Esempi in C++ (Cpp) per OGRGeometry::empty

Esempio n. 1

File: ogrmultipoint.cpp Progetto: drownedout/datamap

OGRErr OGRMultiPoint::importFromWkt_Bracketed( char ** ppszInput, int bHasM, int bHasZ )

{

    char        szToken[OGR_WKT_TOKEN_MAX];
    const char  *pszInput = *ppszInput;
    OGRErr      eErr = OGRERR_NONE;

/* -------------------------------------------------------------------- */
/*      Skip MULTIPOINT keyword.                                        */
/* -------------------------------------------------------------------- */
    pszInput = OGRWktReadToken( pszInput, szToken );

    if (bHasZ || bHasM)
    {
        /* Skip Z, M or ZM */
        pszInput = OGRWktReadToken( pszInput, szToken );
    }

/* -------------------------------------------------------------------- */
/*      Read points till we get to the closing bracket.                 */
/* -------------------------------------------------------------------- */
    int                 nMaxPoint = 0;
    int                 nPointCount = 0;
    OGRRawPoint         *paoPoints = NULL;
    double              *padfZ = NULL;

    while( (pszInput = OGRWktReadToken( pszInput, szToken )) != NULL
           && (EQUAL(szToken,"(") || EQUAL(szToken,",")) )
    {
        OGRGeometry     *poGeom;

        const char* pszNext = OGRWktReadToken( pszInput, szToken );
        if (EQUAL(szToken,"EMPTY"))
        {
            poGeom = new OGRPoint(0,0);
            poGeom->empty();
            eErr = addGeometryDirectly( poGeom );
            if( eErr != OGRERR_NONE )
                return eErr;

            pszInput = pszNext;

            continue;
        }

        pszInput = OGRWktReadPoints( pszInput, &paoPoints, &padfZ, &nMaxPoint,
                                     &nPointCount );

        if( pszInput == NULL || nPointCount != 1 )
        {
            OGRFree( paoPoints );
            OGRFree( padfZ );
            return OGRERR_CORRUPT_DATA;
        }

        /* Ignore Z array when we have a MULTIPOINT M */
        if( padfZ && !(bHasM && !bHasZ))
            poGeom = new OGRPoint( paoPoints[0].x, 
                                   paoPoints[0].y, 
                                   padfZ[0] );
        else
            poGeom =  new OGRPoint( paoPoints[0].x, 
                                    paoPoints[0].y );

        eErr = addGeometryDirectly( poGeom );
        if( eErr != OGRERR_NONE )
            return eErr;
    }

/* -------------------------------------------------------------------- */
/*      Cleanup.                                                        */
/* -------------------------------------------------------------------- */
    OGRFree( paoPoints );
    if( padfZ )
        OGRFree( padfZ );

    if( !EQUAL(szToken,")") )
        return OGRERR_CORRUPT_DATA;

    *ppszInput = (char *) pszInput;
    
    return OGRERR_NONE;
}