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ripply-anim.scm
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2009-12-15
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; "Rippling Image" animation generator (ripply-anim.scm)
; Adam D. Moss (adam@foxbox.org)
; 97/05/18
;
; Designed to be used in conjunction with a plugin capable
; of saving animations (i.e. the GIF plugin).
;
(define (script-fu-ripply-anim img drawable displacement num-frames edge-type)
(define (copy-layer-ripple dest-image dest-drawable source-image source-drawable)
(gimp-selection-all dest-image)
(gimp-edit-clear dest-drawable)
(gimp-selection-none dest-image)
(gimp-selection-all source-image)
(gimp-edit-copy source-drawable)
(gimp-selection-none source-image)
(let ((floating-sel (car (gimp-edit-paste dest-drawable FALSE))))
(gimp-floating-sel-anchor (car (gimp-edit-paste dest-drawable FALSE)))
)
)
(let* (
(width (car (gimp-drawable-width drawable)))
(height (car (gimp-drawable-height drawable)))
(ripple-image (car (gimp-image-new width height GRAY)))
(ripple-layer (car (gimp-layer-new ripple-image width height GRAY-IMAGE "Ripple Texture" 100 NORMAL-MODE)))
(rippletiled-ret 0)
(rippletiled-image 0)
(rippletiled-layer 0)
(remaining-frames 0)
(xpos 0)
(ypos 0)
(xoffset 0)
(yoffset 0)
(dup-image 0)
(layer-name 0)
(this-image 0)
(this-layer 0)
(dup-layer 0)
)
(gimp-context-push)
; this script generates its own displacement map
(gimp-image-undo-disable ripple-image)
(gimp-context-set-background '(127 127 127))
(gimp-image-add-layer ripple-image ripple-layer 0)
(gimp-edit-fill ripple-layer BACKGROUND-FILL)
(plug-in-noisify RUN-NONINTERACTIVE ripple-image ripple-layer FALSE 1.0 1.0 1.0 0.0)
; tile noise
(set! rippletiled-ret (plug-in-tile RUN-NONINTERACTIVE ripple-image ripple-layer (* width 3) (* height 3) TRUE))
(gimp-image-undo-enable ripple-image)
(gimp-image-delete ripple-image)
(set! rippletiled-image (car rippletiled-ret))
(set! rippletiled-layer (cadr rippletiled-ret))
(gimp-image-undo-disable rippletiled-image)
; process tiled noise into usable displacement map
(plug-in-gauss-iir RUN-NONINTERACTIVE rippletiled-image rippletiled-layer 35 TRUE TRUE)
(gimp-equalize rippletiled-layer TRUE)
(plug-in-gauss-rle RUN-NONINTERACTIVE rippletiled-image rippletiled-layer 5 TRUE TRUE)
(gimp-equalize rippletiled-layer TRUE)
; displacement map is now in rippletiled-layer of rippletiled-image
; loop through the desired frames
(set! remaining-frames num-frames)
(set! xpos (/ width 2))
(set! ypos (/ height 2))
(set! xoffset (/ width num-frames))
(set! yoffset (/ height num-frames))
(let* ((out-imagestack (car (gimp-image-new width height RGB))))
(gimp-image-undo-disable out-imagestack)
(while (> remaining-frames 0)
(set! dup-image (car (gimp-image-duplicate rippletiled-image)))
(gimp-image-undo-disable dup-image)
(gimp-image-crop dup-image width height xpos ypos)
(set! layer-name (string-append "Frame "
(number->string (- num-frames remaining-frames) 10)
" (replace)"))
(set! this-layer (car (gimp-layer-new out-imagestack
width height RGB
layer-name 100 NORMAL-MODE)))
(gimp-image-add-layer out-imagestack this-layer 0)
(copy-layer-ripple out-imagestack this-layer img drawable)
(set! dup-layer (car (gimp-image-get-active-layer dup-image)))
(plug-in-displace RUN-NONINTERACTIVE out-imagestack this-layer
displacement displacement
TRUE TRUE dup-layer dup-layer edge-type)
(gimp-image-undo-enable dup-image)
(gimp-image-delete dup-image)
(set! remaining-frames (- remaining-frames 1))
(set! xpos (+ xoffset xpos))
(set! ypos (+ yoffset ypos))
)
(gimp-image-undo-enable rippletiled-image)
(gimp-image-delete rippletiled-image)
(gimp-image-undo-enable out-imagestack)
(gimp-display-new out-imagestack))
(gimp-context-pop)
)
)
(script-fu-register "script-fu-ripply-anim"
_"_Rippling..."
_"Create a multi-layer image by adding a ripple effect to the current image"
"Adam D. Moss (adam@foxbox.org)"
"Adam D. Moss"
"1997"
"RGB* GRAY*"
SF-IMAGE "Image to animage" 0
SF-DRAWABLE "Drawable to animate" 0
SF-ADJUSTMENT _"Rippling strength" '(3 0 256 1 10 1 0)
SF-ADJUSTMENT _"Number of frames" '(15 0 256 1 10 0 1)
SF-OPTION _"Edge behavior" '(_"Wrap" _"Smear" _"Black")
)
(script-fu-menu-register "script-fu-ripply-anim"
"<Image>/Filters/Animation/Animators")