robert/another-boids-in-rust
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Just use a for loop in the cohesion function

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I was trying to work out a way to run the loop using iterators, but
that doesn't really matter. I had an empty loop to consume the results,
which means I just have a for loop anyway.
This commit is contained in:
Robert Garrett
2024-07-10 08:40:48 -05:00
parent 3293706328
commit 38c1d779c1
1 changed files with 14 additions and 18 deletions
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30
src/birdoids_plugin.rs
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@@ -159,24 +159,20 @@ fn cohesion(
boids: Query<&Transform, With<Boid>>, boids: Query<&Transform, With<Boid>>,
mut velocities: Query<&mut Velocity, With<Boid>>, mut velocities: Query<&mut Velocity, With<Boid>>,
) { ) {
let it = boids.iter() for transform in &boids {
.map(|transform| { let neighbors = spatial_tree.within_distance(
let neighbors = spatial_tree.within_distance( transform.translation.xy(),
transform.translation.xy(), BOID_VIEW_RANGE
BOID_VIEW_RANGE );
); if neighbors.len() > 0 {
if neighbors.len() > 0 { let center_of_mass = neighbors.iter()
let center_of_mass = neighbors.iter() .map(|(pos, _opt_entity)| pos )
.map(|(pos, _opt_entity)| pos ) .sum::<Vec2>() / neighbors.len() as f32;
.sum::<Vec2>() / neighbors.len() as f32;
for mut velocity in &mut velocities { for mut velocity in &mut velocities {
let towards = (center_of_mass - transform.translation.xy()).normalize(); let towards = (center_of_mass - transform.translation.xy()).normalize();
**velocity += towards.extend(0.0) * COHESION_FACTOR; **velocity += towards.extend(0.0) * COHESION_FACTOR;
}
} }
}); }
for _ in it{
continue;
} }
} }