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GIMP Script-Fu Script | 2005-06-30 | 3.1 KB | 88 lines |
- ;;; line-nova.scm for gimp-1.1 -*-scheme-*-
- ;;; Time-stamp: <1998/11/25 13:26:44 narazaki@gimp.org>
- ;;; Author Shuji Narazaki <narazaki@gimp.org>
- ;;; Version 0.7
-
- (define (script-fu-line-nova img drw num-of-lines corn-deg offset variation)
- (let* ((*points* (cons-array (* 3 2) 'double))
- (modulo fmod) ; in R4RS way
- (pi/2 (/ *pi* 2))
- (pi/4 (/ *pi* 4))
- (pi3/4 (* 3 pi/4))
- (pi5/4 (* 5 pi/4))
- (pi3/2 (* 3 pi/2))
- (pi7/4 (* 7 pi/4))
- (2pi (* 2 *pi*))
- (rad/deg (/ 2pi 360))
- (variation/2 (/ variation 2))
- (drw-width (car (gimp-drawable-width drw)))
- (drw-height (car (gimp-drawable-height drw)))
- (drw-offsets (gimp-drawable-offsets drw))
- (old-selection (if (eq? (car (gimp-selection-is-empty img)) TRUE)
- #f
- (car (gimp-selection-save img))))
- (radius (max drw-height drw-width))
- (index 0)
- (dir-deg/line (/ 360 num-of-lines)))
- (define (draw-vector beg-x beg-y direction)
- (define (set-point! index x y)
- (aset *points* (* 2 index) x)
- (aset *points* (+ (* 2 index) 1) y))
- (define (deg->rad rad)
- (* (modulo rad 360) rad/deg))
- (define (set-marginal-point beg-x beg-y direction)
- (let ((dir1 (deg->rad (+ direction corn-deg)))
- (dir2 (deg->rad (- direction corn-deg))))
- (define (aux dir index)
- (set-point! index
- (+ beg-x (* (cos dir) radius))
- (+ beg-y (* (sin dir) radius))))
- (aux dir1 1)
- (aux dir2 2)))
- (let ((dir0 (deg->rad direction))
- (off (+ offset (- (modulo (rand) variation) variation/2))))
- (set-point! 0
- (+ beg-x (* off (cos dir0)))
- (+ beg-y (* off (sin dir0))))
- (set-marginal-point beg-x beg-y direction)
- (gimp-free-select img 6 *points* CHANNEL-OP-ADD
- TRUE ; antialias
- FALSE ; feather
- 0 ; feather radius
- )))
-
- (gimp-image-undo-group-start img)
- (gimp-selection-none img)
- (srand (realtime))
- (while (< index num-of-lines)
- (draw-vector (+ (nth 0 drw-offsets) (/ drw-width 2))
- (+ (nth 1 drw-offsets) (/ drw-height 2))
- (* index dir-deg/line))
- (set! index (+ index 1)))
- (gimp-edit-bucket-fill drw FG-BUCKET-FILL NORMAL-MODE 100 0 FALSE 0 0)
- (if old-selection
- (begin
- (gimp-selection-load old-selection)
- ;; (gimp-image-set-active-layer img drw)
- ;; delete extra channel by Sven Neumann <neumanns@uni-duesseldorf.de>
- (gimp-image-remove-channel img old-selection)))
- (gimp-image-undo-group-end img)
- (gimp-displays-flush)))
-
- (script-fu-register "script-fu-line-nova"
- _"Line _Nova..."
- "Line Nova. Draw lines with Foreground color from the center of image to the edges. 1st undo cancels bucket-fill. 2nd undo gets orignal selection."
- "Shuji Narazaki <narazaki@gimp.org>"
- "Shuji Narazaki"
- "1997,1998"
- ""
- SF-IMAGE "Image" 0
- SF-DRAWABLE "Drawable" 0
- SF-ADJUSTMENT _"Number of lines" '(200 40 1000 1 1 0 1)
- SF-ADJUSTMENT _"Sharpness (degrees)" '(1.0 0.0 10.0 0.1 1 1 1)
- SF-ADJUSTMENT _"Offset radius" '(100 0 2000 1 1 0 1)
- SF-ADJUSTMENT _"Randomness" '(30 0 2000 1 1 0 1))
-
- (script-fu-menu-register "script-fu-line-nova"
- _"<Image>/Script-Fu/Render")
-