depth_table.cpp

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/* This file is part of Cloudy and is copyright (C)1978-2022 by Gary J. Ferland and
 * others.  For conditions of distribution and use see copyright notice in license.txt */
#include "cddefines.h"

#include "depth_table.h"
#include "thirdparty.h"

double DepthTable::tabval(double r0, 
  double depth) const
{
        double tabden_v, 
          x;

        DEBUG_ENTRY( "DepthTable::tabval()" );
        /*interpolate on table of points for density with dlaw table command, by K Volk
         *each line is log radius and H density per cc. */

        /*begin sanity check */
        if( r0 <= 0. || depth <= 0. )
        {
                fprintf( ioQQQ, " dense_tabden called with insane depth, radius, =%10.2e%10.2e\n", 
                  depth, r0 );
        }
        /*end sanity check */

        /* interpolate on radius or depth? */
        if( lgDepth )
        {
                /* depth key appeared = we want depth */
                x = log10(depth);
        }
        else
        {
                /* use radius */
                x = log10(r0);
        }

        /* set to impossible value, will crash if not reset */
        tabden_v = -DBL_MAX;

        if( x < dist[0] || x >= dist[nvals-1] )
        {
                fprintf( ioQQQ, " requested radius outside range of dense_tabden\n" );
                fprintf( ioQQQ, " radius was%10.2e min, max=%10.2e%10.2e\n", 
                  x, dist[0], dist[nvals-1] );
                cdEXIT(EXIT_FAILURE);
        }
        else
        {
                tabden_v = linint(get_ptr(dist),get_ptr(val),nvals,x);
        }

        /* got it, now return value, not log of density */
        tabden_v = exp10(tabden_v);
        return( tabden_v );
}