meshprofilesampler.h File Reference

Pure-logic sampler that turns a user-traced polyline across the 2D surface mesh into a longitudinal cross-section: cumulative chainage, ground elevation, current-frame water depth, and the max-depth envelope at evenly-spaced samples along the path. More...

#include "plot/profilesection.h"
#include <QPointF>
#include <QVector>

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Namespaces
namespace	MeshProfileSampler

Typedefs
using	MeshProfileSampler::Sample = ProfileSection::Sample
using	MeshProfileSampler::CellCrossing = ProfileSection::CellCrossing
using	MeshProfileSampler::MeshProfile = ProfileSection::Section

Functions
MeshProfile	MeshProfileSampler::buildMeshProfile (SWMM2DMeshLayer *mesh, SWMM2DResultsLayer *results, const QVector< QPointF > &scenePolyline, double stepHint=0.0)
	Resample scenePolyline at fixed arc length and sample ground / depth / max-depth along it.

Variables
constexpr int	MeshProfileSampler::kMaxSamples = ProfileSection::kMaxSamples

Detailed Description

Pure-logic sampler that turns a user-traced polyline across the 2D surface mesh into a longitudinal cross-section: cumulative chainage, ground elevation, current-frame water depth, and the max-depth envelope at evenly-spaced samples along the path.

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

Mirrors ProfileBuilder's "pre-fetch then assemble" decoupling, but queries the live layers directly (mesh for ground, results layer for depth) since the 2D mesh has no first-class path/topology object. The geometry-dependent columns (chainage / ground / triIdx / maxDepth) are static once traced; only depthNow changes per animation frame — recompute just that column via SWMM2DResultsLayer::depthAtSceneInterp on each tick (barycentric per-vertex depth, so the water-surface line stays smooth across cells).