mirror of https://github.com/GNOME/gimp.git
64 lines
2.5 KiB
Scheme
64 lines
2.5 KiB
Scheme
; Create a 3D sphere with optional shadow
|
|
; The sphere's principle color will be the foreground
|
|
; Parameters:
|
|
; bg-color: background color
|
|
; sphere-color: color of sphere
|
|
; radius: radius of the sphere in pixels
|
|
; light: angle of light source in degrees
|
|
; shadow: whather to create a shadow as well
|
|
|
|
(define (script-fu-sphere radius light shadow bg-color sphere-color)
|
|
(let* ((width (* radius 3.75))
|
|
(height (* radius 2.5))
|
|
(img (car (gimp-image-new width height RGB)))
|
|
(drawable (car (gimp-layer-new img width height RGB_IMAGE "Sphere Layer" 100 NORMAL)))
|
|
(radians (/ (* light *pi*) 180))
|
|
(cx (/ width 2))
|
|
(cy (/ height 2))
|
|
(light-x (+ cx (* radius (* 0.6 (cos radians)))))
|
|
(light-y (- cy (* radius (* 0.6 (sin radians)))))
|
|
(light-end-x (+ cx (* radius (cos (+ *pi* radians)))))
|
|
(light-end-y (- cy (* radius (sin (+ *pi* radians)))))
|
|
(offset (* radius 0.1))
|
|
(old-fg (car (gimp-palette-get-foreground)))
|
|
(old-bg (car (gimp-palette-get-background))))
|
|
(gimp-image-disable-undo img)
|
|
(gimp-image-add-layer img drawable 0)
|
|
(gimp-palette-set-foreground sphere-color)
|
|
(gimp-palette-set-background bg-color)
|
|
(gimp-edit-fill drawable)
|
|
(gimp-palette-set-background '(20 20 20))
|
|
(if (and
|
|
(or (and (>= light 45) (<= light 75)) (and (<= light 135) (>= light 105)))
|
|
(= shadow TRUE))
|
|
(let ((shadow-w (* (* radius 2.5) (cos (+ *pi* radians))))
|
|
(shadow-h (* radius 0.5))
|
|
(shadow-x cx)
|
|
(shadow-y (+ cy (* radius 0.65))))
|
|
(if (< shadow-w 0)
|
|
(prog1 (set! shadow-x (+ cx shadow-w))
|
|
(set! shadow-w (- shadow-w))))
|
|
(gimp-ellipse-select img shadow-x shadow-y shadow-w shadow-h REPLACE TRUE TRUE 7.5)
|
|
(gimp-bucket-fill drawable BG-BUCKET-FILL MULTIPLY 100 0 FALSE 0 0)))
|
|
(gimp-ellipse-select img (- cx radius) (- cy radius) (* 2 radius) (* 2 radius) REPLACE TRUE FALSE 0)
|
|
(gimp-blend drawable FG-BG-RGB NORMAL RADIAL 100 offset REPEAT-NONE
|
|
FALSE 0 0 light-x light-y light-end-x light-end-y)
|
|
(gimp-selection-none img)
|
|
(gimp-palette-set-background old-bg)
|
|
(gimp-palette-set-foreground old-fg)
|
|
(gimp-image-enable-undo img)
|
|
(gimp-display-new img)))
|
|
|
|
(script-fu-register "script-fu-sphere"
|
|
"<Toolbox>/Xtns/Script-Fu/Misc/Sphere"
|
|
"Simple spheres with drop shadows"
|
|
"Spencer Kimball"
|
|
"Spencer Kimball"
|
|
"1996"
|
|
""
|
|
SF-VALUE "Radius (in pixels)" "100"
|
|
SF-VALUE "Lighting (degrees)" "45"
|
|
SF-TOGGLE "Shadow?" TRUE
|
|
SF-COLOR "Background Color" '(255 255 255)
|
|
SF-COLOR "Sphere Color" '(255 0 0))
|