From: Han-Wen Nienhuys <hanwen@lilypond.org>
Date: Fri, 18 Mar 2011 02:17:14 +0000 (-0300)
Subject: Fix inverted sign on relative offset for beam-collisions.
X-Git-Tag: release/2.13.55-1~10
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=2533d976e5218f47bef6ae81fb51d6722f6dd895;p=lilypond.git

Fix inverted sign on relative offset for beam-collisions.

This fixes #1565.
---

diff --git a/input/regression/beam-collision-cross-staff.ly b/input/regression/beam-collision-cross-staff.ly
new file mode 100644
index 0000000000..d546aafa18
--- /dev/null
+++ b/input/regression/beam-collision-cross-staff.ly
@@ -0,0 +1,12 @@
+\header {
+  texidoc = "cross staff beams work with collisions."
+}
+
+\version "2.13.55"
+
+<< 
+ \new Staff = "PianoRH" s4.
+ \new Staff = "PianoLH" {
+   d''8 [b''! \change Staff = "PianoRH"  d'' ]
+ }
+>>
diff --git a/lily/beam.cc b/lily/beam.cc
index e3135dadfa..6fbd71d7d6 100644
--- a/lily/beam.cc
+++ b/lily/beam.cc
@@ -1276,7 +1276,7 @@ Beam::shift_region_to_valid (SCM grob, SCM posns)
               left_y -= dy;
 
               // Translate back to beam as ref point.
-              left_y -= -me->relative_coordinate (common[Y_AXIS], Y_AXIS);
+              left_y -= me->relative_coordinate (common[Y_AXIS], Y_AXIS);
             
               Interval allowed;
               allowed.set_full ();