/home66/gary/public_html/cloudy/c08_branch/source/cont_ipoint.cpp

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/* This file is part of Cloudy and is copyright (C)1978-2008 by Gary J. Ferland and
 * others.  For conditions of distribution and use see copyright notice in license.txt */
/*ipoint returns pointer to any energy within energy mesh */
/*ipFineCont returns array index within fine energy mesh */
/*ipContEnergy generate unique pointer to energy within continuum array
 * continuum energy in Rydbergs */
/*ipLineEnergy generate unique pointer to line energy within energy mesh
 * line energy in Rydbergs */
#include "cddefines.h"
#include "continuum.h"
#include "prt.h"
#include "rfield.h"
#include "ipoint.h"

/*ipoint returns pointer to any energy within energy mesh */
long ipoint(double energy_ryd)
{
        long int i, 
          ipoint_v;

        DEBUG_ENTRY( "ipoint()" );

        if( energy_ryd < continuum.filbnd[0] || energy_ryd > continuum.filbnd[continuum.nrange] )
        {
                fprintf( ioQQQ, " ipoint:\n" );
                fprintf( ioQQQ, " The energy_ryd array is not defined at nu=%11.3e. The bounds are%11.3e%11.3e\n", 
                  energy_ryd, continuum.filbnd[0], continuum.filbnd[continuum.nrange] );
                fprintf( ioQQQ, " ipoint is aborting to get trace, to find how this happened\n" );
                ShowMe();
                cdEXIT(EXIT_FAILURE);
        }

        for( i=0; i < continuum.nrange; i++ )
        {
                if( energy_ryd >= continuum.filbnd[i] && energy_ryd <= continuum.filbnd[i+1] )
                {

                        /* this is on the Fortran scale of array index counting, so is one above the
                         * c scale.  later the -1 will appear on any index references */
                        ipoint_v = (long int)(log10(energy_ryd/continuum.filbnd[i])/continuum.fildel[i] + 
                          1.0 + continuum.ifill0[i]);

                        ASSERT( ipoint_v >= 0 );
                        /* recall on F scale */
                        ipoint_v = MIN2( rfield.nupper , ipoint_v );
                        return ipoint_v;
                }
        }

        /* this exit not possible, here to shut up some compilers */
        fprintf( ioQQQ, " IPOINT logic error, energy=%.2e\n", 
          energy_ryd );
        cdEXIT(EXIT_FAILURE);
}

/*ipContEnergy generate unique pointer to energy within continuum array */
long ipContEnergy(
  /* continuum energy in Rydbergs */
  double energy, 
  /* 4 char label for continuum, like those returned by chLineLbl */
  const char *chLabel)
{
        long int ipConSafe_v;

        DEBUG_ENTRY( "ipContEnergy()" );

        ipConSafe_v = ipoint(energy);

        /* write label in this cell if not anything there yet */
        if( strcmp(rfield.chContLabel[ipConSafe_v-1],"    ") == 0 )
        {
                strcpy( rfield.chContLabel[ipConSafe_v-1], chLabel );
        }

        /* this is a quick way to find all continua that occur within a given cell,
         * recall the off-by-one aspect of C */
        {
                enum {DEBUG_LOC=false};
                if( DEBUG_LOC )
                {
                        /* recall the off-by-one aspect of C - the number below is
                         * on the physics scale because this returns the index
                         * on that scale, so the first is 1 for [0] */
                        if( ipConSafe_v == 23 )
                                fprintf(ioQQQ,"%s\n", chLabel );
                }
        }
        return ipConSafe_v;
}

/*ipLineEnergy generate unique pointer to line energy within energy mesh
 * line energy in Rydbergs -
 * return value is array index on the physics or Fortran scale, counting from 1 */
long ipLineEnergy(double energy, 
  /* 4 char label for  line, like those returned by chLineLbl */
  const char *chLabel , 
  /* will make sure energy is < this array index if greater than 0, does nothing if <= 0*/
  long ipIonEnergy )
{
        long int ipLine_ret;

        DEBUG_ENTRY( "ipLineEnergy()" );

        ipLine_ret = ipoint(energy);
        ASSERT( ipLine_ret );
        /* make sure pointer is below next higher continuum if positive */
        if( ipIonEnergy > 0 )
        {
                ipLine_ret = MIN2( ipLine_ret , ipIonEnergy-1 );
        }

