Flow Field Plotter

streamline generator · svg for pen plotters

Mode

Particles

Count

Flow speed

Trail length

Lifespan

Particles flow through the same field. Colour follows the Color tab (Direction shifts live; Glow suits dark paper). Trails build on screen — Record saves WebM, PNG snapshots the frame. SVG is streamline-only. Draw guides in Streamlines mode first.

Randomize

Padlock a slider to keep it. Categorical locks:

Field source

Image

Upload image…

none

Image scale

Offset X

Offset Y

Drives Image edges (direction) and/or Image density below.

Field

Second field

Field mix

Scale

Octaves

Turbulence

Domain warp

Rotate

Symmetry

Streamlines

Line spacing

Step size

Max length

Min length

Opacity

Density

Contrast

Line spacing above sets the sparse (light) end; contrast pulls the dense (dark) end tighter.

Paper

Margin

PNG export

Save & load

Links & presets store all settings, gradient & guide strokes — not the uploaded image. Presets need browser storage (won't persist in a sandboxed preview).

Ink

Pen

Paper

Pen width

Pen speed

Color

Palette cycles

Pens

Palette applies to Direction / Position / Density. Image uses the photo's own colors.

Line style

Taper amount

Non-uniform profiles render as filled ribbons — SVG becomes fill paths, not strokes. Amount 0 = even width.

drawing…

Lines—

Pen-down—

Est. plot—

Gen—

SVG exports at true millimetre size — drop it straight into your plotter's toolchain.