pub fn enclosed_volume(triangles: &[StlTriangle]) -> f64Expand description
The volume triangles, wound outward, enclose: the sum of the signed
tetrahedra they span with a corner of the mesh, negative if they are
wound in. Exact for a closed mesh, up to its f32 corners.
The apex is a corner of the mesh, not the origin: in f32, a corner
far from the origin is rounded by more than the mesh’s own size there,
and the tetrahedra spanned from the origin weigh that rounding by their
distance: a plate at (10000, -5000, 2000) summed from the origin came
out 5.5 over for a bore of 142, back when faces met in two polygons of
an edge a sliver apart.