* Honour IfcAxis2PlacementLinear Axis/RefDirection in the loft builder
make_loft() (src/ifcgeom/infra_sweep_helper.cpp), shared by
IfcSectionedSolidHorizontal and IfcSectionedSurface, mishandled a cross
section's IfcAxis2PlacementLinear in two ways:
1. A placement carrying Axis but no RefDirection was placed with a fixed
[e_y | e_z | e_x] world-axis permutation that ignored the directrix.
On any directrix not running along +X (e.g. a north-south road
pavement, or anywhere along a curve) the profile came out mis-oriented
or collapsed to a sliver.
2. When two adjacent CrossSectionPositions used direction vectors
inconsistently (a raked RefDirection at one, a plain Axis at the
other) make_loft() logged GEO 42, dropped the rotation for the whole
segment and squared every cap -- and in one configuration left the
sweep frame flipped, so OpenCASCADE failed to build the solid at all.
Now a small profile_basis() helper builds every cross section's frame the
same way: profile Y = Axis, profile normal = RefDirection, and -- when
RefDirection is absent -- profile normal = the directrix tangent, so the
section stays perpendicular to the path (buildingSMART IFC4.x-IF #147).
When the two bracketing placements ask for the same orientation the sweep
frame carries it, built against the curve. When they disagree the sweep
frame stays on the shared Axis (continuous with the neighbouring
consistent segments, so nothing flips) and each end's own authored
orientation is folded into its profile points via a change of basis, so
each end cap still lands exactly as authored while the body in between
keeps following the directrix. The all-equal and no-direction-vector
paths are unchanged.
The two mappings now also carry the raw RefDirection through on
cross_section, alongside the existing rotation matrix.
Adds C++ tests (a raked end logs no GEO 42; a directrix that does not run
along +X still lofts a full-size solid) and Python tests (uniform prism
raked at one end and square at the other; a north-south directrix keeps
its width; OffsetLateral/OffsetVertical are scaled by the model length
unit).
* Renames profile_rotations to profile_axis for consistency with profile_ref_directions
Rename header-scope aliases, enums, and helper types while retaining descriptive names where dropping the suffix would create a collision.
Generated with the assistance of an AI coding tool.
Apply the rename manifest, normalize serializer filenames to the classes they define, and update includes and CMake source lists.
Generated with the assistance of an AI coding tool.
Richard Brice