meshcrossfield.h

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#ifndef OPENSWMMVIS_MESH_MESHCROSSFIELD_H
#define OPENSWMMVIS_MESH_MESHCROSSFIELD_H
 
#include <QPointF>
#include <QRectF>
#include <QVector>
 
namespace mesh {
 
class CrossField
{
public:
    struct Options
    {
        double pitch     = 0.0;    
        int    maxSweeps = 4000;   
        double tol       = 1e-5;   
        double omega     = 1.7;    
        double margin    = 2.0;    
    };
 
    CrossField() = default;
 
    bool build(const QRectF &bbox, const QVector<QVector<QPointF>> &alignedPolylines,
               const Options &opts);
 
    void setConstant(double thetaDeg);
 
    bool valid() const noexcept { return m_valid; }
    int  cols()  const noexcept { return m_cols; }
    int  rows()  const noexcept { return m_rows; }
    int  sweepsUsed() const noexcept { return m_sweeps; }
 
    double thetaAt(double x, double y) const;
 
    void directionsAt(double x, double y, QPointF d[4]) const;
 
    QPointF cellU(int col, int row) const;
    bool    cellPinned(int col, int row) const;
 
private:
    bool    m_valid = false;
    bool    m_constant = false;
    double  m_constTheta = 0.0;
    int     m_cols = 0, m_rows = 0, m_sweeps = 0;
    double  m_x0 = 0.0, m_y0 = 0.0, m_pitch = 0.0;   
    QVector<double> m_ux, m_uy;                       
    QVector<bool>   m_pinned;
};
 
} // namespace mesh
 
#endif // OPENSWMMVIS_MESH_MESHCROSSFIELD_H