258 lines
6.0 KiB
Rust
258 lines
6.0 KiB
Rust
// vim: noet
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use std::fmt;
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use std::error::Error as StdError;
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use std::rc::Rc;
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use std::cell::RefCell;
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use crate::config;
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use crate::signal_processing::SignalProcessing;
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type Result<T> = std::result::Result<T, AnimationError>;
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/////////// Error Type and Implementation ////////////
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#[derive(Debug)]
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pub enum AnimationError
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{
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LuaError(mlua::Error),
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ErrorMessage(std::string::String),
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}
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impl fmt::Display for AnimationError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match self {
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AnimationError::LuaError(e) => f.write_fmt(format_args!("=== Lua Error ===\n{}\n=================", e))?,
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AnimationError::ErrorMessage(s) => f.write_fmt(format_args!("Message({})", s))?,
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};
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Ok(())
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}
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}
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impl StdError for AnimationError {
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fn description(&self) -> &str {
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match *self {
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AnimationError::LuaError(_) => "Lua Error",
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AnimationError::ErrorMessage(_) => "Error Message",
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}
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}
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}
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/////////// Helper Structs ////////////
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#[derive(Copy, Clone)]
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pub struct Color
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{
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pub r: f32,
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pub g: f32,
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pub b: f32,
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pub w: f32
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}
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impl Color
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{
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pub fn scale(&mut self, factor: f32)
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{
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self.r *= factor;
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self.g *= factor;
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self.b *= factor;
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self.w *= factor;
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}
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fn _limit_component(c: &mut f32)
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{
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if *c > 1.0 {
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*c = 1.0;
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} else if *c < 0.0 {
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*c = 0.0;
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}
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}
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pub fn limit(&mut self)
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{
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Color::_limit_component(&mut self.r);
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Color::_limit_component(&mut self.g);
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Color::_limit_component(&mut self.b);
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Color::_limit_component(&mut self.w);
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}
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pub fn ref_by_index_mut(&mut self, i: usize) -> Option<&mut f32>
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{
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match i {
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0 => Some(&mut self.r),
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1 => Some(&mut self.g),
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2 => Some(&mut self.b),
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3 => Some(&mut self.w),
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_ => None
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}
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}
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pub fn ref_by_index(&self, i: usize) -> Option<&f32>
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{
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match i {
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0 => Some(&self.r),
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1 => Some(&self.g),
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2 => Some(&self.b),
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3 => Some(&self.w),
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_ => None
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}
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}
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}
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/////////// Animation Trait ////////////
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pub trait Animation {
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fn new(sigproc: Rc<RefCell<SignalProcessing>>) -> Self;
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fn init(&mut self) -> Result<()>;
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fn periodic(&mut self) -> Result<()>;
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fn get_colorlist(&self) -> &[ [Color; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS];
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}
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/////////// Animation implementations ////////////
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pub mod particles
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{
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use crate::animation::{Color, Animation, Result};
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use crate::signal_processing::SignalProcessing;
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use crate::config;
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use std::rc::Rc;
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use std::cell::RefCell;
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use rand::Rng;
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const COOLDOWN_FACTOR : f32 = 0.99995;
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const RGB_EXPONENT : f32 = 1.8;
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const W_EXPONENT : f32 = 2.2;
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const FADE_FACTOR : f32 = 0.98;
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const AVG_LEDS_ACTIVATED : f32 = 0.05;
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const WHITE_EXTRA_SCALE : f32 = 0.5;
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pub struct Particles
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{
