Function countLitLeds

tests/fl/fx/1d/perlin_particle_punch.cpp:14–21

Helper: count non-black LEDs in the buffer

// Helper: count non-black LEDs in the buffer
static int countLitLeds(const CRGB *leds, u16 count) {
    int lit = 0;
    for (u16 i = 0; i < count; ++i) {
        if (leds[i].r > 0 || leds[i].g > 0 || leds[i].b > 0)
            lit++;
    }
    return lit;
}

// Helper: check if any LEDs in a range are lit
static bool anyLitInRange(const CRGB *leds, int start, int end, u16 count) {