Added new "racers" animation

This commit is contained in:
Thomas Kolb 2022-03-19 23:46:55 +01:00
parent ec904b45f0
commit fb1eae119e
3 changed files with 306 additions and 1 deletions

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@ -13,6 +13,7 @@ type Result<T> = std::result::Result<T, AnimationError>;
pub mod particles;
pub mod sparkles;
pub mod racers;
/////////// Error Type and Implementation ////////////

303
src/animation/racers.rs Normal file
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@ -0,0 +1,303 @@
// vim: noet
use crate::animation::{Color, Animation, Result};
use crate::signal_processing::SignalProcessing;
use crate::config;
use std::rc::Rc;
use std::cell::RefCell;
use rand::Rng;
const COOLDOWN_FACTOR : f32 = 0.99980;
const RGB_EXPONENT : f32 = 1.5;
const W_EXPONENT : f32 = 2.2;
const W_SCALE : f32 = 0.5;
const BRIGHTNESS_FILTER_ALPHA : f32 = 0.1;
const NUM_RACERS_R : usize = 10;
const NUM_RACERS_G : usize = 10;
const NUM_RACERS_B : usize = 10;
const RACER_MIN_SPEED_R : f32 = 0.5 / config::FPS_ANIMATION;
const RACER_MAX_SPEED_R : f32 = 30.0 / config::FPS_ANIMATION;
const RACER_MIN_BRIGHTNESS_R : f32 = 0.01;
const RACER_MAX_BRIGHTNESS_R : f32 = 1.00;
const RACER_MIN_SPEED_G : f32 = 0.5 / config::FPS_ANIMATION;
const RACER_MAX_SPEED_G : f32 = 30.0 / config::FPS_ANIMATION;
const RACER_MIN_BRIGHTNESS_G : f32 = 0.01;
const RACER_MAX_BRIGHTNESS_G : f32 = 1.00;
const RACER_MIN_SPEED_B : f32 = 0.5 / config::FPS_ANIMATION;
const RACER_MAX_SPEED_B : f32 = 30.0 / config::FPS_ANIMATION;
const RACER_MIN_BRIGHTNESS_B : f32 = 0.01;
const RACER_MAX_BRIGHTNESS_B : f32 = 1.00;
const SPEED_SCALE_RANGE : f32 = 0.10;
/*
* A racer is a point of light that can move along the LED strips.
*/
struct Racer
{
min_speed: f32, // LEDs per frame
max_speed: f32, // LEDs per frame
direction: i8, // either +1 or -1
min_brightness: f32,
max_brightness: f32,
color: Color,
pos: f32,
brightness: f32,
flare_brightness: f32,
}
impl Racer
{
pub fn new(min_speed: f32, max_speed: f32, min_brightness: f32, max_brightness: f32, color: Color, start_pos: f32) -> Racer
{
Racer {
min_speed: min_speed,
max_speed: max_speed,
min_brightness: min_brightness,
max_brightness: max_brightness,
direction: 1,
color: color,
pos: start_pos,
brightness: min_brightness,
flare_brightness: 0.0,
}
}
fn _pos2ledstrip(pos: i32) -> (i32, i32)
{
let strip = pos / (config::NUM_LEDS_PER_STRIP as i32);
let mut led = pos % (config::NUM_LEDS_PER_STRIP as i32);
if (strip % 2) == 1 {
led = (config::NUM_LEDS_PER_STRIP as i32) - led - 1;
}
(strip, led)
}
pub fn update(&mut self, brightness: f32, flare_brightness: f32)
{
// move along the strip
let cur_speed = self.min_speed + brightness * (self.max_speed - self.min_speed);
self.pos += (self.direction as f32) * cur_speed;
let maxpos = config::NUM_LEDS_TOTAL as f32;
// if the end is reached, reverse the direction
if self.pos >= maxpos {
