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feat(hero): seeded RNG, 2D simplex, curl-noise flow field #27

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patman commented 2026-06-12 19:45:52 +00:00
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PR 2/7 in the hero-toolpaths stack (prev: hero-scaffold #26, next: hero-racers). mulberry32 PRNG and a seed-shuffled Gustavson 2D simplex, composed into a divergence-free curl-noise field (Bridson et al. 2007, cited in doc comments). Heading-only sampling via central differences — allocation-free, four noise evals per sample. Per-head domain offsets give similar-but-different streamlines. Review focus: simplex correctness against the cited reference; the curl/atan2 derivation comment in FlowField.heading.

PR 2/7 in the hero-toolpaths stack (prev: hero-scaffold #26, next: hero-racers). mulberry32 PRNG and a seed-shuffled Gustavson 2D simplex, composed into a divergence-free curl-noise field (Bridson et al. 2007, cited in doc comments). Heading-only sampling via central differences — allocation-free, four noise evals per sample. Per-head domain offsets give similar-but-different streamlines. Review focus: simplex correctness against the cited reference; the curl/atan2 derivation comment in FlowField.heading.
feat(hero): seeded RNG, 2D simplex, curl-noise flow field
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39c13976c0 
mulberry32 PRNG and a seed-shuffled Gustavson 2D simplex, composed into
a divergence-free curl-noise field (Bridson et al. 2007). Heading-only
sampling via central differences — allocation-free, four noise evals per
sample. Per-head domain offsets give similar-but-different streamlines.
patman force-pushed patman/hero-field from 39c13976c0
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2026-06-12 21:12:27 +00:00 Compare
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