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
Release files for openscad-cpp-evaluator 1.23.1
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-1.23.1.tar.gz | 1.7 MB | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| openscad_cpp_evaluator-1.23.1-cp312-abi3-win_arm64.whl | CPython 3.12 | abi3 | Windows ARM64 | Details |
| openscad_cpp_evaluator-1.23.1-cp312-abi3-win_amd64.whl | CPython 3.12 | abi3 | Windows x86-64 | Details |
| openscad_cpp_evaluator-1.23.1-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl | CPython 3.12 | abi3 | Linux glibc 2.27+ x86-64, Linux glibc 2.28+ x86-64 | Details |
| openscad_cpp_evaluator-1.23.1-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl | CPython 3.12 | abi3 | Linux glibc 2.27+ ARM64, Linux glibc 2.28+ ARM64 | Details |
| openscad_cpp_evaluator-1.23.1-cp312-abi3-macosx_13_0_x86_64.whl | CPython 3.12 | abi3 | macOS 13.0+ x86-64 | Details |
| openscad_cpp_evaluator-1.23.1-cp312-abi3-macosx_13_0_arm64.whl | CPython 3.12 | abi3 | macOS 13.0+ ARM64 | Details |
Total release size: 48.1 MB
Release files / openscad_cpp_evaluator-1.23.1.tar.gz
| Download URL | openscad_cpp_evaluator-1.23.1.tar.gz |
|---|---|
| Size | 1.7 MB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
b1a58105c74c4fdce03ddca2fc13e0e24116252314dba78a5ff003bc3f63f083
|
|
BLAKE2b-256 checksum How to use checksums |
a1c957fa26262aa061d4ad9023afb6f222029001d43371f6aaa3e9b821d4cbde
|
| 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-1.23.1-cp312-abi3-win_arm64.whl
| Download URL | openscad_cpp_evaluator-1.23.1-cp312-abi3-win_arm64.whl |
|---|---|
| Size | 10.3 MB |
| Tags | CPython 3.12 Windows ARM64 abi3 |
|
SHA-256 checksum How to use checksums |
1de875274ed7f16129c42824f12fd5b5748fe726031a8d7831ef0265ecff0364
|
|
BLAKE2b-256 checksum How to use checksums |
57ce929c7577bb73c9290a102ac9b132b498e9eda998632d37c8209e42903aa7
|
| 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-1.23.1-cp312-abi3-win_amd64.whl
| Download URL | openscad_cpp_evaluator-1.23.1-cp312-abi3-win_amd64.whl |
|---|---|
| Size | 10.8 MB |
| Tags | CPython 3.12 Windows x86-64 abi3 |
|
SHA-256 checksum How to use checksums |
37b762c3ea6536e4af7011588b7c01679bc02efd19de574e0dc890273b8c2a5a
|
|
BLAKE2b-256 checksum How to use checksums |
7402b1eaf753d3df095038056cdbaea57142a493bf0c5313812f5e2e61c4ff30
|
| 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-1.23.1-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
| Download URL | openscad_cpp_evaluator-1.23.1-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl |
|---|---|
| Size | 7.2 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 |
2f4b059bfde5a6e7d84083cd4583ab8312e509e63f1157bc012d813dfa722aca
|
|
BLAKE2b-256 checksum How to use checksums |
9db10e73756a98d979447ffa10aac0138256789ca5adda2f84dc3e155460600a
|
| 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-1.23.1-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
| Download URL | openscad_cpp_evaluator-1.23.1-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl |
|---|---|
| Size | 6.8 MB |
| Tags | CPython 3.12 Linux glibc 2.27+ ARM64 Linux glibc 2.28+ ARM64 abi3 |
|
SHA-256 checksum How to use checksums |
2e337fa2a9cf9c541a73d8c292d76afe14e7a7d8c557cd7ddeb89084aa4260a7
|
|
BLAKE2b-256 checksum How to use checksums |
573d58c2a709e0ba1cc8982f907f971d14971ccfb879fb11f2027b9913d39f8f
|
| 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-1.23.1-cp312-abi3-macosx_13_0_x86_64.whl
| Download URL | openscad_cpp_evaluator-1.23.1-cp312-abi3-macosx_13_0_x86_64.whl |
|---|---|
| Size | 5.8 MB |
| Tags | CPython 3.12 abi3 macOS 13.0+ x86-64 |
|
SHA-256 checksum How to use checksums |
d0e31ce287fd703019cb979365265b142f17106a76b736a3bb81ae2e225ca298
|
|
BLAKE2b-256 checksum How to use checksums |
a258fd4beaa7386fe8da0065448340973ef3e26ab1acf45ff50d7d5c0f60cd96
|
| 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-1.23.1-cp312-abi3-macosx_13_0_arm64.whl
| Download URL | openscad_cpp_evaluator-1.23.1-cp312-abi3-macosx_13_0_arm64.whl |
|---|---|
| Size | 5.5 MB |
| Tags | CPython 3.12 abi3 macOS 13.0+ ARM64 |
|
SHA-256 checksum How to use checksums |
af586e1615044d45be80afbc40ffc06cebbc32ea30d4d33414db735cb62fee14
|
|
BLAKE2b-256 checksum How to use checksums |
2e8a13d2fa7ede499268e5c89c939b972c7c41407f3c91a80e12d8c9f55839d0
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