self.direction = -1;
self.pos = 2.0 * maxpos - self.pos;
} else if self.pos <= 0.0 {
self.direction = 1;
self.pos = -self.pos;
}
self.brightness = brightness;
self.flare_brightness = flare_brightness;
}
pub fn render(&self, colorlists: &mut [ [Color; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS])
{
let brightness = self.min_brightness + self.brightness * (self.max_brightness - self.min_brightness);
let fract_led = self.pos - self.pos.floor();
let led1_idx = self.pos.floor() as i32;
let led2_idx = self.pos.ceil() as i32;
let mut color = self.color;
color.w += self.flare_brightness;
let led1_color = color.scaled_copy((1.0 - fract_led) * brightness);
let led2_color = color.scaled_copy(fract_led * brightness);
if led1_idx >= 0 {
let (strip, led) = Racer::_pos2ledstrip(led1_idx);
colorlists[strip as usize][led as usize].add(&led1_color);
}
if led2_idx < (config::NUM_LEDS_TOTAL as i32) {
let (strip, led) = Racer::_pos2ledstrip(led2_idx);
colorlists[strip as usize][led as usize].add(&led2_color);
}
}
}
pub struct Racers
{
max_energy : Color,
filtered_energy : Color,
racers_r : Vec<Racer>,
racers_g : Vec<Racer>,
racers_b : Vec<Racer>,
colorlists : [ [Color; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS],
sigproc: Rc<RefCell<SignalProcessing>>,
}
impl Animation for Racers
{
fn new(sigproc: Rc<RefCell<SignalProcessing>>) -> Racers
{
Racers {
max_energy: Color{r: 1.0, g: 1.0, b: 1.0, w: 1.0},
filtered_energy: Color{r: 0.0, g: 0.0, b: 0.0, w: 0.0},
racers_r: Vec::with_capacity(NUM_RACERS_R),
racers_g: Vec::with_capacity(NUM_RACERS_G),
racers_b: Vec::with_capacity(NUM_RACERS_B),
colorlists: [ [Color{r: 0.0, g: 0.0, b: 0.0, w: 0.0}; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS],
sigproc: sigproc,
}
}
fn init(&mut self) -> Result<()>
{
let mut rng = rand::thread_rng();
for _i in 0 .. NUM_RACERS_R {
let start_pos = rng.gen::<f32>() * (config::NUM_LEDS_TOTAL as f32);
let speed_scale = 1.0 + SPEED_SCALE_RANGE * (rng.gen::<f32>() - 0.5);
self.racers_r.push(Racer::new(
RACER_MIN_SPEED_R * speed_scale,
RACER_MAX_SPEED_R * speed_scale,
RACER_MIN_BRIGHTNESS_R,
RACER_MAX_BRIGHTNESS_R,
Color{r: 1.0, g: 0.0, b: 0.0, w: 0.0},
start_pos));
}
for _i in 0 .. NUM_RACERS_G {
let start_pos = rng.gen::<f32>() * (config::NUM_LEDS_TOTAL as f32);
let speed_scale = 1.0 + SPEED_SCALE_RANGE * (rng.gen::<f32>() - 0.5);
self.racers_g.push(Racer::new(
RACER_MIN_SPEED_G * speed_scale,
RACER_MAX_SPEED_G * speed_scale,
RACER_MIN_BRIGHTNESS_G,
RACER_MAX_BRIGHTNESS_G,
Color{r: 0.0, g: 1.0, b: 0.0, w: 0.0},
start_pos));
}
for _i in 0 .. NUM_RACERS_B {
let start_pos = rng.gen::<f32>() * (config::NUM_LEDS_TOTAL as f32);
let speed_scale = 1.0 + SPEED_SCALE_RANGE * (rng.gen::<f32>() - 0.5);
self.racers_b.push(Racer::new(
RACER_MIN_SPEED_B * speed_scale,
RACER_MAX_SPEED_B * speed_scale,
RACER_MIN_BRIGHTNESS_B,
RACER_MAX_BRIGHTNESS_B,
Color{r: 0.0, g: 0.0, b: 1.0, w: 0.0},
