MeshData.h

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//-------------------------------------------------------------------------------------------------------
// The MIT License (MIT)
//
// Copyright (c) 2021 Yoshiya Usui
//
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#ifndef DBLDEF_MESHDATA
#define DBLDEF_MESHDATA
 
#include <vector>
#include "CommonParameters.h"
 
// Class of FEM mesh for brick element
class MeshData{
 
public:
 
    enum BoundaryPlanes{
        YZMinus = 0,
        YZPlus,
        ZXMinus,
        ZXPlus,
        XYMinus,
        XYPlus,
    };
 
    enum MeshType{
        HEXA = 0,
        TETRA,
        NONCONFORMING_HEXA,
    };
 
    struct coordinateValue{
        double X;
        double Y;
        double Z;
    };
 
    struct coordinateValueXY{
        double X;
        double Y;
    };
 
    // Constructer
    MeshData();
 
    // Destructer
    virtual ~MeshData();
 
    // Input mesh data from "mesh.dat"
    virtual void inputMeshData() = 0;
 
    // Get tolal number of elements
    int getNumElemTotal() const;
 
    // Get tolal number of nodes
    int getNumNodeTotal() const;
 
    // Get total number of elements belonging to the boundary planes
    int getNumElemOnBoundaryPlanes( const int iPlane ) const;
 
    // Get X coordinates of node
    double getXCoordinatesOfNodes( const int iNode ) const;
 
    // Get Y coordinates of node
    double getYCoordinatesOfNodes( const int iNode ) const;
 
    // Get Z coordinates of node
    double getZCoordinatesOfNodes( const int iNode ) const;
 
    // Get ID of the Node composing specified element
    int getNodesOfElements( const int iElem, const int iNode ) const;
 
    // Get ID of the element belonging to the boundary planes
    int getElemBoundaryPlanes( const int iPlane, const int iElem ) const;
 
    // Get ID of neighbor Elements
    int getIDOfNeighborElement( const int iElem, const int num ) const;
 
    // Get number of neighbor elements of one element
    int getNumNeighborElement() const;
 
    // Get mesh type
    virtual int getMeshType() const = 0;
 
    // Calculate distance of two nodes
    double calcDistanceOfTwoNodes( const int nodeID0,  const int nodeID1 ) const;
 
    // Calculate horizontal distance of two nodes
    double calcHorizontalDistanceOfTwoNodes( const int nodeID0,  const int nodeID1 ) const;
 
    // Calculate distance of two nodes along X direction
    double caldDiffXOfTwoNodes( const int nodeID0,  const int nodeID1 ) const;
 
    // Calculate distance of two nodes along Y direction
    double caldDiffYOfTwoNodes( const int nodeID0,  const int nodeID1 ) const;
 
    // Calculate distance of two nodes along Z direction
    double caldDiffZOfTwoNodes( const int nodeID0,  const int nodeID1 ) const;
 
    // Decide whether specified elements share same nodes
    virtual bool shareSameNodes( const int elemID1, const int elemID2 ) const;
 
    // Calculate coordinate of the center of a specified element
    virtual CommonParameters::locationXYZ getCenterCoord( const int iElem ) const;
 
    // Calculate difference of the centers of the specified two element
    CommonParameters::locationXYZ calDiffOfCenters( const int iElem1, const int iElem2 ) const;
 
    // Decide whether specified elements share same edges
    virtual bool shareSameEdges( const int elemID1, const int elemID2 ) const = 0;
 
    // Get ID of the nodes of elements belonging to the boundary planes
    virtual int getNodesOfElementsBoundaryPlanes(  const int iPlane, const int iElem, const int iNode ) const = 0;
 
    // Calculate volume of a specified element
    virtual double calcVolume( const int elemID ) const = 0;
 
    // Output mesh data to VTK file
    virtual void outputMeshDataToVTK() const = 0;
 
    // Output mesh data to binary file
    virtual void outputMeshDataToBinary() const = 0;
 
    // Calculate area of face
    virtual double calcAreaOfFace( const int iElem, const int iFace ) const = 0;
 
