ActiveSetData.hpp

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#ifndef OPENSWMM_ENGINE_2D_ACTIVE_SET_DATA_HPP
#define OPENSWMM_ENGINE_2D_ACTIVE_SET_DATA_HPP
 
#include <cstdint>
#include <vector>
 
namespace openswmm::twoD {
 
struct ActiveSetData {
    bool   enabled       = false;  
    int    halo_rings    = 2;      
    double wet_depth_eps = 0.0;    

    static constexpr uint8_t kInactive = 255;
    std::vector<uint8_t> cell_ring;
    std::vector<uint8_t> cell_active;
    std::vector<uint8_t> vert_active;
 
    // Compact ascending index lists rebuilt each advance (cache-friendly
    // iteration; OpenMP schedules over these instead of branch-per-cell).
    std::vector<int> active_cells;
    std::vector<int> active_verts;
    std::vector<int> outer_ring_cells;
 
    // Diagnostics (cumulative over the run).
    long rebuild_count   = 0;
    long halo_trip_count = 0;   
    int  n_seed          = 0;   
 
    int n_active() const noexcept { return static_cast<int>(active_cells.size()); }

    void resize(int nt, int nv) {
        cell_ring.assign(static_cast<std::size_t>(nt), kInactive);
        cell_active.assign(static_cast<std::size_t>(nt), 0);
        vert_active.assign(static_cast<std::size_t>(nv), 0);
        active_cells.clear();
        active_verts.clear();
        outer_ring_cells.clear();
    }
};
 
} // namespace openswmm::twoD
 
#endif // OPENSWMM_ENGINE_2D_ACTIVE_SET_DATA_HPP