Coding help required - create a array to store color value

Projects Programming
1

i am using 3 ws2812 led which is taken from a full strip .

So am making a game which shows 3 different colors on the 3 leds for each level and the game will have about 10 levels which means i will have to store 30 values as a pair of 3 for the 3 leds so that i can reference them in my code.

The problem am having is I do not understand how to store these values as color objects. would it be better to store the values in an array as hex code or should i store them as rgb values.

Am weak in programming so an example would be easy for me to catch.

appreciate the help thanks

2

which library are you using for your ws2812 leds?

they usually offer a type for the Colors. for example in FastLed you have choice between 2 classes:

Classes

struct CHSV
Representation of an HSV pixel (hue, saturation, value (aka brightness)). More...

struct CRGB
Representation of an RGB pixel (Red, Green, Blue) More...

so you would need a 2D array of 30 x 3 elements of one of these types, for example

#include <FastLED.h>

CRGB colors[30][3] = {
  {{ 0,  0,  0}, {10, 10, 10}, {20, 20, 20}},
  {{30, 30, 30}, {40, 40, 40}, {50, 50, 50}},
  // ...
};
3

my mistake i should have mentioned that am using the fastled library and i think the example you gave will suit my need perfectly ,

so if i need to pull in the value of 2nd row and 3rd column and set it to an led , how would my line look.

4

colors[1][2]

Remember counting starts from 0.

5

something like that

#include <FastLED.h>
#define NUM_LEDS 3
#define DATA_PIN 3

const CRGB colors[30][3] = {
  {{ 0,  0,  0}, {10, 10, 10}, {20, 20, 20}},
  {{ 1,  0,  0}, {11, 10, 10}, {21, 20, 20}},
  {{ 2,  0,  0}, {12, 10, 10}, {22, 20, 20}},
  {{ 3,  0,  0}, {13, 10, 10}, {23, 20, 20}},
  {{ 4,  0,  0}, {14, 10, 10}, {24, 20, 20}},
  {{ 5,  0,  0}, {15, 10, 10}, {25, 20, 20}},
  // ...
};

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS);  // GRB ordering is typical
  byte activeIndex = 1; // 2nd row of the array
  for (byte i = 0; i < 3; i++) {
    leds[i] = colors[activeIndex][i];
  }
  FastLED.show();
}

void loop() {}
6

thank you so much, I got what I needed

7

have fun!

8

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