openscad_cpp_evaluator
A C++20 port of openscad_evaluator (Python): an AST-walking
geometry engine that takes a parsed OpenSCAD AST and produces Manifold
CSG geometry, ready to export to STL/OBJ/OFF/3MF or hand off to a renderer.
Built on:
openscad_cpp_parser(git submodule) for lexing/parsing/AST/scope resolution.- Manifold v3.5.2 for the actual CSG boolean/mesh engine.
- Boost.Polygon for
roof()'s Voronoi-diagram construction. nothings/stb(header-only) forsurface()'s image loader and the built-in font provider's TrueType parsing/rasterization.
All fetched automatically via CMake FetchContent — no manual dependency installation beyond the
toolchain below.
Status
All planned phases (0–9) are complete: the full primitive/transform/boolean/modifier/control-flow
language surface, every builtin function, STL/OBJ/OFF/3MF import and export, hull()/minkowski()/
linear_extrude()/rotate_extrude()/roof()/offset()/surface()/DXF & SVG import/text(), an
opt-in content-hash geometry cache, per-call-site profiling, and a gdb-style --debug REPL. See
CLAUDE.md for the full phase-by-phase history and architecture notes.
Build
Requires:
- CMake ≥ 3.24
- A C++20 compiler (Clang, GCC, or MSVC — all three are covered by CI)
- Bison ≥ 3.8 and Flex
- macOS:
brew install bison flex(the system bison is too old; CMake auto-detects Homebrew's) - Linux:
sudo apt-get install bison flex - Windows: MSYS2's
bison/flex(pacman -S bison flex) — GitHub'swindows-latestrunner ships MSYS2 pre-installed atC:\msys64; CMake auto-detects it there too
- macOS:
GoogleTest and every other C++ dependency are fetched automatically.
git clone --recurse-submodules <this-repo>
cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build -j
(Omitting -DCMAKE_BUILD_TYPE=Release builds unoptimized — pass it explicitly for anything
performance-sensitive.)
On Windows, CMake defaults to the multi-config Visual Studio generator, which ignores
CMAKE_BUILD_TYPE; pass --config Release to cmake --build (and -C Release to ctest)
instead.
Test
ctest --test-dir build --output-on-failure
Run a single binary or filter:
build/tests/oscad_eval_tests
build/tests/oscad_eval_tests --gtest_filter='FormatNumber.*'
The suite runs twice in CI — once with the bytecode VM on (the default) and once with it off
(OSCAD_BYTECODE_VM=0) — so a regression in either the compiled or interpreted expression-eval
path is caught.
CLI
build/tools/cli/openscad-cpp-evaluator <input.scad> -o <output.{stl,obj,off,3mf}> [--format stl|obj|off|3mf] [--debug]
The output format is inferred from -o's extension, or set explicitly with --format.
--debug drops into a gdb-style REPL (break/run/continue/step/next/finish/print/
backtrace/set/list/quit/help) before and during evaluation.
build/tools/cli/openscad-cpp-evaluator model.scad -o model.stl
Architecture
See CLAUDE.md for the full per-file architecture map, the Python-reference cross-check history,
and the rationale behind every non-obvious design choice (the two-pass resolve/generate CSG
pipeline, the FontProvider injection seam, the closure-detection rule, etc.).
CI
GitHub Actions builds and tests on Linux, macOS, and Windows on every push/PR (.github/workflows/ci.yml).
