forge
An exact-arithmetic boundary-representation (B-rep) CAD kernel. Geometric and topological decisions use exact rational arithmetic (ℚ, ℚ[π], ℚ[√d]) or certified intervals; no result depends on a floating-point tolerance.
It ships as two PyPI packages:
forgekernel— the kernel, pure Python.forgekernel_rs— a native (Rust) build of the performance-critical routines, installed automatically when a wheel is available and returning the same results.
Capabilities
- Planar solids: rational linear algebra, plane-based B-rep, booleans, divergence-theorem mass properties.
- Quadrics (cylinder, cone, sphere, torus) with closed-form intersections.
- NURBS curves and surfaces; surface–surface intersection with complete branch detection and certified points.
- Procedural offsets and shells; edge blends (fillets); lofts.
- Exact volume, centroid, and inertia via the divergence theorem.
- STEP (AP203/AP214) import and export.
Design
A Python reference implementation defines the exact semantics. A Rust build provides the same operations for production use; each ported routine is cross-checked against the reference. Design notes and decisions are recorded in the gitcad repository (ADR-0018).
Layout
src/forgekernel/— the Python kernel.rust/forge-core/— the native build (forgekernel_rs).
Install
pip install forgekernel # pure Python
pip install forgekernel[rust] # add the native build
License: Apache-2.0. Source: https://github.com/gitcad-xyz/forge
1 maintainer
Metadata
1 maintainer
Release files for forgekernel 0.9.4
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| forgekernel-0.9.4.tar.gz | 115.8 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| forgekernel-0.9.4-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 210.0 kB
Release files / forgekernel-0.9.4.tar.gz
| Download URL | forgekernel-0.9.4.tar.gz |
|---|---|
| Size | 115.8 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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Transparency logRelease files / forgekernel-0.9.4-py3-none-any.whl
| Download URL | forgekernel-0.9.4-py3-none-any.whl |
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| Size | 94.2 kB |
| Tags | Python 3 |
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SHA-256 checksum How to use checksums |
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Yes |
| Uploaded via |
twine/6.1.0 CPython/3.13.14
|
Provenance
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