boundaryPatchMixin.hpp

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// SPDX-FileCopyrightText: 2023 - 2025 NeoN authors
//
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include "NeoN/mesh/unstructured/unstructuredMesh.hpp"
 
namespace NeoN::finiteVolume::cellCentred
{
 
class BoundaryPatchMixin
{
 
public:
 
    BoundaryPatchMixin() {}
 
    virtual ~BoundaryPatchMixin() = default;
 
    BoundaryPatchMixin(const UnstructuredMesh& mesh, localIdx patchID)
        : patchID_(patchID), start_(mesh.boundaryMesh().offset()[static_cast<size_t>(patchID_)]),
          end_(mesh.boundaryMesh().offset()[static_cast<size_t>(patchID_) + 1])
    {}
 
    BoundaryPatchMixin(localIdx start, localIdx end, localIdx patchID)
        : patchID_(patchID), start_(start), end_(end)
    {}
 
    localIdx patchStart() const { return start_; };
 
    localIdx patchEnd() const { return start_; };
 
    localIdx patchSize() const { return end_ - start_; }
 
    localIdx patchID() const { return patchID_; }
 
    std::pair<localIdx, localIdx> range() const { return {start_, end_}; }
 
protected:
 
    localIdx patchID_; 
    localIdx start_;   
    localIdx end_;     
};
}