;; Ripple effect - concentric wave distortion from center
;; Usage: python3 plan.py effects/ripple.sexp -p amplitude=20 -p frequency=6 | python3 execute.py - -d . -o output.mp4
;;
;; Parameters:
;;   amplitude: ripple strength in pixels (5 to 50, default: 20)
;;   frequency: number of ripples (1 to 20, default: 6)

(recipe "ripple"
  :version "1.0"
  :encoding (:codec "libx264" :crf 20 :preset "medium" :audio-codec "aac" :fps 30)

  (effect ripple :path "sexp_effects/effects/ripple.sexp")

  ;; Default parameters (overridden by -p amplitude=N -p frequency=N)
  (def amplitude 20)
  (def frequency 6)

  (def video (source :path "monday.webm"))
  (def clip (-> video (segment :start 0 :duration 10)))
  (def result (-> clip (effect ripple :amplitude amplitude :frequency frequency)))
  result)