Open CAD Studio

Open CAD Studio (OCS) is a CAD application for 2D drafting and 3D
modeling, built in Rust. Reads and writes DWG and DXF files natively
(R13 through R2018).

File formats:
- DWG and DXF read/write (R13-R2018)
- STL export, STEP AP203 export, OBJ import
- PDF export (plot layouts)
- WBLOCK, and XREF (attach/reload/auto-resolve external references)

2D drafting:
- Lines, polylines, rectangles, polygons, circles, arcs, ellipses,
splines
- Hatch fills with pattern, scale, and angle editing
- Offset, trim, extend, fillet, break, stretch, lengthen
- Array, mirror, move, copy, rotate, scale, explode
- Double-click text editing, and area/perimeter/centroid measurement

3D modeling:
- Solid primitives (box, sphere, cylinder), extrude, revolve, loft,
sweep, and 3D array
- ACIS tessellation for rendering 3DSOLID/REGION/BODY entities

Open CAD Studio is open source, part of the OpenAEC Foundation family
of applications, and rendered with wgpu for GPU-accelerated 2D/3D
drawing.