noob question: I want to use some RGB color palettes I found that are

Stephen_Kramer · October 1, 2017, 10:49pm

noob question:

I want to use some RGB color palettes I found that are 5 colors each with the Noise+Palettes example. How do I add these palettes to the sketch?

marmil · October 1, 2017, 11:16pm

In the example you mention, if you wanted the purple and green palette for example you could copy lines 238-249 to your new sketch.

github.com

FastLED/FastLED/blob/master/examples/NoisePlusPalette/NoisePlusPalette.ino#L238-L249


void SetupPurpleAndGreenPalette()
{
  CRGB purple = CHSV( HUE_PURPLE, 255, 255);
  CRGB green  = CHSV( HUE_GREEN, 255, 255);
  CRGB black  = CRGB::Black;
  
  currentPalette = CRGBPalette16( 
    green,  green,  black,  black,
    purple, purple, black,  black,
    green,  green,  black,  black,
    purple, purple, black,  black );
}

All the palettes mentioned on lines 174 -175 are included with FastLED, meaning they have already been created in the library code, so you can just use any of those names (LavaColors_p, PartyColors_p, etc) when ever you’d like.

Stephen_Kramer · October 2, 2017, 1:28am

I want to make my own palette colors from RGB values, how do you do that?

marmil · October 2, 2017, 2:04am

Instead of using CRGB::Red for example, you could use CRGB(255,0,0) for red, or adjust to any RGB value you’d like.
If you want to make your own custom named color:
CRGB colorA = CRGB(32,128,255);
CRGB colorB = CRGB(0,42,84);

Then you can use that name when making a palette.

Also see this wiki page for another color palette option:

Stephen_Kramer · October 2, 2017, 3:00am

Thanks. Now I have many custom palettes defined, palette0, palette1, etc… can I somehow put the palette names in an array like palettes[palette0, palette1, … ] so I can assign them using something like: targetPalette = CRGBPalette16( palettes [ i ] ) so I can increment i to change the target palette?

marmil · October 2, 2017, 4:08am

There might be a way, but I haven’t done that before. Try some stuff out and share what you discover.

Ken_White · October 2, 2017, 11:57am

@Stephen_Kramer - See lines 47, 48, 61 and 617 of the ColorWavesWithPalettes sketch by @Mark_Kriegsman at:

gist.github.com

https://gist.github.com/kriegsman/8281905786e8b2632aeb

ColorWavesWithPalettes.ino

#include "FastLED.h"

// ColorWavesWithPalettes
// Animated shifting color waves, with several cross-fading color palettes.
// by Mark Kriegsman, August 2015
//
// Color palettes courtesy of cpt-city and its contributors:
//   http://soliton.vm.bytemark.co.uk/pub/cpt-city/
//
// Color palettes converted for FastLED using "PaletteKnife" v1:

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It shows you how to make and use an array of palettes in a sketch.

Stephen_Kramer · October 2, 2017, 9:26pm

@marmil I get a compiling error for command: CRGB SFTA0 = CRGB(88,140,115); inoise8_pal_demo_fastLed:65: error: ‘SFTA0’ is not a member of ‘CRGB’

 CRGB::SFTA0,

 ^

Stephen_Kramer · October 2, 2017, 9:29pm

@Ken_White This is for gradient palettes, I noticed the use of TProgmemRGBGradientPalettePtr. Is there a similar definition for TProgmemPalette16Ptr ?

marmil · October 2, 2017, 9:51pm

A gradient palette has a slightly different format (then a color palette) because it has the anchor point numbers and can have a variable number of colors.

Here’s two more post for you to check out that might be of interest.
https://plus.google.com/115124694226931502095/posts/EQ27nicU5Fq

https://plus.google.com/102054795236178256184/posts/UWbQBcmKDdU

Stephen_Kramer · October 2, 2017, 10:39pm

Marc do you know why my CRGB color definition is not working? Did I make a mistake?

marmil · October 2, 2017, 10:44pm

We might be completely guessing in the dark without seeing your code. Please put it on http://gist.github.com and share the link.

Stephen_Kramer · October 2, 2017, 10:48pm

Basically I saw this: https://www.youtube.com/watch?v=fjoDkqoU5Fk
and I really like it and want to use it with my own palettes, and be able to choose the palette arbitrarily from a list during the sketch. I was using TProgmemPalette16 palettes that I defined as used in the inoise8_pal_demo.ino sketch. Can I somehow convert my TProgmemPalette16 palettes to gradient palettes so I can use the “array of palettes” functionality?

marmil · October 2, 2017, 11:13pm

Yes. If you already have a custom CRGBPalette16 you like, copy those values into a gradient color palette. You could simplify it some or put all 16 entries in the gradient color palette.

Ken_White · October 3, 2017, 6:57pm

@Stephen_Kramer - TwinkleFOX by @Mark_Kriegsman uses TProgmemRGBPalette16* and TProgmemRGBPalette16 palettes. I think this is what you are looking for. It can be found at:

gist.github.com

https://gist.github.com/kriegsman/756ea6dcae8e30845b5a

TwinkleFOX.ino

#include "FastLED.h"

#if defined(FASTLED_VERSION) && (FASTLED_VERSION < 3001000)
#warning "Requires FastLED 3.1 or later; check github for latest code."
#endif


#define NUM_LEDS      100
#define LED_TYPE   WS2811
#define COLOR_ORDER   GRB

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See line 359 to see how to set it up.

Stephen_Kramer · October 11, 2017, 9:46pm

Hey guys thanks for the help sorry for the delay lot of projects going on but I would still really like ot get this to work. I posted my code here https://gist.github.com/perigalacticon/9b49b3b18b358a28fc597d38d0366f5a I am getting errors about declaring the custom CRGB colors could you help me?

marmil · October 12, 2017, 5:29am

When you make a custom color such as your:
CRGB SFTA0 = CRGB(88,140,115);
and then use in your palette it would only be SFTA0 (not CRGB::SFTA0).

Look at the ColorPalette.ino, line 128 and 134 with “purple” for example.

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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Stephen_Kramer · October 12, 2017, 6:08am

Hi thanks again got rid of all of the related errors except for one. I’m not sure how to declare everything here, I’m getting a strange error: “inoise8_pal_demo_fastLed:163: error: cannot convert ‘const uint32_t* {aka const long unsigned int*}’ to ‘const uint32_t ()[16] {aka const long unsigned int ()[16]}’ in initialization”. I updated the code on the Gist page if you want to try it.

marmil · October 12, 2017, 7:01am

Look at the TwinkleFOX example again, line 362 for example. You are missing the “&” in your code on lines 140-142.

Stephen_Kramer · October 16, 2017, 2:27am

Ok got it. I am running Twinklefox (TW) now to test the custom colors. I have HSV colors now, and I convert them with hsv2rgb_rainbow to a RGB color. Then I put the colors into the array for TW. But even if I put all of the same color into the array it is displaying random colors. If I just do a straight fill with the color is is correct though. Any ideas?