From 851f2fb65067ea047acf78bc61ae2905cb8c9a28 Mon Sep 17 00:00:00 2001
From: Joe Ardent <code@ardent.nebcorp.com>
Date: Tue, 21 Feb 2023 14:10:49 -0800
Subject: [PATCH] make lean calc more robust

---
 src/action/systems.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/action/systems.rs b/src/action/systems.rs
index e3b0b0b..88605c9 100644
--- a/src/action/systems.rs
+++ b/src/action/systems.rs
@@ -64,8 +64,10 @@ pub(super) fn cyber_lean(
     let v2_r = v_squared / radius;
     let tan_theta = (v2_r / gravity).clamp(-FRAC_PI_3, FRAC_PI_3);
 
-    if v2_r.is_normal() {
+    if tan_theta.is_finite() && !tan_theta.is_subnormal() {
         lean.lean = tan_theta.atan().clamp(-FRAC_PI_4, FRAC_PI_4);
+    } else {
+        lean.lean = 0.0;
     }
 }