From e6e56506f8785b23dbbc533b226794ed8b7b2405 Mon Sep 17 00:00:00 2001
From: Robert Garrett <robertgarrett404@gmail.com>
Date: Wed, 3 Sep 2025 14:11:18 -0500
Subject: [PATCH] Fix: `alignment` should align to vel, not impulse

I need to apply an impulse to match the velocities, but the previous
version was trying to match the forces.
---
 src/birdoids/mod.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/birdoids/mod.rs b/src/birdoids/mod.rs
index a530c203..5b84965c 100644
--- a/src/birdoids/mod.rs
+++ b/src/birdoids/mod.rs
@@ -256,7 +256,8 @@ fn alignment(
             continue;
         };
 
-        force.0 = (avg.extend(0.0) - force.0) * ALIGNMENT_FACTOR;
+        let boid_vel = boid_velocities.get(this_entt).unwrap();
+        force.0 += (avg.extend(0.0) - boid_vel.0) * ALIGNMENT_FACTOR;
     }
 }