RGB value test

You can test and see if a pixel is black (off) like this:

if ( leds[i] ) {
  // it has a R,G, and/or B value and is not black
} else {
  // it is black (off)
}


You can also do something like this:

// fade leds above RGB brightness 32
for (uint8_t i = 0; i < NUM_LEDS; i++) {
  if ( leds[i].r > 32 ) { leds[i].r--; }
  if ( leds[i].g > 32 ) { leds[i].g--; }
  if ( leds[i].b > 32 ) { leds[i].b--; }
}