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 1.43.0
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-1.43.0.tar.gz | 1.8 MB | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| openscad_cpp_evaluator-1.43.0-cp312-abi3-win_arm64.whl | CPython 3.12 | abi3 | Windows ARM64 | Details |
| openscad_cpp_evaluator-1.43.0-cp312-abi3-win_amd64.whl | CPython 3.12 | abi3 | Windows x86-64 | Details |
| openscad_cpp_evaluator-1.43.0-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-1.43.0-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-1.43.0-cp312-abi3-macosx_13_0_x86_64.whl | CPython 3.12 | abi3 | macOS 13.0+ x86-64 | Details |
| openscad_cpp_evaluator-1.43.0-cp312-abi3-macosx_13_0_arm64.whl | CPython 3.12 | abi3 | macOS 13.0+ ARM64 | Details |
Total release size: 49.5 MB
Release files / openscad_cpp_evaluator-1.43.0.tar.gz
| Download URL | openscad_cpp_evaluator-1.43.0.tar.gz |
|---|---|
| Size | 1.8 MB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
dbcc0ec5f7bc7b0be9d64e2e46ce04375a1d11a89d02f51e847cca9738594389
|
|
BLAKE2b-256 checksum How to use checksums |
006de0877eb5c51f2c39a010dbf93c11ed0c109b563f00f55c8ccb4cf6c7cff8
|
| 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-1.43.0-cp312-abi3-win_arm64.whl
| Download URL | openscad_cpp_evaluator-1.43.0-cp312-abi3-win_arm64.whl |
|---|---|
| Size | 10.5 MB |
| Tags | CPython 3.12 Windows ARM64 abi3 |
|
SHA-256 checksum How to use checksums |
34aff31e1345fc4015deda56e4a6216b0bde5c870e9ff4c78db2b0a9dc30dd3a
|
|
BLAKE2b-256 checksum How to use checksums |
9606f4ced0e52bbf079964d131da21e20391592fe7ba5924a0128c60063d1ad8
|
| 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-1.43.0-cp312-abi3-win_amd64.whl
| Download URL | openscad_cpp_evaluator-1.43.0-cp312-abi3-win_amd64.whl |
|---|---|
| Size | 10.9 MB |
| Tags | CPython 3.12 Windows x86-64 abi3 |
|
SHA-256 checksum How to use checksums |
0c9a941607fb1dec5e67bc068fcd6397969f2594d0c17eae1039a2edbd46c90b
|
|
BLAKE2b-256 checksum How to use checksums |
ba59d9c9ce47381916c67055ae530ff44c581ba6288f4f336fd190d98c7eebc3
|
| 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-1.43.0-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl
| Download URL | openscad_cpp_evaluator-1.43.0-cp312-abi3-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl |
|---|---|
| Size | 7.5 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 |
feba43c012deb25b06a4e9924969f44ec36f9add7d8f3b1d25cea48f9b6b27e4
|
|
BLAKE2b-256 checksum How to use checksums |
f5da2b47c95d7228a55132450cf389143b4e44407fe9589b054f43d64b29336e
|
| 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-1.43.0-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
| Download URL | openscad_cpp_evaluator-1.43.0-cp312-abi3-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl |
|---|---|
| Size | 7.1 MB |
| Tags | CPython 3.12 Linux glibc 2.27+ ARM64 Linux glibc 2.28+ ARM64 abi3 |
|
SHA-256 checksum How to use checksums |
18fcf39ea00f9156c3bdbe81c5cf56c75abf99ac0f90565512fc6bf19718f9c7
|
|
BLAKE2b-256 checksum How to use checksums |
035643ffef69d043bfd5d7a1e4726d9b144380adbe1549df137adacc2620ccef
|
| 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-1.43.0-cp312-abi3-macosx_13_0_x86_64.whl
| Download URL | openscad_cpp_evaluator-1.43.0-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 |
4af9fc36973df79526f52bd92ac8a616a5fce12e0a6a3f7a53864367030f53a2
|
|
BLAKE2b-256 checksum How to use checksums |
523871a589b4341428faa573e2e51fbabc5007214a26ba00c58ad732239f026f
|
| 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-1.43.0-cp312-abi3-macosx_13_0_arm64.whl
| Download URL | openscad_cpp_evaluator-1.43.0-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 |
3e9f3f4641b2560bc5f0f0a8c7dffaa147af3254a194c7367e7fc579c1d06bb2
|
|
BLAKE2b-256 checksum How to use checksums |
90cc959eecc819b45897a06d25c7bb50e3b7d6c51d9649a653fa44fa8434e00f
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
