From a4a121694c270b11a8c846b5d5ce71d15e8f0d58 Mon Sep 17 00:00:00 2001
From: EvilSpirit <anandamide@mail.ru>
Date: Mon, 4 Jul 2016 13:57:46 +0600
Subject: [PATCH] Reimplement commit 0b999f4 correctly.

---
 src/mesh.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mesh.cpp b/src/mesh.cpp
index f4d18ccf..65381860 100644
--- a/src/mesh.cpp
+++ b/src/mesh.cpp
@@ -1042,7 +1042,10 @@ void SKdNode::MakeOutlinesInto(SOutlineList *sol) const
 }
 
 bool SOutline::IsVisible(Vector projDir) const {
-    return (nl.Dot(projDir) > LENGTH_EPS) == (nr.Dot(projDir) < LENGTH_EPS);
+    double ldot = nl.Dot(projDir);
+    double rdot = nr.Dot(projDir);
+    return (ldot > -LENGTH_EPS) == (rdot < LENGTH_EPS) ||
+           (rdot > -LENGTH_EPS) == (ldot < LENGTH_EPS);
 }
 
 void SOutlineList::Clear() {