basic gizmo testing

Cargo.toml

@@ -14,6 +14,7 @@ features = [
   "bevy_color",
   "bevy_render",
   "bevy_winit",
+  "bevy_gizmos",
   "multi_threaded",
   "x11",
   "wayland",

src/main.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::type_complexity)]
 // #![allow(unused)]
 
 mod acceleration;
@@ -21,6 +22,7 @@ fn main() {
             Update,
             (
                 build_local_cache,
+                (seperation_gizmos),
                 (seperation, cohesion, alignment),
                 accelerate,
                 move_boids,
@@ -31,6 +33,9 @@ fn main() {
         .run();
 }
 
+#[derive(Component, Default)]
+struct DrawGizmos;
+
 #[derive(Component, Default)]
 struct Boid;
 
@@ -82,7 +87,7 @@ fn cohesion(
             accel.0 = Vec2::ZERO;
 
             let mut count = 0;
-            for transform in other_boids.iter_many(&local.0[..]) {
+            for transform in other_boids.iter_many(&local.0) {
                 accel.0 += transform.translation.xy();
 
                 count += 1;
@@ -93,6 +98,22 @@ fn cohesion(
         })
 }
 
+fn seperation_gizmos(
+    boids: Query<(&Transform, &LocalCache), (With<Boid>, With<DrawGizmos>)>,
+    other_boids: Query<&Transform, With<Boid>>,
+    mut gizmos: Gizmos,
+) {
+    boids.iter().for_each(|(transform, local)| {
+        other_boids.iter_many(&local.0).for_each(|other_transform| {
+            gizmos.arrow_2d(
+                transform.translation.xy(),
+                other_transform.translation.xy(),
+                tailwind::ROSE_500,
+            );
+        })
+    });
+}
+
 fn seperation(
     mut boids: Query<(&Transform, &LocalCache, &mut SeperationAcceleration), With<Boid>>,
     other_boids: Query<&Transform, With<Boid>>,
@@ -110,7 +131,7 @@ fn alignment(
         .for_each(|(velocity, local, mut accel)| {
             accel.0 = Vec2::ZERO;
             let mut count = 0;
-            for other_velocity in other_boids.iter_many(&local.0[..]) {
+            for other_velocity in other_boids.iter_many(&local.0) {
                 accel.0 += other_velocity.0;
 
                 count += 1;
@@ -179,7 +200,7 @@ 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);
@@ -187,7 +208,7 @@ fn setup(
 
         let angle = small_rng.gen_range(-TAU..=TAU);
 
-        commands.spawn(BoidBundle {
+        let mut entity_commands = commands.spawn(BoidBundle {
             mesh: MaterialMesh2dBundle {
                 mesh: boid_mesh.0.clone(),
                 material: boid_color.clone(),
@@ -198,6 +219,10 @@ fn setup(
             velocity: Velocity(Vec2::from_angle(angle) * 200.),
             ..default()
         });
+
+        if i == 0 {
+            entity_commands.insert(DrawGizmos);
+        }
     }
 
     commands.spawn(Camera2dBundle::default());