From d876274ad19866c8395c97ef4fd1f31eddf3b23c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Minh=20Nguy=E1=BB=85n?= <mxn@1ec5.org>
Date: Wed, 6 May 2015 16:38:59 -0700
Subject: [PATCH] Prevent full-circle spin during animated rotation
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#1295 made #1199 a lot less common, but it was still possible for the map to do a full 180° when drift-rotating past due-south. With this change, the map is atomically rotated to a bearing in the same cycle as the final bearing.

/cc @friedbunny
---
 src/mbgl/map/transform.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mbgl/map/transform.cpp b/src/mbgl/map/transform.cpp
index ffe742296..1239f96f5 100644
--- a/src/mbgl/map/transform.cpp
+++ b/src/mbgl/map/transform.cpp
@@ -348,6 +348,7 @@ void Transform::_setAngle(double new_angle, const Duration duration) {
                            MapChangeRegionWillChange);
 
     final.angle = _normalizeAngle(new_angle, current.angle);
+    current.angle = _normalizeAngle(current.angle, final.angle);
 
     if (duration == Duration::zero()) {
         current.angle = final.angle;