meshrenderchunkindex.h File Reference

#include <QRectF>
#include <QVector>
#include <QtGlobal>

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Classes
class	OpenSWMM::Render::MeshRenderChunkIndex
struct	OpenSWMM::Render::MeshRenderChunkIndex::Chunk
struct	OpenSWMM::Render::MeshRenderChunkIndex::QueryResult

Namespaces
namespace	OpenSWMM
namespace	OpenSWMM::Render

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

QSG-2D-1M Phase 4 — chunked spatial index for RENDER batch decisions.

Separate from MeshSpatialGrid on purpose: that grid answers fine-grained point-pick / per-element cull queries; this index groups cells and edges into a few hundred coarse chunks so the renderers can classify whole batches per sync:

• chunks fully inside the view → iterate members with NO per-element bbox test,
• chunks straddling the view boundary → fall back to the existing per-element cull for just those members,
• chunks fully outside → skipped without touching a single element.

Membership is by bbox CENTRE, so every cell/edge id lives in exactly one chunk (no dedup pass needed when unioning chunk members). Chunk bboxes are the union of their members' bboxes, so a chunk bbox is always a superset of every member bbox — a chunk classified "fully inside" can safely skip member culling.

Chunk data depends only on the input bboxes: it is stable across pan and zoom and deterministic for deterministic input (locked by tests/unit/test_meshrenderchunkindex.cpp).

Pure Qt-Core class — no Qt Quick / Gui dependency.