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Merges full history from art-dag/mono.git into the monorepo under the artdag/ directory. Contains: core (DAG engine), l1 (Celery rendering server), l2 (ActivityPub registry), common (shared templates/middleware), client (CLI), test (e2e). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> git-subtree-dir: artdag git-subtree-mainline:1a179de547git-subtree-split:4c2e716558
35 lines
1.1 KiB
Common Lisp
35 lines
1.1 KiB
Common Lisp
;; Film grain effect using xector operations
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;; Demonstrates random xectors and mixing scalar/xector math
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(require-primitives "xector")
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(define-effect xector_grain
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:params (
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(intensity :type float :default 0.2 :range [0 1] :desc "Grain intensity")
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(colored :type bool :default false :desc "Use colored grain")
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)
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(let* (
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;; Extract channels
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(r (red frame))
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(g (green frame))
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(b (blue frame))
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;; Generate noise xector(s)
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;; randn-x generates normal distribution noise
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(grain-amount (* intensity 50)))
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(if colored
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;; Colored grain: different noise per channel
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(let* ((nr (randn-x frame 0 grain-amount))
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(ng (randn-x frame 0 grain-amount))
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(nb (randn-x frame 0 grain-amount)))
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(rgb (αclamp (α+ r nr) 0 255)
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(αclamp (α+ g ng) 0 255)
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(αclamp (α+ b nb) 0 255)))
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;; Monochrome grain: same noise for all channels
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(let ((n (randn-x frame 0 grain-amount)))
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(rgb (αclamp (α+ r n) 0 255)
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(αclamp (α+ g n) 0 255)
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(αclamp (α+ b n) 0 255))))))
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