From 5f137b41ebeadfca3907221713f85f2c9fe431bf Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Sun, 23 Aug 2026 11:25:20 -0700
Subject: entityID newtype

---
 src/sim/entity/mod.rs | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'src/sim/entity')

diff --git a/src/sim/entity/mod.rs b/src/sim/entity/mod.rs
index 0d8ae71..044d07c 100644
--- a/src/sim/entity/mod.rs
+++ b/src/sim/entity/mod.rs
@@ -89,20 +89,23 @@ impl EntityDef {
     }
 }
 
+#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
+pub struct EntityId(pub u32);
+
 pub struct EntityData {
-    pub id: u32,
+    pub id: EntityId,
     pub rb_h: Option<RigidBodyHandle>,
     pub collider_h: Option<ColliderHandle>,
     pub cells: Option<EntityCells>,
 }
 
 pub struct EntityUpdateResult {
-    pub deferred_destructions: Vec<u32>,
+    pub deferred_destructions: Vec<EntityId>,
 }
 
 pub struct EntityUpdateCtx<'a> {
     pub entity_data: &'a mut EntityData,
-    deferred_destructions: Vec<u32>,
+    deferred_destructions: Vec<EntityId>,
 }
 
 impl<'a> EntityUpdateCtx<'a> {
@@ -112,7 +115,7 @@ impl<'a> EntityUpdateCtx<'a> {
             deferred_destructions: Vec::new(),
         }
     }
-    pub fn deferred_destroy(&mut self, entity_id: u32) {
+    pub fn deferred_destroy(&mut self, entity_id: EntityId) {
         self.deferred_destructions.push(entity_id);
     }
     pub fn to_result(self) -> EntityUpdateResult {
@@ -177,7 +180,7 @@ impl Entity {
     }
 
     pub fn new(
-        id: u32,
+        id: EntityId,
         rb_h: Option<RigidBodyHandle>,
         collider_h: Option<ColliderHandle>,
         cells: Option<EntityCells>,
-- 
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