EDIT: Actually those functions help me do the animation for sure but does not

Francois_Oudot · March 30, 2017, 6:21am

EDIT:

Actually those functions help me do the animation for sure but does not help me in the issue that I tried to explain - but thanks for your feedback!

To clarify what I need: I need to know the current color of each LED in my strip without handling/managing a huge array.

Does that make sense?
Any suggestions?
Thanks!

I went through colorutils but can’t find the function I am looking to do and would like your advice on the best way to implement it.

I use a “base” color for all my LEDs HSV=168,170,30.
Randomly some LEDs change color but after I want those LEDs that changed color to fade back to the “base” color at a speed dependant on the gap between the colors- ex if the led that changed color are at HSV=160,70,70 - I want it to do a first loop at HSV=164,120,50 and on until going to the base color HSV=168,170,30.

It is sort of a fade to black but to a specific color and with a fading % dependant on the gap between the HSV values…

Does that make sense?

Thanks for your feedback - currently I am building all this from scratch but by using existing functions there might be an easier path that I don’t see currently!

Will_Tatam · March 30, 2017, 7:40am

Sounds like it would be pretty. I wrote something similar where I created a base colour of blue, with flashes of white that fade back to blue for starcloth style effect. I will try and have a look later to see if it could be adapted easily for your effect

Charles_Schmitt_Deta · March 30, 2017, 1:24pm

Keep BLEND ing new color back to base color, there are several types of blend, try them all

Andrew_Tuline · March 30, 2017, 2:18pm

// Blend
leds[i] = blend(CRGB::Red, CRGB::Blue, sin8(10,0,255));

You can also do gradients along a strand, such as:

//FORWARD_HUES, BACKWARD_HUES, SHORTEST_HUES, LONGEST_HUES
fill_gradient(leds, startpos, CHSV(50, 255,255) , endpos, CHSV(150,255,255), SHORTEST_HUES);
fill_gradient(leds, NUM_LEDS, CHSV(50, 255,255), CHSV(100,255,255), LONGEST_HUES);

marmil · March 30, 2017, 4:35pm

@Francois_Oudot Not exactly what you’re looking for, but here’s another example just to give you more ideas.

github.com

marmilicious/FastLED_examples/blob/master/blend_to_target_color.ino

//***************************************************************
// Example of blending from one color to a target color.
// Once the target color is reached a new random target color
// is picked to blend toward.
//
// leds[0] always displays the target color.
//
// Marc Miller, Feb 2017
//***************************************************************

#include "FastLED.h"
#define DATA_PIN    11
#define CLK_PIN     13
#define LED_TYPE    LPD8806
#define COLOR_ORDER GRB
#define NUM_LEDS    32
#define BRIGHTNESS  100
CRGB leds[NUM_LEDS];

uint8_t blendRate = 50;  // How fast to blend.  Higher is slower.  [milliseconds]

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Francois_Oudot · March 30, 2017, 8:09pm

Thanks all for your great and fast feedback! Will take a look and post the result here