1 maintainer
Metadata
1 maintainer
Release files for openscad-cpp-evaluator 1.38.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| openscad_cpp_evaluator-1.38.0.tar.gz | 1.7 MB | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| openscad_cpp_evaluator-1.38.0-cp312-abi3-win_arm64.whl | CPython 3.12 | abi3 | Windows ARM64 | Details |
| openscad_cpp_evaluator-1.38.0-cp312-abi3-win_amd64.whl | CPython 3.12 | abi3 | Windows x86-64 | Details |
| openscad_cpp_evaluator-1.38.0-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.12 | abi3 | Linux glibc 2.28+ x86-64, Linux glibc 2.27+ x86-64 | Details |
| openscad_cpp_evaluator-1.38.0-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl | CPython 3.12 | abi3 | Linux glibc 2.28+ ARM64, Linux glibc 2.27+ ARM64 | Details |
| openscad_cpp_evaluator-1.38.0-cp312-abi3-macosx_13_0_x86_64.whl | CPython 3.12 | abi3 | macOS 13.0+ x86-64 | Details |
| openscad_cpp_evaluator-1.38.0-cp312-abi3-macosx_13_0_arm64.whl | CPython 3.12 | abi3 | macOS 13.0+ ARM64 | Details |
Total release size: 49.1 MB
Release files / openscad_cpp_evaluator-1.38.0.tar.gz
| Download URL | openscad_cpp_evaluator-1.38.0.tar.gz |
|---|---|
| Size | 1.7 MB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
ac6ae30170cd3bf622fb35d090dc51666e44211884402d2945498ccc30a44a4d
|
|
BLAKE2b-256 checksum How to use checksums |
2f690bc397a8a46cbab5ddc21f381a29f7886540d8428a3ef04706a38d5d1ede
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / openscad_cpp_evaluator-1.38.0-cp312-abi3-win_arm64.whl
| Download URL | openscad_cpp_evaluator-1.38.0-cp312-abi3-win_arm64.whl |
|---|---|
| Size | 10.4 MB |
| Tags | CPython 3.12 Windows ARM64 abi3 |
|
SHA-256 checksum How to use checksums |
2e34b4231e73ec6d9054be6213ada1ab06e4215dece552b212be2a9538e6c8c7
|
|
BLAKE2b-256 checksum How to use checksums |
69311b1c2c95600e6fdd31fedfaf696718b95edb30915b3c23aea77426ff0453
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / openscad_cpp_evaluator-1.38.0-cp312-abi3-win_amd64.whl
| Download URL | openscad_cpp_evaluator-1.38.0-cp312-abi3-win_amd64.whl |
|---|---|
| Size | 10.9 MB |
| Tags | CPython 3.12 Windows x86-64 abi3 |
|
SHA-256 checksum How to use checksums |
e3cc3ceca66df4eba993d4ae3655640bc07407a655efca37c726664d679f47a7
|
|
BLAKE2b-256 checksum How to use checksums |
1e01cf8bac28ca0e376f4b9f294007136501e05f1d3f7d66b21bd15040274db7
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / openscad_cpp_evaluator-1.38.0-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
| Download URL | openscad_cpp_evaluator-1.38.0-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl |
|---|---|
| Size | 7.4 MB |
| Tags | CPython 3.12 Linux glibc 2.27+ x86-64 Linux glibc 2.28+ x86-64 abi3 |
|
SHA-256 checksum How to use checksums |
410ce352ef6af0b2cfedc8e3f8f7d82d8e8a79778f99a5c77f8b80b5eaac21ad
|
|
BLAKE2b-256 checksum How to use checksums |
d18d97fa326dbc136af101bef24fb9c138b061e860f5d12031802b266af7701e
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / openscad_cpp_evaluator-1.38.0-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
| Download URL | openscad_cpp_evaluator-1.38.0-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl |
|---|---|
| Size | 7.0 MB |
| Tags | CPython 3.12 Linux glibc 2.27+ ARM64 Linux glibc 2.28+ ARM64 abi3 |
|
SHA-256 checksum How to use checksums |
ee99ad15d9e036982932ec0bd357a8e7b285d64ed6619f746b4516c2b9ad6d83
|
|
BLAKE2b-256 checksum How to use checksums |
1088248955788899e20d8091a1a61dbcd2f60c86d1b2669e894fc7a9513a3390
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / openscad_cpp_evaluator-1.38.0-cp312-abi3-macosx_13_0_x86_64.whl
| Download URL | openscad_cpp_evaluator-1.38.0-cp312-abi3-macosx_13_0_x86_64.whl |
|---|---|
| Size | 6.0 MB |
| Tags | CPython 3.12 abi3 macOS 13.0+ x86-64 |
|
SHA-256 checksum How to use checksums |
8247c73e82dbc5b608f994a59e2901b68a4aadf3a2b494b6c7f3effe221771b1
|
|
BLAKE2b-256 checksum How to use checksums |
5673aa6a53e05b95db4a7577c56a236918201ddde0c18e33f9d71a3dd3b98f03
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / openscad_cpp_evaluator-1.38.0-cp312-abi3-macosx_13_0_arm64.whl
| Download URL | openscad_cpp_evaluator-1.38.0-cp312-abi3-macosx_13_0_arm64.whl |
|---|---|
| Size | 5.7 MB |
| Tags | CPython 3.12 abi3 macOS 13.0+ ARM64 |
|
SHA-256 checksum How to use checksums |
26584a9b3152eba0affc0d9644b9410ac3aac6dd33e4bc3da578961429850a17
|
|
BLAKE2b-256 checksum How to use checksums |
a527aee81753448d19faa077aa165b67bf16fb6eb26dd55193d6cb0f59c1177c
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
