;; Fisheye effect - barrel/pincushion lens distortion
(require-primitives "geometry" "image")

(define-effect fisheye
  :params (
    (strength :type float :default 0.3 :range [-1 1])
    (center_x :type float :default 0.5 :range [0 1])
    (center_y :type float :default 0.5 :range [0 1])
    (zoom_correct :type bool :default true)
  )
  (let* ((w (image:width frame))
         (h (image:height frame))
         (cx (* w center_x))
         (cy (* h center_y))
         (coords (geometry:fisheye-coords w h strength cx cy zoom_correct)))
    (geometry:remap frame (geometry:coords-x coords) (geometry:coords-y coords))))