TrianglesMeshReader.hpp

/*

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 * Redistributions of source code must retain the above copyright notice,
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 * Redistributions in binary form must reproduce the above copyright notice,
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   software without specific prior written permission.

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*/


#ifndef _TRIANGLESMESHREADER_HPP_
#define _TRIANGLESMESHREADER_HPP_

#include <vector>
#include <string>
#include <fstream>
#include "AbstractMeshReader.hpp"

template<unsigned ELEMENT_DIM, unsigned SPACE_DIM>
class TrianglesMeshReader : public AbstractMeshReader<ELEMENT_DIM,SPACE_DIM>
{

    friend class TestTrianglesMeshReader;//for testing

private:

    bool mIndexFromZero;            
    std::string mFilesBaseName;     
    std::ifstream mNodesFile;       
    std::ifstream mElementsFile;    
    std::ifstream mFacesFile;       
    std::ifstream mNclFile;         
    std::ifstream mCableElementsFile; 
    std::streampos mNodeFileDataStart; 
    std::streamoff mNodeItemWidth;  
    std::streampos mElementFileDataStart; 
    std::streamoff mElementItemWidth;  
    std::streampos mFaceFileDataStart; 
    std::streamoff mFaceItemWidth;  
    std::streampos mNclFileDataStart; 
    std::streamoff mNclItemWidth;  
    unsigned mNumNodes;             
    unsigned mNumElements;          
    unsigned mNumFaces;             
    unsigned mNumCableElements;     
    unsigned mNodesRead;            
    unsigned mElementsRead;         
    unsigned mCableElementsRead;    
    unsigned mFacesRead;            
    unsigned mBoundaryFacesRead;    
    std::vector<unsigned> mOneDimBoundary; 
    unsigned mNumNodeAttributes;    
    std::vector<double> mNodeAttributes; 
    unsigned mMaxNodeBdyMarker;     
    unsigned mNumElementNodes;      
    unsigned mNumElementAttributes; 
    unsigned mNumFaceAttributes;    
    unsigned mNumCableElementAttributes; 
    unsigned mOrderOfElements;      
    unsigned mOrderOfBoundaryElements; 
    unsigned mNodesPerElement;      
    unsigned mNodesPerBoundaryElement; 
    unsigned mMaxContainingElements; 
    bool mEofException; 
    bool mReadContainingElementOfBoundaryElement; 
    bool mFilesAreBinary; 
    bool mMeshIsHexahedral; 
    bool mNclFileAvailable; 
    char* mNodeFileReadBuffer; 
    char* mElementFileReadBuffer; 
    char* mFaceFileReadBuffer; 
    bool mNodePermutationDefined; 
    std::vector<unsigned> mPermutationVector; 
    std::vector<unsigned> mInversePermutationVector; 
//    /** The containing element for each boundary element (obtaining by doing tetgen with the -nn flag).
//     *  In a std::vector rather than the struct to save space if not read.
//     */
//    std::vector<unsigned> mContainingElementsOfBoundaryElement;
//
//    unsigned mIndexIntoContainingElementsVector; /**< Which index to use when GetNextContainingElementOfBoundaryElement() is called */

public:

    TrianglesMeshReader(std::string pathBaseName,
                        unsigned orderOfElements=1,
                        unsigned orderOfBoundaryElements=1,
                        bool readContainingElementsForBoundaryElements=false);

     ~TrianglesMeshReader();

    unsigned GetNumElements() const;

    unsigned GetNumNodes() const;

    unsigned GetNumFaces() const;

    unsigned GetNumCableElements() const;

    unsigned GetNumElementAttributes() const;

    unsigned GetNumFaceAttributes() const;

    unsigned GetNumCableElementAttributes() const;

    void Reset();

    std::vector<double> GetNextNode();

    ElementData GetNextElementData();

    ElementData GetNextFaceData();

    ElementData GetNextCableElementData();


    unsigned GetOrderOfElements()
    {
        return mOrderOfElements;
    }
    unsigned GetOrderOfBoundaryElements()
    {
        return mOrderOfBoundaryElements;
    }

    bool GetReadContainingElementOfBoundaryElement()
    {
        return mReadContainingElementOfBoundaryElement;
    }

    std::vector<double> GetNodeAttributes();

    std::vector<double> GetNode(unsigned index);

    ElementData GetElementData(unsigned index);

    ElementData GetFaceData(unsigned index);

    std::vector<unsigned> GetContainingElementIndices(unsigned index);


    /*** Returns true if reading binary files, false if reading ascii files */
    bool IsFileFormatBinary();

    bool HasNclFile();

    void SetReadBufferSize(unsigned bufferSize);

    void SetNodePermutation(std::vector<unsigned>& rPermutationVector);

private:

    void OpenFiles();

    void OpenNodeFile();

    void OpenElementsFile();

    void OpenFacesFile();

    void OpenNclFile();

    void OpenCableElementsFile();

    void ReadHeaders();

    void CloseFiles();

    void GetNextLineFromStream(std::ifstream& rFileStream, std::string& rRawLine);

    template<class T_DATA, class T_ATTR>
    void GetNextItemFromStream(std::ifstream& rFileStream, unsigned expectedItemNumber,
                               std::vector<T_DATA>& rDataPacket, const unsigned& rNumAttributes,
                               std::vector<T_ATTR>& rAttributes);

    std::string GetMeshFileBaseName();

    void GetOneDimBoundary();

    void EnsureIndexingFromZero(std::vector<unsigned>& rNodeIndices);

};

#endif //_TRIANGLESMESHREADER_HPP_