Assigning array variables to int variables

Question

I need to control thousands of rgb leds.To make animations I want to assign led numbers(addressable led strip) to arrays.For example floor[2]room[14]=106 106 is the number of led,there are many floors and rooms.I want to change floor or room numbers with that way I will make animations. We can say its 92x30 pixel monitor.I tried to create list of floor and rooms but I couldnt make it. I'm new to programming,help please!

Solved with this way #define LEDNO(FLOOR, ROOM) ((ROOM) + (FLOOR * 92))

Answer 1

You really don't need to maintain a list.

Just calculate the LED index from the location:

int room = 14;
int floor = 2;

const int rooms = 92;

int led = room + (floor * rooms);

That is, each floor below the current one (floors and rooms count from 0) is a full row of rooms (92 * floors), and there are "room" extra rooms on this floor to add to it.

You could make a macro:

#define LEDNO(FLOOR, ROOM) ((ROOM) + (FLOOR * 92))

Then your LED number is just:

int led = LEDNO(2, 14);

Here's an example taken from your code:

void floorsup(){

  FastLED.setBrightness(brightness);

  for(int a=1;a<255;a+=40){
    for (int floor = 0; floor < 30; floor++) {
      for (int room = 0; room < 92; room++) {
        leds[LEDNO(floor, room)].setHSV(a, 255, 255);
      }
      FastLED.show();
      delay(300);
    }
    for (int floor = 0; floor < 30; floor++) {
      for (int room = 0; room < 92; room++) {
        leds2[LEDNO(floor, room)].setHSV(a, 255, 255);
      }
      FastLED.show();
      delay(300);
    }
    for (int floor = 0; floor < 30; floor++) {
      for (int room = 0; room < 92; room++) {
        leds3[LEDNO(floor, room)].setHSV(a, 255, 255);
      }
      FastLED.show();
      delay(300);
    }
  }
}

Answer 2

Something like this would work:

#define MAX_FLOORS  92
#define MAX_ROOMS   30

struct floor_str {
  int Room[MAX_ROOMS];
} Floor[MAX_FLOORS];

You would then access an individual LED address like:

Floor[2].Room[14] = 106;