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energy : [ [Color; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS],
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max_energy : Color,
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colorlists : [ [Color; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS],
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sigproc: Rc<RefCell<SignalProcessing>>,
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}
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impl Animation for Particles
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{
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fn new(sigproc: Rc<RefCell<SignalProcessing>>) -> Particles
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{
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Particles {
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energy: [ [Color{r: 0.0, g: 0.0, b: 0.0, w: 0.0}; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS],
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max_energy: Color{r: 1.0, g: 1.0, b: 1.0, w: 1.0},
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colorlists: [ [Color{r: 0.0, g: 0.0, b: 0.0, w: 0.0}; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS],
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sigproc: sigproc,
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}
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}
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fn init(&mut self) -> Result<()>
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{
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Ok(())
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}
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fn periodic(&mut self) -> Result<()>
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{
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let sigproc = self.sigproc.borrow();
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// extract frequency band energies
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let cur_energy = Color{
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r: sigproc.get_energy_in_band( 0.0, 400.0),
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g: sigproc.get_energy_in_band( 400.0, 4000.0),
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b: sigproc.get_energy_in_band( 4000.0, 12000.0),
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w: sigproc.get_energy_in_band(12000.0, 22000.0)};
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// track the maximum energy with cooldown
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self.max_energy.r *= COOLDOWN_FACTOR;
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if cur_energy.r > self.max_energy.r {
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self.max_energy.r = cur_energy.r;
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}
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self.max_energy.g *= COOLDOWN_FACTOR;
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if cur_energy.g > self.max_energy.g {
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self.max_energy.g = cur_energy.g;
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}
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self.max_energy.b *= COOLDOWN_FACTOR;
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if cur_energy.b > self.max_energy.b {
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self.max_energy.b = cur_energy.b;
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}
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self.max_energy.w *= COOLDOWN_FACTOR;
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if cur_energy.w > self.max_energy.w {
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self.max_energy.w = cur_energy.w;
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}
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// fade all LEDs towards black
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for strip in 0..config::NUM_STRIPS {
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for led in 0..config::NUM_LEDS_PER_STRIP {
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self.energy[strip][led].scale(FADE_FACTOR);
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}
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}
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// distribute the energy for each color
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let new_energy = Color{
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r: (cur_energy.r / self.max_energy.r).powf(RGB_EXPONENT),
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g: (cur_energy.g / self.max_energy.g).powf(RGB_EXPONENT),
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b: (cur_energy.b / self.max_energy.b).powf(RGB_EXPONENT),
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w: (cur_energy.w / self.max_energy.w).powf(W_EXPONENT),
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};
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let mut remaining_energy = new_energy;
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remaining_energy.scale(AVG_LEDS_ACTIVATED * config::NUM_LEDS_TOTAL as f32);
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let mut rng = rand::thread_rng();
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// FIXME: how to call this code for green, blue and white as well without too much
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// duplication?
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for coloridx in 0..=3 {
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let new_energy_ref = new_energy.ref_by_index(coloridx).unwrap();
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let rem_energy_ref = remaining_energy.ref_by_index_mut(coloridx).unwrap();
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while *rem_energy_ref > 0.0 {
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let mut rnd_energy = rng.gen::<f32>() * (*new_energy_ref) * 5.0;
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let rnd_strip = rng.gen_range(0..config::NUM_STRIPS);
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let rnd_led = rng.gen_range(0..config::NUM_LEDS_PER_STRIP);
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if rnd_energy > *rem_energy_ref {
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rnd_energy = *rem_energy_ref;
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*rem_energy_ref = 0.0;
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} else {
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*rem_energy_ref -= rnd_energy;
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}
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let led_ref = self.energy[rnd_strip][rnd_led].ref_by_index_mut(coloridx).unwrap();
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*led_ref += rnd_energy;
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}
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}
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// color post-processing
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self.colorlists = self.energy;
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for strip in 0..config::NUM_STRIPS {
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for led in 0..config::NUM_LEDS_PER_STRIP {
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self.colorlists[strip][led].w *= WHITE_EXTRA_SCALE;
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self.colorlists[strip][led].limit();
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}
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}
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Ok(())
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}
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fn get_colorlist(&self) -> &[ [Color; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS]
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{
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return &self.colorlists;
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}
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}
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}
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