tabmapobjarc.cpp

linux下一款GIS程序源码

// tabmapobjarc.cpp: implementation of the TABMAPObjArc class.
//
//////////////////////////////////////////////////////////////////////

#include "tabmapobjarc.h"

#include "ugk_errhandle.h"

/**********************************************************************
 *                   TABMAPObjArc::ReadObj()
 *
 * Read Object information starting after the object id
 **********************************************************************/
int TABMAPObjArc::ReadObj(TABMAPObjectBlock *poObjBlock)
{
//__TODO__  For now this is read directly in ReadGeometryFromMAPFile()
//          This will be implemented the day we support random update.
    return 0;
}

/**********************************************************************
 *                   TABMAPObjArc::WriteObj()
 *
 * Write Object information with the type+object id
 *
 * Returns 0 on success, -1 on error.
 **********************************************************************/
int TABMAPObjArc::WriteObj(TABMAPObjectBlock *poObjBlock)
{
    // Write object type and id
    TABMAPObjHdr::WriteObjTypeAndId(poObjBlock);

    poObjBlock->WriteInt16(m_nStartAngle);
    poObjBlock->WriteInt16(m_nEndAngle);
    
    // An arc is defined by its defining ellipse's MBR:
    poObjBlock->WriteIntMBRCoord(m_nArcEllipseMinX, m_nArcEllipseMinY, 
                                 m_nArcEllipseMaxX, m_nArcEllipseMaxY, 
                                 IsCompressedType());

    // Write the Arc's actual MBR
    poObjBlock->WriteIntMBRCoord(m_nMinX, m_nMinY, m_nMaxX, m_nMaxY, 
                                 IsCompressedType());

    poObjBlock->WriteByte(m_nPenId);      // Pen index

    if (UGKGetLastErrorNo() != 0)
        return -1;

    return 0;
}