From 3eb6bdb6c268c5b0098322ca17a815a6cde403f0 Mon Sep 17 00:00:00 2001
From: Alfredo Tupone <atupone@gmail.com>
Date: Wed, 26 Jun 2024 22:18:15 +0200
Subject: [PATCH] fix a divide by 0

---
 src/bzflag/effectsRenderer.cxx | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/bzflag/effectsRenderer.cxx b/src/bzflag/effectsRenderer.cxx
index 86d3fb3f26..73a4e47821 100644
--- a/src/bzflag/effectsRenderer.cxx
+++ b/src/bzflag/effectsRenderer.cxx
@@ -1038,9 +1038,8 @@ void FlashShotEffect::draw(const SceneRenderer &)
     //         - camerapos[1] * sin(-rotation[2]);
     camerapos[1] = camerapos[1] * cos(-rotation[2])
                    + camerapos[0] * sin(-rotation[2]);
-    glRotatef(270 - atan(camerapos[1] / camerapos[2]) / deg2Rad +
-              (camerapos[2] >= 0 ? 180 : 0), //for a single-sided face
-              0,1,0);
+    //for a single-sided face
+    glRotatef(std::atan2(camerapos[2], camerapos[1]) / deg2Rad, 0,1,0);
 
     ringState.setState();