forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Opus 4.8
3f060a570a
Selection tested a flat 8 px radius around each wire's centreline and nothing else, so two things the user can see were not pickable. A wire renders as a band `line_weight_px` wide, so pick now widens to that rendered half-width via `pick_tolerance_px`, mirroring the wire shader's `select(0.5, half_width, lwdisplay_enable)`. Behaviour is unchanged for every standard weight (the widest, 2.11 mm, renders 7.97 px half-width — just under the 8 px threshold); this keeps the two sides from drifting apart if the display boost in `lineweight_to_px` ever changes. Entities extruded by a DXF thickness draw their wall as four edges with nothing in between, so the interior was a hole the cursor fell through. WireModel gains `pick_tris`: triangles hit-testing treats as solid and the renderer never uploads. Kept apart from `fill_tris` because that channel reaches the GPU, and a wall that rendered shaded would change how every thickness drawing looks. Ranked below `fill_tris` — those are drawn, these are not, so where they overlap the drawn face is what the user means. Walls are dropped when a wire is projected into a floating viewport: `points` are reprojected and clipped into paper coords there, so cloned model-space triangles would hit-test at a model-scale offset. Extruded entities stay selectable by their edges, which do get projected. The wall loop runs on every hover that misses everything else, so it rejects on the wire's AABB first — an extruded circle is ~128 triangles and a drawing full of thickness would otherwise project every wall on each mouse move. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Open CAD Studio
OCS is a CAD application for 2D drafting and 3D modeling, built with Rust. Reads and writes DWG and DXF files natively. Also has a web version now!
OCS Web try it in the browser: https://hakanseven12.github.io/OpenCADStudio/
Features
File Formats
- DWG read/write (R13 through R2018)
- DXF read/write (R13 through R2018)
- STL export (
STLOUT/EXPORTSTL) - STEP AP203 export (
STEPOUT) - OBJ import (
IMPORTOBJ) - PDF export (plot layouts to PDF)
- WBLOCK — write selected entities or a block to an external file
- XREF — attach, reload, and auto-resolve external references
2D Drafting
| Command | Description |
|---|---|
LINE, PLINE, RECTANG, POLYGON |
Basic geometry |
CIRCLE, ARC, ELLIPSE, SPLINE |
Curves |
HATCH, HATCHEDIT |
Hatch fills with pattern, scale, angle editing |
OFFSET, TRIM, EXTEND, FILLET |
Modify geometry (supports lines, arcs, ellipses, polylines, splines) |
BREAK, STRETCH, LENGTHEN |
Shape editing |
ARRAY, MIRROR, MOVE, COPY, ROTATE, SCALE |
Transformations |
EXPLODE |
Explode blocks, dimensions, polylines, mlines |
DDEDIT |
Double-click text editing |
MASSPROP |
Area, perimeter, centroid of selected entities |
3D Modeling
| Command | Description |
|---|---|
BOX, SPHERE, CYLINDER |
Solid primitives |
EXTRUDE, REVOLVE |
Profile-based solids |
LOFT |
Ruled-surface loft through cross-sections |
SWEEP |
Sweep a profile along a path |
ARRAY3D |
3D array |
| ACIS tessellation | Renders 3DSOLID, REGION, and BODY entities |
Annotations & Dimensions
- Dimensions: Linear, Aligned, Angular, Radial, Diameter, Ordinate — with full
DIMSTYLEsupport (DIMASZ,DIMSCALE,DIMEXO,DIMEXE, and more) - Text:
MTEXT,TEXT,DTEXTwith font browser (STYLE DIALOG) - Leaders:
MLEADERwith straight and spline path types;MLEADERSTYLEmanager - Tolerances: GD&T feature control frames
- Tables:
TABLEentity render;TABLESTYLEmanager - MLine:
MLINEentity withMLSTYLEmanager andEXPLODEsupport
Paper Space & Layouts
- Multi-tab layout system with model space and unlimited paper space tabs
- Viewport projection: Model content correctly projected into paper-space viewport rectangles
