Generative Geometry

Perlin Flow-Field

100 peach-gold particles stream along a value-noise flow field on dark charcoal; cursor deflects nearby particles within a 120px radius.

canvasmedium complexitymoderate motionpointer

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Live demo — the real component, running in a sandbox. One self-contained HTML file, zero dependencies. Open it on the canvas →

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When to use it

Dark-mode hero backgrounds, generative art demos, ambient looping canvases where subtle interactivity rewards exploration.

When not to

Light backgrounds (hardcoded dark charcoal). Contexts requiring legible text overlays — trails accumulate over content.

Working with an AI agent

Every component ships agent-ready metadata. An example instruction for this one:

Change particle count from N=100 to 200, shift hue range from 350–410 to warm amber (30–60), and increase deflection radius from 120 to 180. Theme: dark tokens live in :root, the light variant in :root[data-theme="light"]; ?theme=light or a {type:'forever:theme'} postMessage switches at runtime.

Safe to edit

particle count (N=100)
hue range (h: Math.random()*60+350)
trail fade opacity (rgba(6,10,18,0.06))
flow speed (1.6 multiplier)
cursor deflection radius (120)
theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

DPR-aware canvas sizing
visibilitychange pause
reduced-motion static pre-render fallback (60 frames)
theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)

Known limitations

Value-noise function is a sine approximation — lacks true Perlin coherence at large scales
Background color hardcoded in both CSS and canvas fill — must update both to change theme
No touch pointer support beyond pointermove (works but no explicit touch handler)

flow-fieldparticlesgenerativecanvasnoisepointerambient

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