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CAD mass properties: volume / area / centre of mass / inertia

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Port of snaporca c2821af783. New GeometryEngine::mass_properties over BRepGProp
(separate VolumeProperties/SurfaceProperties), bounds-checked
CadDocument::body_mass_properties, and a mass_properties MCP method. Query-only:
no CadFeature, no serialization, no version change. Analytic tests
(WithinRel/WithinAbs): cube 8000/2400/COM(0,0,10)/inertia 533333, cylinder
500pi/300pi, hollow = solid-500pi, invalid index -> valid=false.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q
This commit is contained in:
Tommaso Bianchi
2026-07-23 23:18:42 +02:00
co-authored by Claude Opus 4.8
parent 8edc12c8f1
commit b807be3c4a
6 changed files with 169 additions and 0 deletions
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src/libslic3r/CadDocument.cpp
+6
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@@ -1852,4 +1852,10 @@ bool CadDocument::export_step(const std::string& path,
return true;
}
GeometryEngine::MassProps CadDocument::body_mass_properties(int body_index) const
{
if (body_index < 0 || body_index >= int(bodies.size())) return {};
return GeometryEngine::mass_properties(bodies[body_index].shape);
}
} // namespace Slic3r