MRSeparationPoint.h

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#pragma once
 
#include "MRId.h"
#include "MRVector3.h"
#include "MRVector.h"
#include "MRphmap.h"
#include <array>
 
namespace MR
{
 
 
enum class NeighborDir
{
    X, Y, Z, Count
};
 
using SeparationPointSet = std::array<VertId, size_t( NeighborDir::Count )>;
using SeparationPointMap = HashMap<size_t, SeparationPointSet>;

class SeparationPointStorage
{
public:
    struct alignas(64) Block
    {
        SeparationPointMap smap;
        std::vector<Vector3f> coords;
        VertId shift;

        VertId nextVid() const { return VertId( coords.size() ); }
 
        Triangulation tris;
        Vector<VoxelId, FaceId> faceMap;
    };

    MRMESH_API void resize( size_t blockCount, size_t blockSize );

    Block & getBlock( size_t blockIndex ) { return blocks_[blockIndex]; }

    MRMESH_API int makeUniqueVids();

    auto findSeparationPointSet( size_t voxelId ) const -> const SeparationPointSet *
    {
        const auto & map = blocks_[voxelId / blockSize_].smap;
        auto it = map.find( voxelId );
        return ( it != map.end() ) ? &it->second : nullptr;
    }

    MRMESH_API Triangulation getTriangulation( Vector<VoxelId, FaceId>* outVoxelPerFaceMap = nullptr ) const;

    MRMESH_API void getPoints( VertCoords & points ) const;
 
private:
    size_t blockSize_ = 0;
    std::vector<Block> blocks_;
};
 
}