Function proj_trans_array

ThirdParty/libproj/vtklibproj/src/4D_api.cpp:386–427

/

/*****************************************************************************/
int proj_trans_array (PJ *P, PJ_DIRECTION direction, size_t n, PJ_COORD *coord) {
/******************************************************************************
    Batch transform an array of PJ_COORD.

    Performs transformation on all points, even if errors occur on some points.

    Individual points that fail to transform will have their components set to
    HUGE_VAL

    Returns 0 if all coordinates are transformed without error, otherwise
    returns a precise error number if all coordinates that fail to transform
    for the same reason, or a generic error code if they fail for different
    reasons.
******************************************************************************/
    size_t i;
    int retErrno = 0;
    bool hasSetRetErrno = false;
    bool sameRetErrno = true;

    for (i = 0;  i < n;  i++) {
        proj_context_errno_set(P->ctx, 0);
        coord[i] = proj_trans (P, direction, coord[i]);
        int thisErrno = proj_errno(P);
        if( thisErrno != 0 )
        {
            if( !hasSetRetErrno )
            {
                retErrno = thisErrno;
                hasSetRetErrno = true;
            }
            else if( sameRetErrno && retErrno != thisErrno )
            {
                sameRetErrno = false;
                retErrno = PROJ_ERR_COORD_TRANSFM;
            }
        }
   }

   proj_context_errno_set(P->ctx, retErrno);

   return retErrno;
}