start_pos));
}
Ok(())
}
fn periodic(&mut self) -> Result<()>
{
let sigproc = self.sigproc.borrow();
// extract frequency band energies
let cur_energy = Color{
r: sigproc.get_energy_in_band( 0.0, 400.0),
g: sigproc.get_energy_in_band( 400.0, 4000.0),
b: sigproc.get_energy_in_band( 4000.0, 12000.0),
w: sigproc.get_energy_in_band(12000.0, 22000.0)};
// track the maximum energy with cooldown
self.max_energy.r *= COOLDOWN_FACTOR;
if cur_energy.r > self.max_energy.r {
self.max_energy.r = cur_energy.r;
}
self.max_energy.g *= COOLDOWN_FACTOR;
if cur_energy.g > self.max_energy.g {
self.max_energy.g = cur_energy.g;
}
self.max_energy.b *= COOLDOWN_FACTOR;
if cur_energy.b > self.max_energy.b {
self.max_energy.b = cur_energy.b;
}
self.max_energy.w *= COOLDOWN_FACTOR;
if cur_energy.w > self.max_energy.w {
self.max_energy.w = cur_energy.w;
}
// set all LEDs initially to black
for strip in 0..config::NUM_STRIPS {
for led in 0..config::NUM_LEDS_PER_STRIP {
//self.colorlists[strip][led].scale(FADE_FACTOR);
self.colorlists[strip][led] = Color{r: 0.0, g: 0.0, b: 0.0, w: 0.0};
}
}
// rescaling and normalization of the energies
let scaled_energy = Color{
r: (cur_energy.r / self.max_energy.r).powf(RGB_EXPONENT),
g: (cur_energy.g / self.max_energy.g).powf(RGB_EXPONENT),
b: (cur_energy.b / self.max_energy.b).powf(RGB_EXPONENT),
w: (cur_energy.w / self.max_energy.w).powf(W_EXPONENT) * W_SCALE,
};
for i in 0..4 {
let f = self.filtered_energy.ref_by_index_mut(i).unwrap();
let n = scaled_energy.ref_by_index(i).unwrap();
*f = (1.0 - BRIGHTNESS_FILTER_ALPHA) * (*f) + BRIGHTNESS_FILTER_ALPHA * (*n);
}
// update all racers
let f = &self.filtered_energy;
self.racers_r.iter_mut().for_each(|x| x.update(f.r, f.w));
self.racers_g.iter_mut().for_each(|x| x.update(f.g, f.w));
self.racers_b.iter_mut().for_each(|x| x.update(f.b, f.w));
// render all racers
for racer in self.racers_r.iter() {
racer.render(&mut self.colorlists);
}
for racer in self.racers_g.iter() {
racer.render(&mut self.colorlists);
}
for racer in self.racers_b.iter() {
racer.render(&mut self.colorlists);
}
// color post-processing
for strip in 0..config::NUM_STRIPS {
for led in 0..config::NUM_LEDS_PER_STRIP {
self.colorlists[strip][led].limit();
}
}
Ok(())
}
fn get_colorlist(&self) -> &[ [Color; config::NUM_LEDS_PER_STRIP]; config::NUM_STRIPS]
{
return &self.colorlists;
}
}

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@ -44,7 +44,8 @@ fn main()
// TODO: let the user select via the command line
//let mut anim: animation::particles::Particles = animation::Animation::new(sigproc.clone());
let mut anim: animation::sparkles::Sparkles = animation::Animation::new(sigproc.clone());
//let mut anim: animation::sparkles::Sparkles = animation::Animation::new(sigproc.clone());
let mut anim: animation::racers::Racers = animation::Animation::new(sigproc.clone());
println!("Calling Animation::init()...");