parse_tlaw.cpp

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/* This file is part of Cloudy and is copyright (C)1978-2013 by Gary J. Ferland and
 * others.  For conditions of distribution and use see copyright notice in license.txt */
/*ParseTLaw parse parameters on the tlaw command to set temperature as function of depth,
 * currently only does Bertoldi & Draine simple T law */

/* Despite outward appearances, this routine has no connection whatsoever with
   Bassetlaw (http://www.bassetlawmuseum.org.uk/) */

#include "cddefines.h"
#include "thermal.h"
#include "parser.h"

void ParseTLaw( Parser &p )
{
        DEBUG_ENTRY( "ParseTLaw()" );

        /* this says that some type of temperature law has been specified */
        thermal.lgTLaw = true;
        thermal.lgTemperatureConstant = true;
        thermal.lgTemperatureConstantCommandParsed = true;

        if( p.nMatch("DB96") )
        {
                /* this is to simulate the temperature law given by equation 41 in 
                 * >>refer      H2      temperature law Draine, B.T., & Bertoldi, Frank, 1996, ApJ, 468, 269-289 */
                thermal.lgTeBD96 = true;

                /* this is the initial temperature for the BD96 temperature law */
                thermal.T0BD96 = 500.f;
                TempChange(thermal.T0BD96 , false);

                /* the coefficient on column density for temp dropoff */
                thermal.SigmaBD96 = 6e-22f;
        }
        else if( p.nMatch("SN99") )
        {
                /* this is to simulate the temperature law given by equation 16 in 
                 * >>refer      H2      temperature law Sternberg, A., & Neufeld, D.A. 1999, ApJ, 516, 371-380 */
                thermal.lgTeSN99 = true;

                /* this is the inital temperature for the BD96 temperature law */
                thermal.T0SN99 = 500.f;
                TempChange(thermal.T0SN99 , false);
        }
        else
        {
                fprintf(ioQQQ," There must be a keyword on this command.  The one I know about is BD96\n");
                cdEXIT(EXIT_FAILURE);
        }

#if 0
#include "dense.h"
#include "optimize.h"
#include "input.h"
        bool lgEnd;
        long int j;
        /* all remainder is currently dead code, a copy of DLAW command,
         * which could be activated if needs arose */
        /* call fcn dense_fabden(RADIUS) which uses the ten parameters
         * N.B.; existing version of dense_fabden must be deleted
         * >>chng 96 nov 29, added table option */
        if( p.nMatch("TABL") )
        {
                /* when called, read in densities from input stream */
                strcpy( dense.chDenseLaw, "DLW2" );
                if( p.nMatch("DEPT") )
                {
                        dense.lgDLWDepth = true;
                }
                else
                {
                        dense.lgDLWDepth = false;
                }

                p.getline();
                dense.frad[0] = (realnum)p.FFmtRead();
                dense.fhden[0] = (realnum)p.FFmtRead();
                if( p.lgEOL() )
                {
                        fprintf( ioQQQ, " No pairs entered - can\'t interpolate.\n Sorry.\n" );
                        cdEXIT(EXIT_FAILURE);
                }

                dense.nvals = 2;
                lgEnd = false;

                /* read pairs of numbers until we find line starting with END */
                while( !lgEnd && dense.nvals < LIMTABDLAW )
                {
                        p.getline();
                        lgEnd = p.m_lgEOF;
                        if( !lgEnd )
                        {
                                if( p.strcmp("END") == 0 )
                                        lgEnd = true;
                        }

                        if( !lgEnd )
                        {
                                dense.frad[dense.nvals-1] = (realnum)p.FFmtRead();
                                dense.fhden[dense.nvals-1] = (realnum)p.FFmtRead();
                                dense.nvals += 1;
                        }
                }
                --dense.nvals;

                for( i=1; i < dense.nvals; i++ )
                {
                        /* the radius values are assumed to be strictly increasing */
                        if( dense.frad[i] <= dense.frad[i-1] )
                        {
                                fprintf( ioQQQ, " density.in radii must be in increasing order\n" );
                                cdEXIT(EXIT_FAILURE);
                        }
                }
        }
        else
        {
                /* this is usual case, call dense_fabden to get density */
                for( j=0; j < 10; j++ )
                {
                        dense.DensityLaw[j] = p.FFmtRead();
                }

                /* set flag so we know which law to use later */
                strcpy( dense.chDenseLaw, "DLW1" );

                /* vary option */
                if( optimize.lgVarOn )
                {
                        /* NB - there are 5 = LIMEXT numbers on this line - if LIMEXT ever changes,
                         * chnage this too */
                        strcpy( optimize.chVarFmt[optimize.nparm], "DLAW %f %f %f %f %f " );

                        /* index for where to write */
                        optimize.nvfpnt[optimize.nparm] = input.nRead;
                        for( j=0; j<LIMEXT; ++j )
                        {
                                optimize.vparm[j][optimize.nparm] = (realnum)dense.DensityLaw[j];
                        }
                        optimize.vincr[optimize.nparm] = 0.5;
                        optimize.nvarxt[optimize.nparm] = LIMEXT;
                        ++optimize.nparm;
                }
        }
#       endif
        return;
}