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ENH: boost is_support_necessary's performance

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1. Parallelize the majority of overhang detection, leaving only a small
part of sharp tail detection as sequential. This strategy makes
is_support_necessary 10 times faster.
2. Use the overlaps function to detect overlapping, instead of using
intersection().empty()
3. Control the max recursion depth to prevent crashing due to too deep
recursion.

Jira: STUDIO-2445, STUDIO-2458
Change-Id: I35283da3e4a22d7afe251b804ce30b90a9d754df
(cherry picked from commit 1a6fedd1a0c82906f1807234ea1b816247ca6fd7)
This commit is contained in:
arthur.tang 2023-03-14 17:04:42 +08:00 • committed by Lane.Wei
parent 6f298ac6f1
commit 6c489808a7
5 changed files with 280 additions and 325 deletions
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2
src/libslic3r/ExPolygon.hpp
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@ -451,6 +451,8 @@ inline ExPolygons expolygons_simplify(const ExPolygons &expolys, double toleranc
// however their contours may be rotated.
bool expolygons_match(const ExPolygon &l, const ExPolygon &r);
bool overlaps(const ExPolygons& expolys1, const ExPolygons& expolys2);
BoundingBox get_extents(const ExPolygon &expolygon);
BoundingBox get_extents(const ExPolygons &expolygons);
BoundingBox get_extents_rotated(const ExPolygon &poly, double angle);