From 6350e4ffca8ce1e46465284ef3d7559e0f40229b Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Sat, 22 Aug 2026 13:54:00 -0700
Subject: fixes and refactors

---
 src/sim/cell/materials/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/sim/cell/materials/mod.rs')

diff --git a/src/sim/cell/materials/mod.rs b/src/sim/cell/materials/mod.rs
index e2b5fc6..ee2b4d0 100644
--- a/src/sim/cell/materials/mod.rs
+++ b/src/sim/cell/materials/mod.rs
@@ -1,4 +1,4 @@
-use crate::sim::cell_sim::sim::UpdateCtx;
+use crate::sim::cell_sim::sim::{PostUpdateAction, UpdateCtx};
 
 pub mod fire;
 pub mod gas;
@@ -31,7 +31,7 @@ pub struct MaterialDef {
     pub color: (u8, u8, u8, u8),
     pub density: u8,
     pub form: MaterialForm,
-    pub sim_update: Option<fn(ctx: &mut UpdateCtx) -> ()>,
+    pub sim_update: Option<fn(ctx: &mut UpdateCtx) -> PostUpdateAction>,
 }
 
 static MATERIALS: [MaterialDef; 6] = [
-- 
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