406cc7c0c7
Add S-expression based video effects pipeline with modular effect definitions, constructs, and recipe files. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
19 lines
637 B
Common Lisp
19 lines
637 B
Common Lisp
;; Trails effect - persistent motion trails
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;; @param persistence float [0, 0.99] default 0.8
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(define-effect trails
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((persistence 0.8))
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(let* ((buffer (state-get 'buffer nil))
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(current frame))
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(if (= buffer nil)
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(begin
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(state-set 'buffer (copy frame))
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frame)
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(let* ((faded (blend-images buffer
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(make-image (width frame) (height frame) (list 0 0 0))
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(- 1 persistence)))
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(result (blend-mode faded current "lighten")))
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(begin
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(state-set 'buffer result)
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result)))))
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