compb-dla-model/src/system/model.rs
Joshua Coles 7216fd561e
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A great re-architecture of the cli
2023-03-08 16:16:44 +00:00

141 lines
3.8 KiB
Rust

use rand::prelude::*;
use serde::Serialize;
use crate::system::{Position, Storage};
use crate::system::spawner::Spawner;
use crate::system::sticker::Sticker;
use crate::system::walker::Walker;
#[derive(Serialize)]
pub struct HistoryLine<P: Position> {
pub frame: usize,
pub cluster_radius: f32,
pub fd: f32,
pub position: P,
}
pub struct DLASystem<R: Rng, P: Position, S: Storage<P>, W: Walker<P>, Sp: Spawner<P>, St: Sticker<P, S>> {
rng: R,
/*
* These object encapsulate the behaviour of our particular model.
*/
/*
* The space, along with the chosen position choose the embedding space that the cluster grows
* in.
*/
space: S,
/*
* Walkers allow us to choose between different particle movement behaviours, eg random or
* biased walker
*/
walker: W,
spawner: Sp,
sticker: St,
pub frame: usize,
pub running: bool,
pub history: Vec<HistoryLine<P>>,
max_particles: usize,
particles: Vec<P>,
active_particle: Option<P>,
add_ratio: f32,
add_circle: f32,
kill_ratio: f32,
kill_circle: f32,
cluster_radius: f32,
}
impl<R: Rng, P: Position, S: Storage<P>, W: Walker<P>, Sp: Spawner<P>, St: Sticker<P, S>> DLASystem<R, P, S, W, Sp, St> {
pub fn new(rng: R, space: S, walker: W, spawner: Sp, sticker: St, max_particles: usize) -> Self {
let mut sys = DLASystem {
rng,
max_particles,
running: true,
spawner,
sticker,
space,
walker,
frame: 0,
particles: vec![],
history: vec![],
active_particle: None,
add_ratio: 1.2,
kill_ratio: 1.7,
add_circle: 10.0,
kill_circle: 20.0,
cluster_radius: 0.0,
};
sys.deposit(&P::zero());
sys
}
pub fn update(&mut self) {
self.frame += 1;
if self.active_particle.is_some() {
self.move_particle();
} else if self.particles.len() < self.max_particles {
self.spawn_particle();
} else {
self.running = false;
}
}
fn move_particle(&mut self) {
let current_position = &self
.active_particle
.clone()
.expect("No active particle");
let next_position = self.walker.walk(&mut self.rng, current_position);
let distance = next_position.abs();
if distance > self.kill_circle {
self.active_particle = None;
} else if !self.space.is_occupied(&next_position) {
if self.sticker.should_stick(&mut self.rng, &self.space, &next_position) {
self.deposit(&next_position);
self.active_particle = None;
return;
} else {
self.active_particle.replace(next_position);
}
}
}
fn spawn_particle(&mut self) {
let position = self.spawner.spawn(&mut self.rng, self.add_circle);
if !self.space.is_occupied(&position) {
self.active_particle = Some(position);
}
}
fn deposit(&mut self, p0: &P) {
self.particles.push(p0.clone());
self.space.deposit(p0);
let distance = p0.abs();
if distance > self.cluster_radius {
self.cluster_radius = distance;
let new_add_circle = (self.cluster_radius * self.add_ratio).max(self.cluster_radius + 5.0);
if self.add_circle < new_add_circle {
self.add_circle = new_add_circle;
self.kill_circle = self.kill_ratio * self.add_circle;
}
}
self.history.push(HistoryLine { frame: self.frame, position: p0.clone(), cluster_radius: self.cluster_radius, fd: (self.particles.len() as f32).ln() / self.cluster_radius.ln() });
}
}