; The GIMP -- an image manipulation program
; Copyright (C) 1995 Spencer Kimball and Peter Mattis
; 
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.  
; 
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; 
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;
;
; $Id: dlspin.scm,v 1.1 1998/01/04 10:29:06 dl Exp $
;
; Makes a copy of your image and creates an animation of the active layer
; The animation may be saved with the gif-plug-in. 

(define (script-fu-spinanim img 
			    drawable
			    type
			    num-frames
			    phase)
  (let* ((num-frames (max 1 num-frames))
	 (remaining-frames num-frames)
	 (phaseshift (/ 360 num-frames))
         (image (car (gimp-channel-ops-duplicate img))))
   
  (gimp-image-disable-undo image)
  
  (set! source-layer (car (gimp-image-get-active-layer image)))
  
  (while (> remaining-frames 0)
         (set! anim-layer (car (gimp-layer-copy source-layer TRUE)))
         (gimp-layer-set-preserve-trans anim-layer FALSE)
	 (gimp-image-add-layer image anim-layer -1)
	 (set! layer-name (string-append "Frame " 
					 (number->string
					  (- (+ num-frames 1) 
					     remaining-frames) 
					  10)))
	 (gimp-layer-set-name anim-layer layer-name)
	 
	 (plug-in-map-object 1
			     image
			     anim-layer
			     type
			     0.5 0.5 2.0  ; viewpoint
			     0.5 0.5 0.0  ; position
			     1.0 0.0 0.0  ; firstaxis
			     0.0 1.0 0.0  ; second axis
			     0.0 phase 0.0 ; alpha,beta,gamma
			     0 '(1 1 1)  ; light type and color
			     -0.5 -0.5 2.0 ; light pos
			     -1.0 -1.0 1.0 ; light direction
			     0.6 1.0 0.5 0.4 10.0 ; material 
			     TRUE FALSE FALSE TRUE
			     0.5 ; radius
	  )
	 (set! remaining-frames (- remaining-frames 1))
	 (set! phase (- phase phaseshift)))

  (gimp-image-remove-layer image source-layer)

  (gimp-image-enable-undo image)
  (gimp-display-new image)))

(script-fu-register "script-fu-spinanim" 
		    "<Image>/Script-Fu/Animators/Spin"
		    "Animates an image by mapping it onto a rotating sphere or plane"
		    "Scott Goehring (scott@poverty.bloomington.in.us) and Laurent Demailly (L@demailly.com)"
		    "Scott Goehring + Laurent Demailly"
		    "11/9/97"
		    "RGB RGBA GRAY GRAYA"
		    SF-IMAGE "Image" 0
		    SF-DRAWABLE "Drawable" 0
		    SF-TOGGLE "Sphere(1) or Plane(0)" 1
		    SF-VALUE "Number of Frames" "12"
		    SF-VALUE "Initial phase (deg)" "5"
		    )