From 5283b70a83acdbaa9c37f33852fc1ac9a86f7c6b Mon Sep 17 00:00:00 2001
From: Garux <garux@mail.ru>
Date: Thu, 14 Oct 2021 14:33:44 +0300
Subject: [PATCH] * fix decompilation of brushes with edge case face normal (
 -0.577350259 -0.577350259 0.577350259 ) and MakeNormalVectors() in general

---
 tools/quake3/common/qmath.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/quake3/common/qmath.h b/tools/quake3/common/qmath.h
index 4c90617f..7d77296d 100644
--- a/tools/quake3/common/qmath.h
+++ b/tools/quake3/common/qmath.h
@@ -263,14 +263,21 @@ inline void ComputeAxisBase( const BasicVector3<Element>& normal, BasicVector3<O
    ================
  */
 inline void MakeNormalVectors( const Vector3& forward, Vector3& right, Vector3& up ){
+#if 0
 	// this rotate and negate guarantees a vector
 	// not colinear with the original
+	//! fails with forward( -0.577350259 -0.577350259 0.577350259 )
+	//! colinear right( 0.577350259 0.577350259 -0.577350259 )
 	right[1] = -forward[0];
 	right[2] = forward[1];
 	right[0] = forward[2];
 
 	right = VectorNormalized( right - forward * vector3_dot( right, forward ) );
 	up = vector3_cross( right, forward );
+#else
+	right = VectorNormalized( vector3_cross( g_vector3_axes[ vector3_min_abs_component_index( forward ) ], forward ) );
+	up = vector3_cross( right, forward );
+#endif
 }