Acknowledgements

Before a line of this was written, we read the terminal-plotting field across five language ecosystems. The names below are not a courtesy list. Each project taught this one something specific, and the line says what it was.

Algorithms#

• Justin Talbot, Sharon Lin, Pat Hanrahan — "An Extension of Wilkinson's Algorithm for Positioning Tick Labels on Axes" (IEEE InfoVis 2010, vis.stanford.edu/papers/tick-labels). Our axis ticks are this algorithm, built on Leland Wilkinson's original labeling work and his The Grammar of Graphics (Springer, 2005) — the book behind our whole marks-and-scales vocabulary.
• Jack Bresenham — the line rasterization algorithm (IBM Systems Journal, 1965) running inside every polyline we draw.
• You-Dong Liang and Brian Barsky — the parametric clipping (1984) that lets our surface promise "drawing never fails".
• The Unicode Consortium's Braille Patterns block (U+2800–U+28FF), the quiet workhorse of sub-cell terminal graphics.
• Daniel Hepper's font8x8 (public domain, after Marcel Sondaar and the IBM PC BIOS fonts) — the 8×8 bitmap font baked into the pixel feature so in-panel text can render without a font stack.
• DEC's sixel format (VT340, 1987) and kitty's graphics protocol (Kovid Goyal) — the two ends of the terminal-image lineage our pixel encoders speak, with the transparency-by-omission trick (P2=1) learned from how notcurses and chafa handle backgrounds.

Terminal plotting — the tradition we join#

• UnicodePlots.jl (Julia) — the most complete terminal plotting library anywhere, and our architectural north star. Its canvas family, its text-and-pixels-share-one-grid rule, and its demonstration that many plot types reduce to a few raster primitives shaped our Surface and Charset directly. We studied its source line by line.
• drawille — the original braille canvas; every braille chart in every language descends from it.
• textplots (Rust) — braille plotting in Rust before us, and the source of one idea we adopted whole: sampling a function at raster resolution.
• asciigraph (Go) and rasciigraph (Rust) — the box-drawing line-chart lineage, the NaN-as-gap convention, and the lesson that the label gutter must be measured, never fixed.
• asciichart (JavaScript) — the famously elegant ~100-line ╭╮╰╯ renderer, ported to a dozen languages; a planned line style here.
• plotext (Python) — proof of how much a terminal plotting library can cover, and an honest study in the costs of global state.
• YouPlot (Ruby) and ttyplot (C) — the command-line and streaming UX our future CLI will learn from.
• gnuplot — plotting in terminals since 1986; its dumb and block terminals are the ancestors of this whole field.
• ntcharts (Go) and Rich / Textualize (Python) — the render-to-a-string, never-own-the-terminal principle we hold as a core value; Rich's maintainer stated it as policy, ntcharts proved it in practice.
• lowcharts (Rust) — the two-phase fix-bounds-then-bin aggregation shape our statistics layer builds on.

API design — the grammars we learned from#

• d3 — the scale abstraction (domain → range, nice, ticks, invert) is the best-designed scale API anywhere; ours follows its contract.
• Observable Plot — the proof that a small orthogonal basis (marks × scales × transforms × facets) covers the chart catalog, and the model for zero-config defaults done right.
• Vega-Lite — the serializable declarative spec as a value, which is what our retained Plot is.
• seaborn's objects interface — the Mark + Stat split that makes our aggregation pipeline a composition rather than a special case.
• uPlot — columnar data, allocation discipline, and the practice of publishing a non-goals list; we keep one because uPlot showed why.
• pillar (R) and tidy-viewer (Rust) — the significant-figures formatting semantics our number formatting follows.
• matplotlib — the basic plot-type catalog we treat as a coverage checklist, and four decades of accumulated wisdom about what a plotting library owes its users.

The Rust neighborhood#

• ratatui and tui-widgets — the terminal-UI platform we integrate with rather than compete with, and the source of widget-API conventions (consuming builders, snapshot-tested buffers, charset tables as data) we follow.
• terminal_size — our one runtime dependency, and criterion, which keeps our performance claims honest.

The name#

Kazimir Malevich painted Black Square in 1915, a small vocabulary of geometric forms, composed deliberately, on a plain ground. That is the design budget of this library, and the reason release 0.1.0 carries the painting's name.