From 3277026f492d8ff74a53f542b4de96e33bf08d49 Mon Sep 17 00:00:00 2001
From: Erik Onarheim <erik.onarheim@gmail.com>
Date: Tue, 17 Dec 2024 19:07:37 -0600
Subject: [PATCH] fix: collision crash, guard invalid separation

---
 CHANGELOG.md                                         | 2 +-
 src/engine/Collision/Colliders/CollisionJumpTable.ts | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78eacd500..5f47356c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,7 +19,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
--
+- Fixed CollidePolygonPolygon crash with some defense against invalid separation
 
 ### Updates
 
diff --git a/src/engine/Collision/Colliders/CollisionJumpTable.ts b/src/engine/Collision/Colliders/CollisionJumpTable.ts
index 72883930f..aec114017 100644
--- a/src/engine/Collision/Colliders/CollisionJumpTable.ts
+++ b/src/engine/Collision/Colliders/CollisionJumpTable.ts
@@ -253,6 +253,10 @@ export const CollisionJumpTable = {
       }
     }
 
+    if (!separation.localSide || !separation.localAxis || !separation.axis) {
+      return [];
+    }
+
     // Clip incident side by the perpendicular lines at each end of the reference side
     // https://en.wikipedia.org/wiki/Sutherland%E2%80%93Hodgman_algorithm
     const referenceSide = separation.localSide.transform(toIncidentFrame);