From e45cb5d0aa3b02ce351d7a03b49fb5a1e35fcc02 Mon Sep 17 00:00:00 2001
From: andy <andy>
Date: Thu, 21 Mar 2002 03:35:52 +0000
Subject: [PATCH] Found by inspection a bug in the generation of orientation
 matrices for fuselage Surface objects.  If the fuselage wasn't aligned
 perpendicular to the Y axis, the matrix wouldn't be orthonormal.  Since all
 of, perhaps, three aircraft have ever been built this way, it's doubtful I
 would have found this as a bug report. :)

---
 src/FDM/YASim/Airplane.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/FDM/YASim/Airplane.cpp b/src/FDM/YASim/Airplane.cpp
index c70db6671..3e5b689f0 100644
--- a/src/FDM/YASim/Airplane.cpp
+++ b/src/FDM/YASim/Airplane.cpp
@@ -431,6 +431,8 @@ float Airplane::compileFuselage(Fuselage* f)
         Math::unit3(fwd, x);
         y[0] = 0; y[1] = 1; y[2] = 0;
         Math::cross3(x, y, z);
+	Math::unit3(z, z);
+	Math::cross3(z, x, y);
         s->setOrientation(o);
 
         _model.addSurface(s);
-- 
2.39.5