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[devaraj3]

Generate standards-compliant 2D engineering drawings from any loaded 3D model,
with full manual layout control and true-size PDF export.

What it does

Adds a "Generate 2D Drawing" flow producing an A4 landscape sheet with
third-angle Front/Top/Right projections, an isometric reference view,
automatic dimensioning, notes, and an editable title block — exported as a
print-accurate PDF.

Drawing generation

• Third-angle projection with locked view alignment (Top above Front,
  Right beside Front on a shared centreline)
• Automatic dimensioning via a sheet-wide DimensionPlan: each feature+axis
  is dimensioned exactly once, assigned to whichever view shows it most
  directly
• Stepped/counterbored hole detection, size-grouped callouts (e.g. 6X ⌀3.0),
  shared dimension lines for exact-coincident values
• Leader lines with landing shoulders and arrowheads, full-circumference
  angular routing for radial feature clusters
• ISO 5457 sheet layout: 20mm filing margin / 10mm others, grid reference
  frame (top and right on A4), centring marks
• Drafting-standard spacing from a single constants module — 10mm first
  dimension line offset, 10mm parallel spacing, 1.5mm extension gap,
  2.5mm overshoot

Scale

• Anchored selection: 1:1 evaluated first, stepping down the standard
  reduction series only when the view-outline rule (250 × 145mm) or the
  usable-page overflow guard fails
• Manual override with standard ratios, red-bordered warning with hover
  detail when a chosen scale overflows

Editing

• Modal viewer with zoom (100–400%, manual entry, pannable)
• Adjust Drawing: whole composition, or Top / Right / isometric individually
  with projection-correct constraints
• Adjust Annotations: per-dimension repositioning constrained to each
  dimension's valid axis; captions; delete individual dimensions
• Optional numbered notes block with in-place editing (max 8 × 100 chars),
  draggable with collision constraints
• Spreadsheet-style editable title block: insert/delete/merge/split/resize,
  logo upload or generated name avatar, auto-populated non-editable
  SCALE and SIZE fields

Export

• True-size A4 PDF (297 × 210mm) via jsPDF (MIT) — prints dimensionally
  accurate at 100%
• Vector line work and selectable text throughout; isometric embedded at
  300+ DPI
• Editor-only UI excluded; all manual adjustments captured

Notes

• Automated sheet validation (sheet-checker.ts) is present but disabled
  behind a flag — manual adjustment covers layout correction
• Known open: coaxial stepped-bore size callouts can overlap on parts with
  several bores sharing one centre (e.g. flange test part); adjustable
  manually

[vercel]

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Project	Deployment	Actions	Updated (UTC)
cad-viewer	Ready	Preview	Aug 21, 2026 4:44pm