(cons (- out-radius) out-radius)
(cons (- out-radius) out-radius))))
+(define-public (make-ellipse-stencil x-radius y-radius thickness fill)
+ "Make an ellipse of x radius @var{x-radius}, y radius @code{y-radius},
+ and thickness @var{thickness} with fill defined by @code{fill}."
+ (let*
+ ((x-out-radius (+ x-radius (/ thickness 2.0)))
+ (y-out-radius (+ y-radius (/ thickness 2.0))) )
+
+ (ly:make-stencil
+ (list 'ellipse x-radius y-radius thickness fill)
+ (cons (- x-out-radius) x-out-radius)
+ (cons (- y-out-radius) y-out-radius))))
+
(define-public (box-grob-stencil grob)
"Make a box of exactly the extents of the grob. The box precisely
encloses the contents.
(define-public (circle-stencil stencil thickness padding)
"Add a circle around STENCIL, producing a new stencil."
- (let* ((x-ext (ly:stencil-extent stencil 0))
- (y-ext (ly:stencil-extent stencil 1))
- (diameter (max (- (cdr x-ext) (car x-ext))
- (- (cdr y-ext) (car y-ext))))
+ (let* ((x-ext (ly:stencil-extent stencil X))
+ (y-ext (ly:stencil-extent stencil Y))
+ (diameter (max (interval-length x-ext)
+ (interval-length y-ext)))
(radius (+ (/ diameter 2) padding thickness))
(circle (make-circle-stencil radius thickness #f)))
(interval-center x-ext)
(interval-center y-ext))))))
+(define-public (ellipse-stencil stencil thickness x-padding y-padding)
+ "Add an ellipse around STENCIL, padded by the padding pair,
+ producing a new stencil."
+ (let* ((x-ext (ly:stencil-extent stencil X))
+ (y-ext (ly:stencil-extent stencil Y))
+ (x-length (+ (interval-length x-ext) x-padding thickness))
+ (y-length (+ (interval-length y-ext) y-padding thickness))
+ ;(aspect-ratio (/ x-length y-length))
+ (x-radius (* 0.707 x-length) )
+ (y-radius (* 0.707 y-length) )
+ ;(diameter (max (- (cdr x-ext) (car x-ext))
+ ; (- (cdr y-ext) (car y-ext))))
+ ;(radius (+ (/ diameter 2) padding thickness))
+ (ellipse (make-ellipse-stencil x-radius y-radius thickness #f)))
+
+ (ly:stencil-add
+ stencil
+ (ly:stencil-translate ellipse
+ (cons
+ (interval-center x-ext)
+ (interval-center y-ext))))))
+
(define-public (rounded-box-stencil stencil thickness padding blot)
"Add a rounded box around STENCIL, producing a new stencil."