sizefield.h

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#ifndef OPENSWMMVIS_MESH_SIZEFIELD_H
#define OPENSWMMVIS_MESH_SIZEFIELD_H
 
#include "mesh/meshgenerator.h"
 
#include <QRectF>
#include <QVector>
 
namespace mesh {
 
struct SizeFieldOptions
{
    double nearSize = 0.0;
 
    double gradation = 0.25;
 
    double areaFloor = 0.0;
 
    qint64 maxGridCells = 4'000'000;
 
    bool   terrainDensity = false;
};
 
class SizeField
{
public:
    bool build(const QRectF &bbox,
               const QVector<ConstraintSegment>  &segs,
               const QVector<QVector<QPointF>>   &rings,
               const QVector<SteinerPoint>       &pts,
               const SizeFieldOptions &opt);
 
    [[nodiscard]] double targetAreaAt(double x, double y) const;
 
    [[nodiscard]] bool   isValid() const { return m_cols > 0 && m_rows > 0; }
    [[nodiscard]] double pitch()   const { return m_pitch; }
    [[nodiscard]] int    cols()    const { return m_cols; }
    [[nodiscard]] int    rows()    const { return m_rows; }
 
    [[nodiscard]] double distanceAt(double x, double y) const;
 
    [[nodiscard]] double terrainSizeAt(double x, double y) const;
 
private:
    [[nodiscard]] double cellDist(int cx, int cy) const;
    [[nodiscard]] double cellTerrain(int cx, int cy) const;
    void stampSeedPoint(const QPointF &p);
    void stampSeedSegment(const QPointF &a, const QPointF &b);
 
    QVector<float> m_dist;      
    QVector<float> m_hTerrain;  
    int    m_cols = 0, m_rows = 0;
    double m_x0 = 0.0, m_y0 = 0.0;   
    double m_pitch = 0.0;
    double m_near = 0.0, m_g = 0.0, m_floor = 0.0;
};
 
} // namespace mesh
 
#endif // OPENSWMMVIS_MESH_SIZEFIELD_H