406cc7c0c7
Add S-expression based video effects pipeline with modular effect definitions, constructs, and recipe files. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
16 lines
608 B
Common Lisp
16 lines
608 B
Common Lisp
;; Swirl effect - spiral vortex distortion
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;; @param strength float [-10, 10] default 1
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;; @param radius float [0.1, 2] default 0.5
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;; @param center_x float [0, 1] default 0.5
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;; @param center_y float [0, 1] default 0.5
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;; @param falloff string default "quadratic"
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(define-effect swirl
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((strength 1) (radius 0.5) (center_x 0.5) (center_y 0.5) (falloff "quadratic"))
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(let* ((w (width frame))
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(h (height frame))
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(cx (* w center_x))
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(cy (* h center_y))
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(coords (swirl-displace w h strength radius cx cy falloff)))
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(remap frame (coords-x coords) (coords-y coords))))
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