        ASSERT( ipLine_ret > 0 );
        /* stuff in a label if none there,
         * note that this is offset one below actual number to be on C scale of arrays */
        /* >>chng 06 nov 23, faster to use line_count index rather than checking 5 chars 
         * first call will have zero so false */
        /*if( strcmp(rfield.chLineLabel[ipLine_ret-1],"    ")==0 )*/
        if( !rfield.line_count[ipLine_ret-1] )
        {
                strcpy( rfield.chLineLabel[ipLine_ret-1], chLabel );
        }
        /* this keeps track of the number of lines within this cell */
        ++rfield.line_count[ipLine_ret-1];

        /* this is a quick way to find all lines that occur within a given cell,
         * recall the off-by-one aspect of C */
        {
                enum {DEBUG_LOC=false};
                if( DEBUG_LOC )
                {
                        /* recall the off-by-one aspect of C - the numbers is one more 
                         * than the index on the C scale */
                        if( ipLine_ret == 23 )
                                fprintf(ioQQQ,"%s\n", chLabel );
                }
        }

        /* this implements the print continuum indices command */
        if( prt.lgPrtContIndices )
        {
                /* print header if first time */
                static bool lgFirst = true;
                if( lgFirst )
                {
                        /* print header and set flag so do not do again */
                        fprintf(ioQQQ , "\n\noutput from print continuum indices command follows.\n");
                        fprintf(ioQQQ , "cont ind (F scale)\tenergy(ryd)\tlabel\n");
                        lgFirst = false;
                }
                if( energy >= prt.lgPrtContIndices_lo_E && energy <= prt.lgPrtContIndices_hi_E )
                {
                        /* use varying formats depending on order of magnitude of energy 
                         * NB - the ipLine_ret is the index on the physical or Fortran scale,
                         * and is 1 greater than the array element used in the code, which is
                         * on the C scale */
                        if( energy < 1. )
                        {
                                fprintf(ioQQQ , "%li\t%.3e\t%s\n" , ipLine_ret , energy , chLabel);
                        }
                        else if( energy < 10. )
                        {
                                fprintf(ioQQQ , "%li\t%.3f\t%s\n" , ipLine_ret , energy , chLabel);
                        }
                        else if( energy < 100. )
                        {
                                fprintf(ioQQQ , "%li\t%.2f\t%s\n" , ipLine_ret , energy , chLabel);
                        }
                        else
                        {
                                fprintf(ioQQQ , "%li\t%.1f\t%s\n" , ipLine_ret , energy , chLabel);
                        }
                }
        }

        if( prt.lgPrnLineCell )
        {
                /* print line cell option - number on command line is cell on Physics scale */
                if( prt.nPrnLineCell == ipLine_ret )
                {
                        static bool lgMustPrintHeader = true;
                        if( lgMustPrintHeader )
                                fprintf(ioQQQ, "Lines within cell %li\n",prt.nPrnLineCell );
                        lgMustPrintHeader = false;
                        fprintf(ioQQQ,"**>%s<**\n" , chLabel );
                }
        }
        return ipLine_ret;
}

/*ipFineCont returns array index within fine energy mesh */
long ipFineCont(
        /* energy in Ryd */
        double energy_ryd )
{
        long int ipoint_v;

        DEBUG_ENTRY( "ipFineCont()" );

        if( energy_ryd < rfield.fine_ener_lo || energy_ryd > rfield.fine_ener_hi )
        {
                return -1;
        }

        /* this is on the Fortran scale of array index counting, so is one above the
         * c scale.  later the -1 will appear on any index references
         * 
         * 07 Jun 22 testing done to confirm that energy grid is correct:  did 
         * same sim with standard fine continuum resolution, and another with 200x
         * finer resolution, and confirmed that these line up correctly.  */
        ipoint_v = (long int)(log10(energy_ryd*(1.-rfield.fine_resol/2.) /
                rfield.fine_ener_lo)/log10(1.+rfield.fine_resol));

        ASSERT( ipoint_v >= 0 && ipoint_v< rfield.nfine_malloc );
        return ipoint_v;
}

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