RemoveDisconnectedRegions.hpp

//---- GPL ---------------------------------------------------------------------
//
// Copyright (C)  Stichting Deltares, 2011-2023.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation version 3.
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// This program is distributed in the hope that it will be useful,
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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//------------------------------------------------------------------------------
 
#pragma once
#include <array>
#include <utility>
#include <vector>
 
#include "MeshKernel/Definitions.hpp"
#include "MeshKernel/Mesh2D.hpp"
#include "MeshKernel/UndoActions/UndoAction.hpp"
 
namespace meshkernel
{
    class RemoveDisconnectedRegions final
    {
    public:
        [[nodiscard]] std::unique_ptr<UndoAction> Compute(Mesh2D& mesh) const;
 
    private:
        UInt GetNeighbour(const std::array<UInt, 2>& edge, const UInt elementId) const;
 
        void LabelConnectedRegion(const Mesh2D& mesh, const UInt regionId, std::vector<UInt>& elementRegionId, const UInt unlabledElementId, UInt& elementCount) const;
 
        void LabelSingleDomainRegion(const Mesh2D& mesh, const UInt regionId, std::vector<UInt>& elementRegionId, UInt& elementCount) const;
 
        void LabelAllDomainRegions(const Mesh2D& mesh, std::vector<UInt>& elementRegionId, std::vector<std::pair<UInt, UInt>>& regionCount) const;
 
        [[nodiscard]] std::unique_ptr<UndoAction> RemoveDetachedRegions(Mesh2D& mesh, const UInt regionId, std::vector<UInt>& elementRegionId, UInt& numberOfElementsRemoved) const;
    };
 
} // namespace meshkernel