has a great primer on how to use the palette knife tool at:

and at:

K_B11 · August 6, 2018, 6:44pm

Can I make the palette, instead of using the palette knife? I want to define my own palette, I do not want it to be a gradient, and i want it set to NOBLEND

Ken_White · August 6, 2018, 7:25pm

@K_B11 - Yes, you can make palettes without using the palette knife tool. Look at lines 1023 to 1109 in your own sketch. That is making your own palettes without the palette knife tool. Also, look at lines 101 to 188 in Mark’s sketch:

github.com

FastLED/FastLED/blob/master/examples/ColorPalette/ColorPalette.ino

#include <FastLED.h>

#define LED_PIN     5
#define NUM_LEDS    50
#define BRIGHTNESS  64
#define LED_TYPE    WS2811
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];

#define UPDATES_PER_SECOND 100

// This example shows several ways to set up and use 'palettes' of colors
// with FastLED.
//
// These compact palettes provide an easy way to re-colorize your
// animation on the fly, quickly, easily, and with low overhead.
//
// USING palettes is MUCH simpler in practice than in theory, so first just
// run this sketch, and watch the pretty lights as you then read through
// the code.  Although this sketch has eight (or more) different color schemes,

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This is where he makes palettes without the palette knife tool and he explains the FastLED palette. In Mark’s other sketch, look at lines 85 to 94 where palettes are made or defined.

Finally, you can look at lines 338 to 392 in:

https://github.com/FastLED/FastLED/blob/master/colorutils.h

for an explanation on how to create palettes.