Fix #362.

[lilypond.git] / lily / stencil.cc

diff --git a/lily/stencil.cc b/lily/stencil.cc
index 12bbf4ea128f0f573a41ae1e9b7d1f6cabd5fbe4..3b92b558007aa71ba77383e83cb709ddc1ce049f 100644 (file)
--- a/lily/stencil.cc
+++ b/lily/stencil.cc
@@ -76,14 +76,17 @@ Stencil::extent_box () const
 void
 Stencil::rotate (Real a, Offset off)
 {
-  rotate_degrees (a *180/M_PI, off); 
+  rotate_degrees (a * 180/M_PI, off); 
 }
 
 /*
-  Rotate this stencil around the point [x, y]
+  Rotate this stencil around the point RELATIVE_OFF.
+
+  RELATIVE_OFF is measured in terms of the extent of the stencil, so
+  -1 = LEFT/DOWN edge, 1 = RIGHT/UP edge.
  */
 void
-Stencil::rotate_degrees (Real a, Offset off)
+Stencil::rotate_degrees (Real a, Offset relative_off)
 {
   const Real x_cen = extent (X_AXIS).center ();
   const Real y_cen = extent (Y_AXIS).center ();
@@ -91,8 +94,8 @@ Stencil::rotate_degrees (Real a, Offset off)
   /*
    * Calculate the center of rotation
    */
-  const Real x = x_cen + off[X_AXIS] * x_cen;
-  const Real y = y_cen + off[Y_AXIS] * y_cen;
+  const Real x = x_cen + relative_off[X_AXIS] * x_cen;
+  const Real y = y_cen + relative_off[Y_AXIS] * y_cen;
 
   /*
    * Build scheme expression (processed in stencil-interpret.cc)
@@ -195,7 +198,7 @@ Stencil::add_at_edge (Axis a, Direction d, Stencil const &s, Real padding)
   Real his_extent;
   if (i.is_empty ())
     {
-      programming_error ("Stencil::moved_to_edge: adding empty stencil.");
+      programming_error ("Stencil::add_at_edge: adding empty stencil.");
       his_extent = 0.0;
     }
   else