I have recently created a custom effect that I am calling glimmer, it is essentially an inverse of the twinkle effect (lights start on and randomly some slightly dim before coming back again):
effects:
- addressable_lambda:
name: Glimmer
update_interval: 16ms
lambda: |-
const float glimmer_probability = 0.10f;
const uint32_t progress_interval = 4;
static uint32_t progress = 0;
const uint32_t now = millis();
uint8_t pos_add = 0;
if (now - progress > 4) {
const uint32_t pos_add32 = (now - progress) / 4;
pos_add = pos_add32;
progress += pos_add32 * 4;
}
for (auto view : it) {
if (view.get_effect_data() != 0) {
const uint8_t sine = half_sin8(view.get_effect_data());
view = current_color * -sine;
const uint8_t new_pos = view.get_effect_data() + pos_add;
if (new_pos < view.get_effect_data())
view.set_effect_data(0);
else
view.set_effect_data(new_pos);
} else {
view = current_color;
}
}
while (random_float() < 0.10) {
const size_t pos = random_uint32() % it.size();
if (it[pos].get_effect_data() == 0)
it[pos].set_effect_data(1);
}
it.schedule_show();
if (initial_run) {
progress = 0;
it.all() = current_color;
}
You can adjust the effect by editing the constants at the top of the file, glimmer_probability is a value between 0 and 1 representing how likely it is that a light will glimmer.
NB. This effect requires a set of addressable lights but it will automatically use the correct length.
Feel free to give it a go and maybe improve it, if you have any enhancements, I would love to read about them!
Merry Christmas!