mesh::MeshTriangle Struct Reference

A cell in the mesh — a triangle or (since the engine's mixed tri-quad meshes, workplans/TRI_QUAD_MESHING_PLAN_2026-09-06.md) a convex quadrilateral — indices into MeshResult::vertices. More...

#include <meshresult.h>

Collaboration diagram for mesh::MeshTriangle:

Public Member Functions
bool	isQuad () const noexcept
int	vertexCount () const noexcept
int	vertex (int k) const noexcept
void	setVertex (int k, int v) noexcept
bool	hasVertex (int v) const noexcept

Public Attributes
int	v0 = 0
int	v1 = 0
int	v2 = 0
int	v3 = -1
	Fourth vertex of a quadrilateral; -1 = triangle.
QString	tag
double	mannings = std::numeric_limits<double>::quiet_NaN()
double	initDepth = std::numeric_limits<double>::quiet_NaN()

Detailed Description

A cell in the mesh — a triangle or (since the engine's mixed tri-quad meshes, workplans/TRI_QUAD_MESHING_PLAN_2026-09-06.md) a convex quadrilateral — indices into MeshResult::vertices.

The historical name is kept: every consumer that reads v0/v1/v2 still compiles, and a quad simply carries a fourth vertex v3 >= 0 (cyclic order, either orientation). Use vertexCount / vertex and the helpers in mesh/meshcellgeom.h (edgeEndpoints, edgeSlot, cellGeom) instead of hard-coding 3.

Engine contract (plans/2D_TRI_QUAD_MESH_PLAN_2026-09-06.md): cells are written triangles first, then quads ([2D_TRIANGLES] then [2D_QUADS]); local edge k has endpoints v[(k+1)nv], v[(k+2)nv] — for a triangle the old "edge opposite vertex" rule. MeshResult::triangles keeps the engine's cell order.

Member Function Documentation

hasVertex()

bool mesh::MeshTriangle::hasVertex ( int  v ) const

inlinenoexcept

isQuad()

bool mesh::MeshTriangle::isQuad ( ) const

inlinenoexcept

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setVertex()

void mesh::MeshTriangle::setVertex ( int  k, int  v  )

inlinenoexcept

vertex()

int mesh::MeshTriangle::vertex ( int  k ) const

inlinenoexcept

Vertex k (0..vertexCount()-1); -1 out of range.

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vertexCount()

int mesh::MeshTriangle::vertexCount ( ) const

inlinenoexcept

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Member Data Documentation

initDepth

double mesh::MeshTriangle::initDepth = std::numeric_limits<double>::quiet_NaN()

Initial water depth in m ([2D_TRIANGLES] INIT_DEPTH, written between MANNINGS_N and TAG). NaN = unset (column absent on load) — treated as the engine default 0 (dry) and omitted on write unless any triangle carries a depth or a tag (TAG position must stay unambiguous).

mannings

double mesh::MeshTriangle::mannings = std::numeric_limits<double>::quiet_NaN()

Manning's roughness ([2D_TRIANGLES] MANNINGS_N). NaN = unset, so the writer falls back to the caller's default (mesh generation uses a uniform value); a loaded mesh carries the per-triangle value.

tag

QString mesh::MeshTriangle::tag

Region tag (e.g. subcatchment ID); empty if untagged.

v0

int mesh::MeshTriangle::v0 = 0

v1

int mesh::MeshTriangle::v1 = 0

v2

int mesh::MeshTriangle::v2 = 0

v3

int mesh::MeshTriangle::v3 = -1

Fourth vertex of a quadrilateral; -1 = triangle.

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The documentation for this struct was generated from the following file:

• /home/runner/work/openswmm.gui/openswmm.gui/include/mesh/meshresult.h