- Camera persistence: View position and zoom saved per layout; restored on file open and tab switch
- Correct paper size: Physical paper dimensions read from embedded PlotSettings (not drawing limits)
- Inline MSPACE overlay — enter a viewport with double-click; edit model entities in place
VPORTS— preset viewport configurations (single, 2H, 2V, 4-way)LAYOUTMANAGER/LAYOUTPANEL— GUI layout managerPLOTSTYLEPANEL/STYLESMANAGER— plot style table editor (CTB/STB)PRINT— send layout to system printer
Blocks & References
INSERTwith attribute prompting (ATTREQ)ATTEDIT— edit block attribute values interactivelyREFEDIT/REFCLOSE— in-place block reference editingXREF— attach, reload, and resolve external DWG/DXF referencesDATAEXTRACTION— export entity property data to CSV
Snapping & Precision
- Object snaps: Endpoint, Midpoint, Center, Node, Quadrant, Intersection, Perpendicular, Tangent, Nearest, Insertion, and more
- Ellipse arc endpoints, LWPolyline arc midpoints, Hatch boundary points
- Object Snap Tracking (
OTRACK/F11) - Polar Tracking with configurable angle increment
- Dynamic Input overlay (
DYNMODE/F12) - Grid snap with adaptive spacing
- Command history navigation (↑ / ↓)
Rendering
- GPU-accelerated via WebGPU (wgpu)
- 4× MSAA anti-aliasing
- Orthographic and perspective camera
- ViewCube with face/edge/corner snapping
- Wide polylines: LWPolyline and Polyline2D filled strokes
- Raster images: GPU-textured quad pipeline (
IMAGEcommand) - Wipeout: Solid fill masking
- Complex linetypes: Text and shape elements rendered in linetype patterns
- White/black entity colors adapt to background luminance
- Per-viewport background color (
BACKGROUND) - Visual style selector (Wireframe, Shaded, etc.)
- X-ray ghost pass for selected wires occluded by geometry
UI
- Modular ribbon interface — Home, Insert, Annotate, View, Manage, Layout
- Command line with autocomplete and history
- Layer Manager with per-viewport freeze columns
- Properties panel
COLORSCHEME— runtime theme switchingSHORTCUTS— keyboard shortcuts panelSPLINEDIT— close, open, reverse spline control points- UCS icon with 3D foreshortening and axis labels
Installation
Linux (AppImage)
Download OpenCADStudio-*-linux-x86_64.AppImage from the latest release, then:
chmod +x OpenCADStudio-*-linux-x86_64.AppImage
./OpenCADStudio-*-linux-x86_64.AppImage
No installation required — runs directly on any modern Linux distribution.
Windows
Download OpenCADStudio-*-windows-x86_64.exe from the latest release and run it directly. Windows SmartScreen may show "Windows protected your PC" because the binary is not yet code-signed — click More info → Run anyway.
macOS (Apple Silicon)
Apple Silicon (M-series) only; Intel macOS isn't built. The app is ad-hoc signed but not Apple-notarised (notarisation requires a paid Apple Developer ID), so macOS Gatekeeper guards the first launch. Pick whichever path is easiest:
Option A — Homebrew (recommended):
brew install --cask --no-quarantine \
https://raw.githubusercontent.com/HakanSeven12/OpenCADStudio/main/packaging/homebrew/open-cad-studio.rb
--no-quarantine lets Gatekeeper skip the unsigned-app prompt. See packaging/homebrew/ for publishing this as a brew tap.
Option B — manual .dmg:
Download OpenCADStudio-*-macos-arm64.dmg from the latest release, open it, and drag OpenCADStudio.app to /Applications. If the first launch is blocked, clear the quarantine flag once:
xattr -dr com.apple.quarantine /Applications/OpenCADStudio.app
On older macOS you can instead right-click OpenCADStudio.app → Open and confirm; on macOS Ventura and later, approve it via System Settings → Privacy & Security → Open Anyway.
Build from Source
Requirements: Rust 1.75+
git clone https://github.com/HakanSeven12/OpenCADStudio.git
cd OpenCADStudio
cargo build --release --bin OpenCADStudio
./target/release/OpenCADStudio
Star History
License
GPL-3.0-only — see LICENSE