From d20e6f3542b828f647ee06f4a0b27714280784e6 Mon Sep 17 00:00:00 2001
From: Han-Wen Nienhuys <hanwen@xs4all.nl>
Date: Wed, 31 Mar 2004 10:49:00 +0000
Subject: [PATCH] * scm/part-combiner.scm (determine-split-list): split for
 voice crossings

* input/regression/part-combine-cross.ly: new file.

* scm/part-combiner.scm (make-part-combine-music): don't do
relative inside partcombine arguments.
---
 ChangeLog                              |  5 +++++
 input/regression/part-combine-cross.ly | 16 ++++++++++++++++
 input/regression/part-combine.ly       |  1 +
 scm/part-combiner.scm                  | 11 +++++++++--
 4 files changed, 31 insertions(+), 2 deletions(-)
 create mode 100644 input/regression/part-combine-cross.ly

diff --git a/ChangeLog b/ChangeLog
index e0a20fd85a..09041daa4c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2004-03-31  Han-Wen Nienhuys   <hanwen@xs4all.nl>
 
+	* scm/part-combiner.scm (determine-split-list): split for voice
+	crossings
+
+	* input/regression/part-combine-cross.ly: new file.
+
 	* scm/part-combiner.scm (make-part-combine-music): don't do
 	relative inside partcombine arguments.
 
diff --git a/input/regression/part-combine-cross.ly b/input/regression/part-combine-cross.ly
new file mode 100644
index 0000000000..5565a88992
--- /dev/null
+++ b/input/regression/part-combine-cross.ly
@@ -0,0 +1,16 @@
+
+\header {
+    texidoc ="The part combiner stays apart for crossing voices.
+"
+    }
+
+\version "2.1.36"
+
+vone = \notes \relative a' { g4 g f f e e d d }
+vtwo = \notes \relative a' { e4 e f f g g a a }
+
+\score {
+   \partcombine \vone \vtwo
+   \paper { raggedright = ##t } 
+}
+ 
diff --git a/input/regression/part-combine.ly b/input/regression/part-combine.ly
index fb2820dcb4..383c2c9158 100644
--- a/input/regression/part-combine.ly
+++ b/input/regression/part-combine.ly
@@ -21,5 +21,6 @@ vtwo = \notes \relative a' { f2 f4 f f2 g4 g c, f f  f  f f~ f ~ f
 
 \score {
    \partcombine \vone \vtwo
+   \paper { raggedright = ##t } 
 }
  
diff --git a/scm/part-combiner.scm b/scm/part-combiner.scm
index 99c28ea577..c7cca04df9 100644
--- a/scm/part-combiner.scm
+++ b/scm/part-combiner.scm
@@ -264,8 +264,15 @@ Only set if not set previously.
 		 (if (and (= (length pitches1) (length pitches2)))
 		     (if (and (pair? pitches1)
 			      (pair? pitches2)
-			      (< chord-threshold (ly:pitch-steps
-						  (ly:pitch-diff (car pitches1) (car pitches2)))))
+			      (or
+			       (< chord-threshold (ly:pitch-steps
+						   (ly:pitch-diff (car pitches1)
+								  (car pitches2))))
+
+			       ;; voice crossings:
+			       (> 0 (ly:pitch-steps (ly:pitch-diff (car pitches1)
+								   (car pitches2))))
+			       ))
 			 (put 'apart)
 			 ;; copy previous split state from spanner state
 			 (begin
-- 
2.39.5