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>
15 lines
537 B
Common Lisp
15 lines
537 B
Common Lisp
;; Scanlines effect - VHS-style horizontal line shifting
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(define-effect scanlines
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:params (
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(amplitude :type int :default 10 :range [0 100])
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(frequency :type int :default 10 :range [1 100])
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(randomness :type float :default 0.5 :range [0 1])
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)
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(map-rows frame
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(lambda (y row)
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(let* ((sine-shift (* amplitude (sin (/ (* y 6.28) (max 1 frequency)))))
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(rand-shift (random (- amplitude) amplitude))
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(shift (floor (lerp sine-shift rand-shift randomness))))
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(roll row shift 0)))))
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