meshstagecache.h File Reference

#include "mesh/dtmthinner.h"
#include <QByteArray>
#include <QLoggingCategory>
#include <QPointF>
#include <QPolygonF>
#include <QRectF>
#include <QString>
#include <QVector>

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Classes
class	mesh::MeshStageCache
struct	mesh::MeshStageCache::FileIdentity
struct	mesh::MeshStageCache::BoundaryPrep
struct	mesh::MeshStageCache::TerrainPoints

Namespaces
namespace	mesh

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

Silent sidecar disk cache for the two expensive, rarely-changing stages of mesh generation, so parameter-tweaking re-runs skip minutes of recompute:

Stage A — prepared PSLG boundary: dissolved domains + prepared hole rings/seeds. Keyed by the boundary source identity (path + mtime + size + layer name, or a hash of the subcatchment vertices), both CRS WKTs, and the two ring-prep parameters. Stage B — terrain candidate points (DTM CRS, PRE-filter): the output of DTMThinner::generatePoints()/readPixels(). Keyed by the DEM identity + band + the thinning-relevant options + the sampled bbox. Poisson/boundary-filter/mesh-CRS parameters are deliberately NOT in the key — those passes are cheap and rerun on both paths, so tweaking them still hits the cache.

Entries live in <project dir>/.meshcache/ (sidecar convention, like .ovr and .oswp), one file per entry, written atomically via QSaveFile. Any read anomaly (bad magic/version/short read) is a miss. prune() keeps the newest N entries per stage. Keys embed a format-version salt, so bumping kFormatVersion invalidates everything at once.