mrlyfig

• The figure press of Mrly: it does one thing, draw.
• The library is the kit every figure shares; each figure is one binary of the figures crate, and the press turns it into two square pngs, one on the dark ground of the site and one on the light.
• Every figure is hand-authored from a one-line brief tied to its page's mathematics: subject, artist, parameters, palette; the briefs are the FIGURES list in figures/README.md.

KIT

• board the rgba canvas and its anti-aliased primitives: rect, round rect, disc, ring, segment, polyline, triangle, polygon, arc, all signed-distance with a one pixel feather.
• board::Frame the drawing rectangle: inset, cell, unit coordinates, centre, the largest centred square, rows and columns.
• ink the palette of the house, resolved for the theme in press: MRLYFIG_THEME picks the dark ground or the light one, the six inks are blue, orange, yellow, green, pink and indigo, then mix and fade, and Ramp with its heat, fire, diverging and two-tone recipes.
• grid the square lattice: fill a cell, paint the type bytes of a flat design, grow a 0/1 mask by Kronecker substitution, lay a carpet.
• hex the triangle mesh of a hex slice, fitted equilateral into a frame, and the plain hexagon whose triangles always number six times its side squared.
• iso the exposed faces of a cube in isometric, back to front, three tones for the top, the left and the right.
• plot the plain marks: bars, dots, rings, staircases, curves and a bare hairline axis, never a tick and never a label.
• field a scalar field or a sampled function painted through a ramp.
• gif the reel: boards added one by one, indexed exactly against a palette of at most 256 inks with no quantizer, written as a looping GIF89a by an LZW encoder of this file, files/figures/<name>-{dark,light}.gif.

PRESS

• One figure is one binary: figures/src/bin/<name>.rs, autodiscovered by cargo, no list anywhere; the crate is a workspace member and a bare cargo check never touches it.
• Run one with bash scripts/figures.sh <name>, several by naming them, or every figure by passing nothing; the script reads the bin list from cargo metadata and every figure prints twice, once a theme.
• Every figure lands in files/figures/ as <name>-dark.png and <name>-light.png, square, 1024 by 1024, on the ground of its theme, with no text and no wordmark. The art speaks.
• The pngs are CC BY 4.0, the licence beside them in files/figures/LICENSE.md; a single png a lab study draws lives there too under its own name.
• The figures carry private helpers the kit could absorb (a stroked rectangle, a hairline lattice, a hexagon cell reader, an isometric stamp, a frame-mapped scatter); fold one in when a third figure needs it.
• A figure never computes at render: it reads files/figures/data/<name>.json, written once by cargo run --release -p figures --bin <name> -- compute, and the data file is committed beside the code.
• research-integers sweeps the whole ledger in that compute pass and takes about five minutes; every figure then prints in well under a second.