;;;;
;;;; source file of the GNU LilyPond music typesetter
;;;;
-;;;; (c) 2003--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+;;;; (c) 2003--2006 Han-Wen Nienhuys <hanwen@cs.uu.nl>
(define-public (stack-stencils axis dir padding stils)
"Stack stencils STILS in direction AXIS, DIR, using PADDING."
"Make a filled box."
(ly:make-stencil
- (list 'filledbox (- (car xext)) (cdr xext)
- (- (car yext)) (cdr yext))
+ (list 'round-filled-box (- (car xext)) (cdr xext)
+ (- (car yext)) (cdr yext) 0.0)
xext yext))
(define-public (make-circle-stencil radius thickness fill)
(c `(white-text ,(* 2 scale) ,text)))
;;urg -- extent is not from ps font, but we hope it's close
(ly:make-stencil c (car b) (cdr b))))
+
+(define-public (dimension-arrows destination)
+ "Draw twosided arrow from here to @var{destination}"
+
+ (let*
+ ((e_x 1+0i)
+ (e_y 0+1i)
+ (rotate (lambda (z ang)
+ (* (make-polar 1 ang)
+ z)))
+ (complex-to-offset (lambda (z)
+ (list (real-part z) (imag-part z))))
+
+ (z-dest (+ (* e_x (car destination)) (* e_y (cdr destination))))
+ (e_z (/ z-dest (magnitude z-dest)))
+ (triangle-points '(-1+0.25i
+ 0
+ -1-0.25i))
+ (p1s (map (lambda (z)
+ (+ z-dest (rotate z (angle z-dest))))
+ triangle-points))
+ (p2s (map (lambda (z)
+ (rotate z (angle (- z-dest))))
+ triangle-points))
+ (null (cons 0 0))
+ (arrow-1
+ (ly:make-stencil
+ `(polygon (quote ,(concatenate (map complex-to-offset p1s)))
+ 0.0
+ #t) null null))
+ (arrow-2
+ (ly:make-stencil
+ `(polygon (quote ,(concatenate (map complex-to-offset p2s)))
+ 0.0
+ #t) null null ) )
+ (thickness 0.1)
+ (shorten-line 0.5)
+ (start (complex-to-offset (/ (* e_z shorten-line) 2)))
+ (end (complex-to-offset (- z-dest (/ (* e_z shorten-line) 2))))
+
+ (line (ly:make-stencil
+ `(draw-line ,thickness
+ ,(car start) ,(cadr start)
+ ,(car end) ,(cadr end)
+ )
+ (cons (min 0 (car destination))
+ (min 0 (cdr destination)))
+ (cons (max 0 (car destination))
+ (max 0 (cdr destination)))))
+
+ (result (ly:stencil-add arrow-2 arrow-1 line)))
+
+
+ result))