compas_manifold
Robust, guaranteed-manifold mesh boolean operations for COMPAS, powered by the Manifold library and bound with nanobind.
Manifold uses its own robust geometric predicates and always returns a valid, watertight, oriented 2-manifold — no exact kernel to opt into, no precision crashes on degenerate input.
Quickstart
Needs uv and a C++17 compiler. Manifold is fetched and compiled automatically — no extra setup.
git clone https://github.com/petrasvestartas/compas_manifold.git
cd compas_manifold
uv venv --python 3.12
source .venv/Scripts/activate # Git Bash on Windows (Linux/macOS: source .venv/bin/activate)
uv pip install nanobind "scikit-build-core[pyproject]" cmake ninja
uv pip install --no-build-isolation -ve ".[dev]"
python docs/examples/example_booleans.py
Run the tests with pytest tests. More options in
docs/installation.md.
Usage
from compas.geometry import Box, Sphere, Polyhedron
from compas_manifold.booleans import (
boolean_union_mesh_mesh,
boolean_difference_mesh_mesh,
boolean_intersection_mesh_mesh,
split_mesh_mesh,
)
A = Box(2).to_vertices_and_faces(triangulated=True)
B = Sphere(1.0, point=[1, 1, 1]).to_vertices_and_faces(u=32, v=32, triangulated=True)
V, F = boolean_difference_mesh_mesh(A, B)
shape = Polyhedron(V.tolist(), F.tolist())
Whole-pipeline booleans (evaluated in C++)
Keep every intermediate mesh inside C++ and only return the final result:
from compas_manifold.booleans import boolean_chain
# rounded, drilled cube: cube ∩ sphere − cyl_x − cyl_y − cyl_z
V, F = boolean_chain(
[cube, sphere, cyl_x, cyl_y, cyl_z],
["intersection", "difference", "difference", "difference"],
)
| Function | Description |
|---|---|
boolean_union_mesh_mesh(A, B) |
Union of two meshes |
boolean_difference_mesh_mesh(A, B) |
Difference A - B |
boolean_intersection_mesh_mesh(A, B) |
Intersection of two meshes |
split_mesh_mesh(A, B) |
Split A with B |
boolean_*_mesh_mesh_with_polygons(A, B) |
(V, F, P) with coplanar-face ids (merge triangles into n-gons) |
merge_coplanar_faces / coplanar_polygons / coplanar_outline_edges |
recover polygonal faces (with holes) & clean outlines |
boolean_chain(meshes, operations) |
Left-folded chain of ops, in C++ |
boolean_batch(meshes, operation) |
Single op over many meshes (BatchBoolean) |
boolean_chain_with_face_source(meshes, operations) |
Chain + per-face source tracking |
boolean_difference_mesh_meshes(A, Bs) |
Subtract many cutters from A in one batch |
Documentation
License
compas_manifold is released under the Apache License 2.0, matching the
Manifold library it wraps. See
LICENSE.
1 maintainer
Release files for compas-manifold 0.1.0
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|---|---|---|---|
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Built distributions (wheels)
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