Expand description
The math-metrics table: TeX’s Appendix-G parameter family, synthesized for the bundled faces.
Provenance. The values are the published TFM fontdimen families of
Computer Modern at 10 pt — cmsy10’s σ₅…σ₂₂ and cmex10’s ξ₈…ξ₁₃ (The
TeXbook, Appendix G; the parameters Appendix G consumes by name) —
expressed in ems of the design size. The G0-3 spike ratified this
synthesis method (franken_manim docs/g0/G0-3-fmd-math-ratification.md,
Verdict 1): compile the published family in as em constants and
validate against geometry decoded from the bundled faces by
fmd-font. The bundled CM Unicode faces measure within 0.13 % of the
published x-height and match the axis height exactly — they are the
Computer Modern the TFM family describes. The validation tests promoted
from the spike live in this crate’s suite; per-face recalibration only
ever happens through the same measure-and-validate seam.
Scaling rule. Every parameter is stored in ems of the text size and is multiplied by the current style’s size factor at use — the analogue of TeX reading fontdimens from the current size’s symbol font.
Structs§
- Math
Constants - The Appendix-G parameter family, in ems of the text-size em.
Constants§
- CM
- The Computer Modern family at 10 pt, in ems (values as published for cmsy10/cmex10; see the module docs for provenance and validation).