fix(viewer2d): show lineweight at AutoCAD's display scale (20 px/mm)

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Hand test against an AutoCAD capture: the 0.50mm road edge is ~10px
there but only ~4px here. Lineweight is zoom-independent screen pixels,
so the two captures compare directly - the 8 px/mm mapping was 2.5x too
small. AutoCAD's default display scale is one pixel per 0.05mm, so use
20 px/mm (0.35mm = 7px, 0.50mm = 10px, 2.11mm = 42px) and raise the
clamp to 48px.

Add setLineweightScale()/getLineweightScale() so a host can retune it -
AutoCAD exposes the same thing as the Adjust Display Scale slider.

Re-measured headless: the 0.35mm road-gutter line now renders ~7px, so
both weight classes land on the same scale.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

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This commit is contained in:

minsung

2026-08-04 20:34:27 +09:00

co-authored by Claude Opus 5

parent ce3859c487

commit cf1298749b

5 changed files with 6051 additions and 11 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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