This is a requirement of OpenSCAD now, needed to update to a working nightly.
You an also see it on my cvsweb or anoncvs checkout: https://cvs.afresh1.com/cgi-bin/cvsweb/mystuff-openscad/ $ cvs -d [email protected]:/cvs co mystuff-openscad Comments, OK to import? Manifold is a geometry library dedicated to creating and operating on manifold triangle meshes. A manifold mesh is a mesh that represents a solid object, and so is very important in manufacturing, CAD, structural analysis, etc. Manifold also supports arbitrary vertex properties and enables mapping of materials for rendering use-cases. Our primary goal is reliability: guaranteed manifold output without caveats or edge cases. Our secondary goal is performance: efficient algorithms that make extensive use of parallelization, or pipelining when only a single thread is available.
manifold-3.2.1.tar.gz
Description: application/tar-gz
