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§20 family: Lines, arcs, circles, points, ellipses, splines, rays and xlines (§20.4.18, §20.4.20, §20.4.21, §20.4.31, §20.4.39, §20.4.40, §20.4.42, §20.4.43) #143
Description
Spec: ODA Open Design Specification for .dwg files v5.4.1, §20.4.18, §20.4.20, §20.4.21, §20.4.31, §20.4.39, §20.4.40, §20.4.42, §20.4.43.
Sections and their state on main (2026-10-21)
| Section | State | Code | Note |
|---|---|---|---|
| §20.4.18 ARC (17) (p. 118) | closes |
src/entities/arc.rs | |
| §20.4.20 CIRCLE (18) (p. 119) | closes |
src/entities/circle.rs | |
| §20.4.21 LINE (19) (p. 120) | closes |
src/entities/line.rs | |
| §20.4.31 POINT (27) (p. 128) | closes |
src/entities/point.rs | |
| §20.4.39 ELLIPSE (35) (p. 136) | closes |
src/entities/ellipse.rs | |
| §20.4.40 SPLINE (36) (p. 136) | closes |
src/entities/spline.rs | |
| §20.4.42 RAY (40) (p. 146) | closes |
src/entities/ray.rs | |
| §20.4.43 XLINE (41) (p. 147) | closes |
src/entities/xline.rs |
closes comes from the boundary checks on the local 19-file corpus (STATUS.md, 2026-08-30). It is re-measured on the public corpus in CI by the 0.2.0 measurement epic, and no section is complete until its values equal AutoCAD's own DXF export.
Acceptance, for every section above
- Every field of its prescription is read, with every version branch the section names
- Where the section prints an example, its bytes are a committed fixture and decode to the values printed
- The field list ends on the record's exact data-stream boundary (and string/handle-stream boundaries on R2007+) on every corpus record of the type, on every release band
- Every value equals AutoCAD's DXF export of the same drawing, matched by handle (DXF group 5), with the scorer from the oracle epic
- The corpus holds at least one record of the type on each release band, R13 to R2018; a band without one is recorded on the corpus epic, not assumed
- Its row in docs/spec-coverage.md moves to
complete, with the evidence linked
Subtasks
- §20.4.18 ARC (17)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.20 CIRCLE (18)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.21 LINE (19)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.31 POINT (27)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.39 ELLIPSE (35)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.40 SPLINE (36)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.42 RAY (40)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
- §20.4.43 XLINE (41)
- R13
- R14
- R2000
- R2004
- R2007
- R2010
- R2013
- R2018
A subtask becomes its own issue when someone picks it up; that issue quotes the section's field list and names the corpus records it is measured on.
Parent: #138
Activity
feat(dxf): score SPLINE in the value oracle (§20.4.40) (#394)