From 2037b5681f83a2c1a649c821ab5b6aee8d62e8d2 Mon Sep 17 00:00:00 2001
From: Camden Dixie O'Brien <cobrien@witekio.com>
Date: Sun, 21 Sep 2025 13:46:31 +0100
Subject: [PATCH] Prevent potential divide by zero in vec3_unit()

---
 src/vec3.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/vec3.c b/src/vec3.c
index c71291d..5dd2e80 100644
--- a/src/vec3.c
+++ b/src/vec3.c
@@ -47,5 +47,6 @@ double vec3_len(vec3_t v)
 
 vec3_t vec3_unit(vec3_t v)
 {
-	return vec3_scale(v, 1.0 / vec3_len(v));
+	const double l = vec3_len(v);
+	return l == 0 ? v : vec3_scale(v, 1.0 / l);
 }