+ /*
+ Compensate for rounding error which may occur when a chord
+ reaches the center line, resulting in an extra squiggle
+ being added to the arpeggio stencil. This value is appreciably
+ larger than the rounding error, which is in the region of 1e-16
+ for a global-staff-size of 20, but small enough that it does not
+ interfere with smaller staff sizes.
+ */
+ const Real epsilon = 1e-3;
+