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>
13 lines
365 B
Common Lisp
13 lines
365 B
Common Lisp
;; Posterize effect - reduces color levels
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(define-effect posterize
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:params (
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(levels :type int :default 8 :range [2 32])
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)
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(let ((step (floor (/ 256 levels))))
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(map-pixels frame
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(lambda (x y c)
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(rgb (* (floor (/ (red c) step)) step)
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(* (floor (/ (green c) step)) step)
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(* (floor (/ (blue c) step)) step))))))
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