solvecraft

mirror of https://github.com/bherbruck/solidcraft.git synced 2026-11-07 20:41:50 +00:00

Files

T

wckdboy 743accca7a Triangulation: split a crossing boundary segment ourselves, never in spade's assert (#4031 ) (#5409 )

* claim: #4031

* Triangulation: split a crossing boundary segment ourselves, never in spade's assert (#4031)

A trimmed face's boundary segment that crosses a constraint already in the
triangulation went to spade's add_constraint_and_split, which asserts
(cdt.rs:978, `!previous_region.is_empty() || from == final_vertex`) when a
split lands so near another vertex or constraint that the piece up to it is
blocked. The kernel guard caught it, but the whole operation failed and a
crash report was written; a STEP body imported empty or not at all (#4598,
also #4293, #4478, #5068, #5229).

PolyBoundary::add_constraints now adds every segment that can be added, then
splits each blocked one itself: a vertex at each crossing, inserted from the
crossed edge's own vertex, and the pieces between added where they can be. A
segment with crowded or very many crossings, or a face with more than four
blocked segments (a rim that runs back and forth across itself), leaves them
out, as truck did before #1653, so the face meshes slightly off instead of
not at all. Pinched faces (#1648) still split where they cross.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>