1997-11-24 14:05:25 -08:00
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; Create a 3D sphere with optional shadow
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; The sphere's principle color will be the foreground
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; Parameters:
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; bg-color: background color
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; sphere-color: color of sphere
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; radius: radius of the sphere in pixels
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; light: angle of light source in degrees
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; shadow: whather to create a shadow as well
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2003-07-22 07:24:11 -07:00
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(define (script-fu-sphere radius
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2006-10-15 18:08:54 -07:00
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light
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shadow
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bg-color
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sphere-color)
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(let* (
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(width (* radius 3.75))
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(height (* radius 2.5))
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(img (car (gimp-image-new width height RGB)))
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(drawable (car (gimp-layer-new img width height RGB-IMAGE
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"Sphere Layer" 100 NORMAL-MODE)))
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(radians (/ (* light *pi*) 180))
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(cx (/ width 2))
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(cy (/ height 2))
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(light-x (+ cx (* radius (* 0.6 (cos radians)))))
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(light-y (- cy (* radius (* 0.6 (sin radians)))))
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(light-end-x (+ cx (* radius (cos (+ *pi* radians)))))
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(light-end-y (- cy (* radius (sin (+ *pi* radians)))))
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(offset (* radius 0.1))
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)
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2004-09-23 04:16:23 -07:00
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(gimp-context-push)
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2003-07-22 07:24:11 -07:00
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1999-10-16 17:07:55 -07:00
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(gimp-image-undo-disable img)
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1997-11-24 14:05:25 -08:00
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(gimp-image-add-layer img drawable 0)
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2004-09-22 11:43:09 -07:00
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(gimp-context-set-foreground sphere-color)
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(gimp-context-set-background bg-color)
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2003-10-16 05:47:33 -07:00
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(gimp-edit-fill drawable BACKGROUND-FILL)
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2004-09-22 11:43:09 -07:00
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(gimp-context-set-background '(20 20 20))
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1997-11-24 14:05:25 -08:00
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(if (and
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2006-10-15 18:08:54 -07:00
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(or (and (>= light 45) (<= light 75))
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(and (<= light 135) (>= light 105)))
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(= shadow TRUE))
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(let ((shadow-w (* (* radius 2.5) (cos (+ *pi* radians))))
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(shadow-h (* radius 0.5))
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(shadow-x cx)
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(shadow-y (+ cy (* radius 0.65))))
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(if (< shadow-w 0)
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(begin (set! shadow-x (+ cx shadow-w))
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(set! shadow-w (- shadow-w))))
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2003-07-22 07:24:11 -07:00
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2006-10-15 18:08:54 -07:00
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(gimp-ellipse-select img shadow-x shadow-y shadow-w shadow-h
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CHANNEL-OP-REPLACE TRUE TRUE 7.5)
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(gimp-edit-bucket-fill drawable BG-BUCKET-FILL MULTIPLY-MODE 100 0 FALSE 0 0)))
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2003-07-22 07:24:11 -07:00
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(gimp-ellipse-select img (- cx radius) (- cy radius)
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2006-10-15 18:08:54 -07:00
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(* 2 radius) (* 2 radius) CHANNEL-OP-REPLACE TRUE FALSE 0)
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2003-07-22 07:24:11 -07:00
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2004-01-05 06:35:19 -08:00
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(gimp-edit-blend drawable FG-BG-RGB-MODE NORMAL-MODE
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2006-10-15 18:08:54 -07:00
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GRADIENT-RADIAL 100 offset REPEAT-NONE FALSE
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FALSE 0 0 TRUE
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light-x light-y light-end-x light-end-y)
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2003-07-22 07:24:11 -07:00
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1997-11-24 14:05:25 -08:00
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(gimp-selection-none img)
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1999-10-16 17:07:55 -07:00
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(gimp-image-undo-enable img)
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2004-09-23 04:16:23 -07:00
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(gimp-display-new img)
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2006-10-15 18:08:54 -07:00
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(gimp-context-pop)
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)
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)
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1997-11-24 14:05:25 -08:00
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(script-fu-register "script-fu-sphere"
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2006-10-15 18:08:54 -07:00
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_"_Sphere..."
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_"Create a simple sphere with a drop shadow"
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"Spencer Kimball"
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"Spencer Kimball"
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"1996"
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""
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SF-ADJUSTMENT _"Radius (pixels)" '(100 5 500 1 10 0 1)
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SF-ADJUSTMENT _"Lighting (degrees)" '(45 0 360 1 10 0 0)
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SF-TOGGLE _"Shadow" TRUE
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2006-10-20 10:55:14 -07:00
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SF-COLOR _"Background color" "white"
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SF-COLOR _"Sphere color" "red"
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2006-10-15 18:08:54 -07:00
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)
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2004-11-18 14:44:28 -08:00
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(script-fu-menu-register "script-fu-sphere"
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2006-10-15 18:08:54 -07:00
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"<Toolbox>/Xtns/Misc")
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