The pen
A Python port of the approved sketch engine. Each stroke is a centre-line with a pressure per node; a level nib sweeps it. skia-pathops joins the sweep and the loom fits it with a few cubic curves. No outline comes from another font.
machine-made type
machine-made Warp
A Modern serif for science, drawn by a pen
version 0.100 · 306 characters · six styles
∫ e−x² dx = √π
Warp is the fourth machine-made typeface: a Modern with vertical stress, for papers and maths. No outline is drawn by hand. Every letter is a few centre-lines swept by one level pen, and its hairlines, serifs and teardrops all come out of that pen.
i.
Set a line
Four styles for text at optical size 10, and Display for titles at optical size 60. The switch also sets the paragraph below.
Style
Draw resonance in viscous threads, 1972
ii.
A paragraph from a paper
Set at 18 px and at 15 px, with old-style figures in the text and the italic for terms.
Abstract. We study the drawing of a thin viscous thread from a heated preform. When the draw ratio exceeds a critical value near 20.2, the steady state loses stability through a Hopf bifurcation and the radius of the fibre oscillates, a regime known as draw resonance. Writing the axial velocity as u(x, t) = U(x) + ε u′(x) eλt, we obtain a linear eigenvalue problem for λ, whose spectrum we compute by Chebyshev collocation on 128 points.
The leading mode depends only weakly on the capillary number Ca; inertia and cooling, not surface tension, set the threshold. Above it, the amplitude grows as (D − Dc)1/2, which is the signature of a supercritical bifurcation (Fig. 3, Table 1). The same scaling holds for drawn glass fibres and for polymer films at Reynolds numbers below 10−3.
iii.
Greek
All 24 capitals, 24 lowercase and the final sigma. Single pen movements, no slab serifs on the lowercase. The capitals that look like Latin ones are the Latin ones.
CapitalsΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩ
Lowercaseαβγδεζηθικλμνξοπρσςτυφχψω
Italicαβγδεζηθικλμνξοπρσςτυφχψω
Next to Latinaα oο uυ vν nη pρ wω
Maths∂u/∂t + (u · ∇)u = −∇p/ρ + ν∇²u ∑ ∏ ∫ √ ∞ ≤ ≥ ≈ ≡ ∝ ∈ ∉ ⊂ ⊆ ∪ ∩ ∀ ∃ ∅ → ↔
iv.
Figures and small capitals
The default figures are lining and tabular, for tables and papers. Old-style figures are one feature away, as in the sketch. Small capitals are real small capitals: drawn at 1.1 times the x-height, with heavier hairlines.
Lining, tabular
default0123456789 · 1,204.25 · 2026Old-style
onum0123456789 · 1,204.25 · 2026Lining, proportional
pnum0123456789 · 1,204.25 · 2026Small capitals
smcpFigure 3 and Table 1 in Section 4All small capitals
c2scNASA, ESA AND CERNLigatures
ligafibre, flow, effect, office, bafflev.
306 characters
Read from the font's character map when the site is built. Select a character to see it large. 429 glyphs in all, with the small capitals, the four figure styles and the ligatures.
a
Loading the character map.
vi.
From a sketch to a font
Agents write the generator, the tests and the CI. People set the goals and review the proofs.
Proofs
The sketch engine and the font overlaid for every style; every glyph compared with its pen sweep; equations set by the sketch's maths setter with the font's glyphs; an OCR test against DejaVu Serif.
Next
0.2 adds the OpenType MATH table: stretchy delimiters, radicals and big operators drawn by the pen at each size. 0.3 makes Warp a variable font with weight and optical size axes.