Give every point of the plane an arrow — a direction to push — then drop thousands of particles and let them RIDE the arrows, leaving trails. Where the arrows come from Perlin noise, the trails braid into silk, smoke, and wind. It’s the signature look of a decade of generative art. Slide the field’s turbulence and watch the current shift.
A flow (vector) field assigns a direction to every point; particles are integrated along it, p ← p + v(p)·dt, tracing streamlines. When the angle field is driven by smooth noise, neighbouring particles follow nearly-parallel paths and braid into coherent flow — the basis of countless ‘silk/wind’ generative pieces. The particle’s displacement is, by construction, aligned with the local field vector. A fail-loud self-check throws unless a stepped particle moves in the direction of the field (positive dot product). ◆ real generative technique, node-verified.
A live particle system with trails; the field is a simple noise-driven angle map. The advection rule (move along the local vector) is exact; the specific imagery depends on seeding and step size, which are art choices.