src/main.rs

@@ -1,9 +1,9 @@
-// #![allow(unused)]
+#![allow(unused)]
 
 mod boid_mesh;
 mod boundary;
 
-use bevy::{color::palettes::tailwind, prelude::*, sprite::MaterialMesh2dBundle};
+use bevy::{color::palettes::tailwind, prelude::*, reflect::List, sprite::MaterialMesh2dBundle};
 use boid_mesh::BoidMesh;
 use rand::{Rng, SeedableRng};
 
@@ -15,10 +15,8 @@ fn main() {
         .add_systems(
             Update,
             (
-                build_local_cache,
                 (seperation, cohesion, alignment),
-                accelerate,
-                move_boids,
+                (accelerate, move_boids).chain(),
                 boundary::boid_border_teleport,
             )
                 .chain(),
@@ -53,8 +51,7 @@ struct BoidBundle {
     mesh: MaterialMesh2dBundle<ColorMaterial>,
     velocity: Velocity,
     boid: Boid,
-    accel_cache: BoidAccelerationBundle,
-    local_cache: LocalCache,
+    cache: BoidAccelerationBundle,
 }
 
 #[derive(Component, Default)]
@@ -83,38 +80,11 @@ fn build_local_cache(
         });
 }
 
-fn seperation(
-    mut boids: Query<(&Transform, &LocalCache, &mut SeperationAcceleration), With<Boid>>,
-) {
-}
+fn seperation(mut boids: Query<(Entity, &Transform, &mut SeperationAcceleration), With<Boid>>) {}
 
-fn cohesion(mut boids: Query<(&Transform, &LocalCache, &mut CohesionAcceleration), With<Boid>>) {}
+fn cohesion(mut boids: Query<(Entity, &Transform, &mut CohesionAcceleration), With<Boid>>) {}
 
-fn alignment(
-    mut boids: Query<(&Velocity, &LocalCache, &mut AlignmentAcceleration), With<Boid>>,
-    other_boids: Query<&Velocity, With<Boid>>,
-) {
-    const MAX_FORCE: f32 = 50.;
-
-    boids
-        .par_iter_mut()
-        .for_each(|(velocity, local, mut accel)| {
-            accel.0 = Vec2::ZERO;
-            let mut count = 0;
-            for other_velocity in other_boids.iter_many(&local.0[..]) {
-                accel.0 += other_velocity.0;
-
-                count += 1;
-            }
-
-            if count > 0 {
-                accel.0 /= count as f32;
-                accel.0 -= velocity.0;
-
-                accel.0 = accel.0.clamp_length_max(MAX_FORCE);
-            }
-        });
-}
+fn alignment(mut boids: Query<(Entity, &Transform, &mut AlignmentAcceleration), With<Boid>>) {}
 
 fn accelerate(
     mut boids: Query<
@@ -135,12 +105,9 @@ fn accelerate(
             vel.0 += coh.0 * time.delta_seconds();
             vel.0 += ali.0 * time.delta_seconds();
 
-            vel.0 *= 1.005;
-            vel.0 = vel.0.clamp_length_max(200.);
-
             sep.0 *= 0.;
-            coh.0 *= 0.;
-            ali.0 *= 0.;
+            sep.0 *= 0.;
+            sep.0 *= 0.;
         });
 }
 
@@ -170,7 +137,7 @@ fn setup(
     let lower_height = -half_height;
     let upper_height = half_height;
 
-    for _ in 0..1000 {
+    for i in 0..1000 {
         use std::f32::consts::TAU;
 
         let x = small_rng.gen_range(lower_width..=upper_width);