+ /*
+ The thickness of the horizontal lines of the flexa shape
+ should be equal to that of the horizontal lines of the
+ neomensural brevis note head (see mf/parmesan-heads.mf).
+ */
+ Real const horizontal_line_thickness = staff_space * 0.35;
+
+ // URGH! vertical_line_thickness is adjustable (via thickness
+ // property), while horizontal_line_thickness is constant.
+ // Maybe both should be adjustable independently?
+
+ Real height = staff_space - horizontal_line_thickness;
+