    // Calculate area of face at bottom of mesh
    virtual double calcAreaOfFaceAtBottomOfMesh( const int iElem ) const = 0;
 
protected:
 
    // Copy constructer
    MeshData(const MeshData& rhs);
 
    // Copy assignment operator
    MeshData& operator=(const MeshData& rhs);
 
    // Total number of elements
    int m_numElemTotal;
 
    // Total number of nodes
    int m_numNodeTotal;
 
    // Number of nodes belonging to one element
    int m_numNodeOneElement;
 
    // Number of edges belonging to one element
    int m_numEdgeOneElement;
 
    // Number of nodes on a face of one element
    int m_numNodeOnFaceOneElement;
 
    // Number of neighbor elements of one element
    int m_numNeighborElement;
 
    // Total number of elements belonging to the boundary planes
    int m_numElemOnBoundaryPlanes[6];
 
    // Array of the X coordinates of nodes
    double* m_xCoordinatesOfNodes;
 
    // Array of the Y coordinates of nodes
    double* m_yCoordinatesOfNodes;
 
    // Array of the Z coordinates of nodes
    double* m_zCoordinatesOfNodes;
 
    // Array of IDs of neighbor Elements
    int* m_neighborElements;
 
    // Array of nodes composing each element
    int* m_nodesOfElements;
 
    // Array of elements belonging to the boundary planes
    //   m_elemBoundaryPlane[0] : Y-Z Plane ( Minus Side )
    //   m_elemBoundaryPlane[1] : Y-Z Plane ( Plus Side  )
    //   m_elemBoundaryPlane[2] : Z-X Plane ( Minus Side )
    //   m_elemBoundaryPlane[3] : Z-X Plane ( Plus Side  )
    //   m_elemBoundaryPlane[4] : X-Y Plane ( Minus Side )
    //   m_elemBoundaryPlane[5] : X-Y Plane ( Plus Side  )
    int* m_elemBoundaryPlanes[6];
 
    // Calculate distanceof two points
    double calcDistance( const CommonParameters::locationXY& point0,  const CommonParameters::locationXY& point1 ) const;
 
    // Function determine if the 1st segment contains the 2nd segment
    bool does1stSegmentContain2ndSegment( const CommonParameters::locationXY& startPointOf1stSegment, const CommonParameters::locationXY& endPointOf1stSegment,
        const CommonParameters::locationXY& startPointOf2ndSegment, const CommonParameters::locationXY& endPointOf2ndSegment ) const;
 
    // Function determine if two segments intersect or not
    bool intersectTwoSegments( const CommonParameters::locationXY& startPointOf1stSegment, const CommonParameters::locationXY& endPointOf1stSegment,
        const CommonParameters::locationXY& startPointOf2ndSegment, const CommonParameters::locationXY& endPointOf2ndSegment ) const;
 
    // Function determine if two lines overlap or not
    bool overlapTwoLines( const CommonParameters::locationXY& coord1stLine1, const CommonParameters::locationXY& coord1stLine2,
        const CommonParameters::locationXY& coord2ndLine1, const CommonParameters::locationXY& coord2ndLine2 ) const;
 
    // Function determine if two segments overlap or not
    bool overlapTwoSegments( const CommonParameters::locationXY& startPointOf1stSegment, const CommonParameters::locationXY& endPointOf1stSegment,
        const CommonParameters::locationXY& startPointOf2ndSegment, const CommonParameters::locationXY& endPointOf2ndSegment ) const;
 
    // Calculate inner product of two vectors
    double calcInnerProduct2D( const CommonParameters::locationXY& startCoordOf1stVec, const CommonParameters::locationXY& endCoordOf1stVec,
        const CommonParameters::locationXY& startCoordOf2ndVec, const CommonParameters::locationXY& endCoordOf2ndVec) const;
 
    // Calculate coordinates of intersection point of two lines
    void calcCoordOfIntersectionPointOfTwoLines( const CommonParameters::locationXY& coord1stLine1, const CommonParameters::locationXY& coord1stLine2,
        const CommonParameters::locationXY& coord2ndLine1, const CommonParameters::locationXY& coord2ndLine2, CommonParameters::locationXY& coordIntersectionPoint) const;
 
};
 
#endif