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>
30 lines
1.0 KiB
Common Lisp
30 lines
1.0 KiB
Common Lisp
;; CRT effect - old monitor simulation
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(define-effect crt
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:params (
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(line_spacing :type int :default 2 :range [1 10])
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(line_opacity :type float :default 0.3 :range [0 1])
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(vignette_amount :type float :default 0.2)
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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)))))
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(map-pixels frame
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(lambda (x y c)
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(let* (;; Scanline darkening
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(scanline-factor (if (= 0 (mod y line_spacing))
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(- 1 line_opacity)
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1))
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;; Vignette
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(dx (- x cx))
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(dy (- y cy))
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(dist (sqrt (+ (* dx dx) (* dy dy))))
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(vignette-factor (- 1 (* (/ dist max-dist) vignette_amount)))
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;; Combined
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(factor (* scanline-factor vignette-factor)))
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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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