QgsGraphBuilderInterface class
Determine interface for creating a graph.
Contents
Contains the settings of the graph. QgsGraphBuilder and QgsGraphDirector both use a "builder" design pattern
Derived classes
- class QgsGraphBuilder
- This class used for making the QgsGraph object.
Constructors, destructors, conversion operators
- QgsGraphBuilderInterface(const QgsCoordinateReferenceSystem& crs, bool ctfEnabled = true, double topologyTolerance = 0.0, const QString& ellipsoidID = "WGS84")
- Default constructor.
Public functions
- void addEdge(int pt1id, const QgsPointXY& pt1, int pt2id, const QgsPointXY& pt2, const QVector<QVariant>& strategies) virtual
- Add edge to the graph.
- void addVertex(int id, const QgsPointXY& pt) virtual
- Add vertex to the graph.
- auto coordinateTransformationEnabled() -> bool
- Returns coordinate transformation enabled.
- auto destinationCrs() const -> QgsCoordinateReferenceSystem
- Returns destinaltion CRS.
- auto distanceArea() -> QgsDistanceArea*
- Returns measurement tool.
- auto topologyTolerance() -> double
- Returns topology tolerance.
Function documentation
QgsGraphBuilderInterface::
Default constructor.
| Parameters | |
|---|---|
| crs | Coordinate reference system for new graph vertex |
| ctfEnabled | enable coordinate transform from source graph CRS to CRS graph |
| topologyTolerance | sqrt distance between source point as one graph vertex |
| ellipsoidID | ellipsoid for edge measurement |
void QgsGraphBuilderInterface::
Add edge to the graph.
| Parameters | |
|---|---|
| pt1id | first vertex identificator |
| pt1 | first vertex coordinates |
| pt2id | second vertex identificator |
| pt2 | second vertex coordinates |
| strategies | optimization strategies |
void QgsGraphBuilderInterface::
Add vertex to the graph.
| Parameters | |
|---|---|
| id | vertex identifier |
| pt | vertex coordinates |