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CAD Designer — true NURBS B-Rep
Parametric solid modelling on the OCCT kernel: constraint-solved sketches, feature tree, wizards, assemblies, manufacturing analyses, tolerances/GD&T, point-cloud as-built verification and STEP/IGES/STL/DXF.
OCCT B-RepSketch constraint solver6-DOF assemblySTEP AP242 PMI237/237 regression gates
Screens
Inside the panel
Sketch, feature tree, assembly, analyses and as-built.
Modelling
Sketch and solid
- ✓2D sketch — line/rectangle/circle/ellipse/arc/polyline/polygon/slot/centreline; offset, 2D fillet, sketch patterns; reference image underlay (PNG/JPG, calibrated); sketch repair
- ✓Constraint solver — horizontal/vertical/parallel/perpendicular/equal/tangent/symmetric/point-on/distance/chain; driving parametric dimensions; DOF counter and conflict diagnosis
- ✓Solids — box/cylinder/sphere/cone, extrude, cut-extrude, revolve, loft, sweep, helix; fuse/cut/common; shell (with tolerance); fillet/chamfer (selected edges, criteria filter); draft, rib, mirror; linear/circular patterns; multi-body shelf
- ✓Sketch on face — plus sketch↔model projection
- ✓Wizards — holes (plain/countersunk/counterbore, M3–M12), true helical threads, involute gears (spur/internal/rack/helical/bevel/worm), hooks
Feature tree and assembly
Parametric history
- ✓FeatureManager-style tree — delete/reorder/suppress/rename, rollback bar, undo/redo, rebuild cache, persistent face/edge identity
- ✓Equations and configurations — global parameters (
dia/2,sqrt(a^2+b^2)), part-family variants (M6/M8/M10) - ✓Assembly — 6-DOF mates (coincident/concentric/distance/parallel/angle), face-pick mating, simultaneous solve (Levenberg-Marquardt); interference check with exact boolean volume; assembly mass
Analysis, tolerances, as-built
Verification
- ✓Mass properties — volume, area, centre of mass, moments of inertia (exact via OCCT); wall thickness; section view
- ✓Manufacturing — DFM report (deep holes, tool access, sharp internal corners), part-type inference (turning/milling), draft + true undercut analysis with heat map, design health score, change impact
- ✓Tolerances — ISO 286 fit analysis, tolerance stack-up (worst-case/RSS), GD&T suggestions, semantic GD&T bound to face/edge identity, assembly fit verification, tolerance reading from drawing PDFs
- ✓As-built / point cloud — XYZ / ASCII PLY / CSV scans; deviation from nominal (RMS, heat colouring); PCA coarse + ICP fine registration; FAI PASS/FAIL with HTML report; voxel surface reconstruction, plane snapping
- ✓Files — STEP (true NURBS; assemblies; AP242 PMI), IGES read/write, STL read/write, DXF 2D import/export, self-contained
.berkcad - ✓Catalog and visualisation — parametric templates, electronic package models, token-based search; finishes, transparent preview, evidence highlighting
- ✓AI assistant — 153 tools; command line = AI tool = menu; MCP bridge
Scope note: Technical drawings (sheets/views/sections/title block), sheet metal, surface bodies/thicken, exploded views, BOM, motion studies and rendering are not included; binary PLY/E57 point clouds are not supported.