From c7286f257ec637f2d67e4b4a2bd1d70b4aff0116 Mon Sep 17 00:00:00 2001
From: Johannes Hofmann <Johannes.Hofmann@gmx.de>
Date: Sun, 17 Dec 2006 17:57:56 +0100
Subject: fix visibility

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

diff --git a/src/Panorama.cxx b/src/Panorama.cxx
index b6c0c10..32e5de2 100644
--- a/src/Panorama.cxx
+++ b/src/Panorama.cxx
@@ -504,7 +504,10 @@ int
 Panorama::is_visible(double a_alph) {
 	double center_dist;
 
-	center_dist = fabs(fmod(a_alph - parms.a_center, 2.0 * pi_d));
+	center_dist = fabs(a_alph - parms.a_center);
+	if (center_dist > pi_d) {
+		center_dist = 2*pi_d - center_dist;
+	}
 
 	return center_dist < proj->get_view_angle();
 }
-- 
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