From cdc1dcec369dcd0d689ac07fe511858a2ec69a36 Mon Sep 17 00:00:00 2001
From: yuni <hut@hut.pm>
Date: Mon, 16 Sep 2024 04:07:36 +0200
Subject: [PATCH] fix crash in handle_wants_lookat/trans.up() when
 trans.translation is 0

---
 src/actor.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/actor.rs b/src/actor.rs
index 81fb8d2..4c769bf 100644
--- a/src/actor.rs
+++ b/src/actor.rs
@@ -624,7 +624,12 @@ fn handle_wants_lookat(
         } else {
             continue;
         };
-        rot.0 = look_at_quat(**pos, target_pos, trans.up().as_dvec3());
+        let up = if trans.translation.length_squared() > 1e-6 {
+            trans.up()
+        } else {
+            Dir3::Y
+        };
+        rot.0 = look_at_quat(**pos, target_pos, up.as_dvec3());
     }
 }