6ceaa37ab6
Implements ascii_fx_zone effect that allows applying arbitrary sexp effects to each character cell via cell_effect lambdas. Each cell is rendered as a small image that effects can operate on. Key changes: - New ascii_fx_zone effect with cell_effect parameter for per-cell transforms - Zone context (row, col, lum, sat, hue, etc.) available in cell_effect lambdas - Effects are now loaded explicitly from recipe declarations, not auto-loaded - Added effects_registry to plan for explicit effect dependency tracking - Updated effect definition syntax across all sexp effects - New run_staged.py for executing staged recipes - Example recipes demonstrating alternating rotation and blur/rgb_split patterns Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
23 lines
713 B
Common Lisp
23 lines
713 B
Common Lisp
;; Vignette effect - darkens corners
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(define-effect vignette
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:params (
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(strength :type float :default 0.5 :range [0 1])
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(radius :type int :default 1 :range [0.5 2])
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)
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(let* ((w (width frame))
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(h (height frame))
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(cx (/ w 2))
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(cy (/ h 2))
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(max-dist (* (sqrt (+ (* cx cx) (* cy cy))) radius)))
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(map-pixels frame
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(lambda (x y c)
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(let* ((dx (- x cx))
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(dy (- y cy))
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(dist (sqrt (+ (* dx dx) (* dy dy))))
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(factor (- 1 (* (/ dist max-dist) strength)))
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(factor (clamp factor 0 1)))
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(rgb (* (red c) factor)
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(* (green c) factor)
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(* (blue c) factor)))))))
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