pub struct ImprintOptions {
pub tolerance: f64,
pub maximum_fit_points: usize,
pub local_fit: bool,
pub fit_chunk_points: Option<usize>,
pub maximum_ssi_step: Option<f64>,
pub span_budget: Option<f64>,
pub hermite_sections: bool,
pub tangent_curve_lane: bool,
pub exact_iso_pcurves: bool,
pub march_starts: bool,
pub two_radius_junctions: bool,
pub tangent_curve_imprint: bool,
}Fields§
§tolerance: f64§maximum_fit_points: usize§local_fit: bool§fit_chunk_points: Option<usize>§maximum_ssi_step: Option<f64>§span_budget: Option<f64>None, the default, marches exactly as before. BREP_SPAN_BUDGET
overrides either way: fit is the pair’s intersection_fit at the
operands’ scale, a number is an absolute budget, off is none.
BREP_SPAN_CENSUS=<file> appends one line per clipped section with its
stations, deviation and refine route (span-budget census:), labelled
by BREP_CENSUS_LABEL.
hermite_sections: boolImplies a span budget of the pair’s intersection_fit when none is
set. Off by default; BREP_HERMITE_SECTIONS overrides either way (0
off, anything else on).
tangent_curve_lane: boolThe TANGENT-CURVE lane: where an exact lane proves a pair’s transverse
intersection empty, or the tangential-only gate would skip it, and the
pair classification reads near-tangent, look for an EXTENDED contact
(crate::tangent_curve), march it with one planar carrier, and record it
as a typed tangent section (ImprintResultRecord::tangent_sections).
The boolean then names the contact in any refusal it raises on the pair
instead of leaking the arrangement’s own message. On by default since the
census of 2026-10-10 (every manifest leaf identical with the lane on and
off, hlr_tests green both ways); the section is recorded, never
imprinted, so nothing the boolean builds changes.
BREP_TANGENT_CURVE_LANE=0 is the escape hatch. Appended at the end of
the struct (2026-10-10).
exact_iso_pcurves: boolEXACT PCURVES FOR THE PLANAR-ISO LANE (slice 1, 2026-10-11, the
catalogue’s P3 applied to the exact lane): a section the planar-iso
lane answers is an iso-curve of the ruled carrier and an affine image
on the plane, so both pcurves are written down on the curve’s own
knots (support::planar_iso_section) instead of fitted, and the
junction pass moves their ends instead of re-marching them. Off by
default (the fitted pcurves are the shipped bytes);
BREP_EXACT_ISO_PCURVES overrides either way: 0/off, on, or
check, which fits as before and appends one census line per pcurve
comparing the fitted and the exact one in 3-D
(BREP_EXACT_ISO_CENSUS=<file>, labelled by BREP_CENSUS_LABEL). A
face read in a lifted chart declines the exact pcurve (the iso line
is in the carrier’s frame). Appended at the end of the struct.
march_starts: boolMARCH STARTS: every surface/surface march the imprint runs traces
its starts in order (explicit trim-boundary pierces first, the most
transverse first, a run-through start consumed with a snapped
station) and seeds its interior candidates from the two carriers’
knot-span leaves instead of a fixed grid
(SurfaceIntersectionOptions::ordered_starts,
SurfaceIntersectionOptions::tree_seeds). Off by default (the
grid-then-seeds march is the shipped one, byte for byte);
BREP_MARCH_STARTS overrides either way: 0/off, order (A3’s
ordering alone), snap (the ordering with run-through starts
consumed), tree (A4 alone), order+tree, anything else all three.
Appended at the end of the struct.
two_radius_junctions: boolCandidates for one junction are captured within the wide residual
band; two combine only when they are connected (share a support face)
and lie within the strict radius built from their own evidence radii;
the surviving position is the lowest-dimensional candidate’s, an
operand vertex over an operand edge’s crossing over a section end on
two carriers. Off by default until the census in the record promotes
it; BREP_JUNCTION_COMBINE overrides either way (0/off, check
for the census that logs every junction’s candidates to
BREP_JUNCTION_CENSUS without moving anything, anything else on).
Appended at the end of the struct (2026-10-11).
tangent_curve_imprint: boolIMPRINT THE TANGENT SECTION (the pinched result): a planar-carrier
contact the tangent-curve lane traced is also IMPRINTED —
process_curve on the clipped run, so the contact becomes a section
piece on both carriers, the operand edges its ends lie on are split
there, and every earlier piece the ends lie on (the through-bore’s cap
circles) is split at them — and its piece ids are recorded in
TangentSectionRecord::piece_ids. The boolean’s assembler then
pairs the four coedges of such a piece by MATERIAL SIDE (two edge
records on one locus, each manifold) instead of by arrival, so the
grazing through-bore builds as one shell whose tangent edge is carried
twice. On by default since the census of 2026-10-11 (the battery
moving only the pins that asserted the old refusal and the recentre
pin whose unguarded far fillet now completes);
BREP_TANGENT_CURVE_IMPRINT=0 is the escape hatch. Requires
tangent_curve_lane. Appended at the end of the struct (2026-10-11).