meshquadmerge.h File Reference

#include "mesh/meshresult.h"
#include <QPair>
#include <QSet>
#include <QVector>

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Classes
struct	mesh::QuadMergeOptions
	Acceptance thresholds for a merged quad. More...

Namespaces
namespace	mesh

Functions
QPair< int, int >	mesh::edgeKey (int a, int b) noexcept
	Unordered vertex-pair key used for locked edges: (min, max).
int	mesh::mergeTrianglePairs (MeshResult &mesh, const QuadMergeOptions &opts, const QSet< QPair< int, int > > &lockedEdges, QVector< int > *oldToNew=nullptr)
	Greedily merge adjacent triangle pairs of mesh into convex quads.

Detailed Description

Author

Caleb Buahin caleb.nosp@m..bua.nosp@m.hin@g.nosp@m.mail.nosp@m..com

Date

2026

License\n GPL-3.0-or-later

Tri-pair merge (workplans/TRI_QUAD_MESHING_PLAN_2026-09-06.md §3.1, phase G2). Post-processes a triangle mesh into a quad-dominant mixed mesh by greedily pairing adjacent triangles into convex quadrilaterals, best quality first. Unmatched triangles remain, so the output is mixed by nature. Never merges across a locked edge (breaklines, boundary segments, BC-carrying edges), across different region tags, or between cells whose hydraulic attributes differ.

Result cells follow the engine order — every remaining triangle first, then every quad — and the caller receives the old→new cell index map so any per-cell array it holds can be remapped.