Squashed 'test/' content from commit f2edc20

git-subtree-dir: test
git-subtree-split: f2edc20cba865a6ef67ca807c2ed6cee8e6c2836

sexp_effects/effects/fisheye.sexp

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+;; 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))))