From: Joe Neeman <joeneeman@gmail.com>
Date: Tue, 18 Dec 2007 01:15:56 +0000 (+1100)
Subject: Avoid NaN with springs of zero length.
X-Git-Tag: release/2.11.38-1~27
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=7802d89e1fbb1310b2801502293ece228b5dda66;p=lilypond.git

Avoid NaN with springs of zero length.
---

diff --git a/lily/simple-spacer.cc b/lily/simple-spacer.cc
index 9129361cbd..4da2ac9a87 100644
--- a/lily/simple-spacer.cc
+++ b/lily/simple-spacer.cc
@@ -105,7 +105,12 @@ Simple_spacer::add_rod (int l, int r, Real dist)
       Real spring_dist = range_ideal_len (l, r);
       if (spring_dist < dist)
 	for (int i = l; i < r; i++)
-	  springs_[i].set_distance (springs_[i].distance () * dist / spring_dist);
+	  {
+	    if (spring_dist)
+	      springs_[i].set_distance (springs_[i].distance () * dist / spring_dist);
+	    else
+	      springs_[i].set_distance (dist / (r - l));
+	  }
 
       return;
     }