From da01c6e887d6865f0ad75c8dfe68bbad702afb99 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Tue, 25 Aug 2026 00:41:17 -0700
Subject: tweaks

---
 src/sim/lib/force.rs       | 6 +++++-
 src/sim/sim_manager/mod.rs | 4 +++-
 2 files changed, 8 insertions(+), 2 deletions(-)

(limited to 'src/sim')

diff --git a/src/sim/lib/force.rs b/src/sim/lib/force.rs
index d461589..e3150c0 100644
--- a/src/sim/lib/force.rs
+++ b/src/sim/lib/force.rs
@@ -100,12 +100,13 @@ pub fn apply_explosion(
 // TODO profile packing entity ID into cells?
 // TODO sink power in a radius around the impact
 // might improve performance by a lot if we don't have to raycast for hit entities
-pub fn apply_bullet(ctx: &mut SimCtx, from: Vec2, to: Vec2, power: u32) {
+pub fn apply_bullet(ctx: &mut SimCtx, from: Vec2, to: Vec2, power: u32) -> Vec2 {
     let dda = AwDda::new(from, to);
     let mut p = power as i32;
 
     let dir = (to - from).normalize();
 
+    let mut stopped_at = to;
     for collision in dda {
         if let Some(cell) = ctx
             .cell_manager
@@ -124,6 +125,7 @@ pub fn apply_bullet(ctx: &mut SimCtx, from: Vec2, to: Vec2, power: u32) {
 
             p -= m.density as i32;
             if p <= 0 {
+                stopped_at = collision.as_vec2();
                 break;
             }
 
@@ -145,4 +147,6 @@ pub fn apply_bullet(ctx: &mut SimCtx, from: Vec2, to: Vec2, power: u32) {
             }
         }
     }
+
+    stopped_at
 }
diff --git a/src/sim/sim_manager/mod.rs b/src/sim/sim_manager/mod.rs
index 8cb5eb3..8849a1d 100644
--- a/src/sim/sim_manager/mod.rs
+++ b/src/sim/sim_manager/mod.rs
@@ -276,8 +276,10 @@ impl SimManager {
             self.cell_manager = CellManager::from_default_size();
         }
         if input_manager.pressed(Input::ClearEntities) {
-            let entities: Vec<EntityId> = self.entities.drain().map(|(id, _)| id).collect();
+            // TODO drain doesn't work here?
+            let entities: Vec<EntityId> = self.entities.keys().cloned().collect();
             entities.iter().for_each(|&id| self.destroy_entity(id));
+            self.entities.clear();
         }
         if input_manager.pressed(Input::ClearParticles) {
             self.particle_manager.particles = Vec::new();
-- 
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