casa6

#ifndef _ATM_OPACITY_H

#define _ATM_OPACITY_H

/*******************************************************************************

 * ALMA - Atacama Large Millimiter Array

 * (c) Instituto de Estructura de la Materia, 2009

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA

 *

 * "@(#) $Id: ATMOpacity.h Exp $"

 *

 * who       when      what

 * --------  --------  ----------------------------------------------

 * pardo     24/03/09  created

 */

​

#ifndef __cplusplus

#error "This is a C++ include file and cannot be used from plain C"

#endif

​

#include "ATMCommon.h"

#include <string>

​

​

​

ATM_NAMESPACE_BEGIN

​

/*! \brief Class for opacities [no dimensions]

 *

 *   This class is defined for opacities.

 *   Default units are np (Transmission=exp(-opacity)).

 */

class Opacity

{

public:

  enum Units {

    UnitDeciBel,

    UnitNeper,

    NumOpacityUnits

  };

​

  /** Default constructor: Opacity value set to 0 np */

  Opacity();

  /** A full constructor: value in default units (np) */

  Opacity(double opacity);

  /** A full constructor: value + units. Valid units are:  np [neper] [NP] [NEPER], db [DB]. */

  Opacity(double opacity, const std::string &units);

  Opacity(double opacity, Units units);

  /** Copy constructor */

  Opacity (const Opacity &opacity);

​

  /** Destructor */