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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2001, 2002, 2003 Stphane Del Pino
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: ScalarFunctionDomainCharacteristic.hpp,v 1.3 2006/10/28 12:26:54 delpinux Exp $
#ifndef SCALAR_FUNCTION_DOMAIN_CHARACTERISTIC_HPP
#define SCALAR_FUNCTION_DOMAIN_CHARACTERISTIC_HPP
#include <ScalarFunctionBase.hpp>
class Domain;
/**
* @file ScalarFunctionDomainCharacteristic.hpp
* @author Stephane Del Pino
* @date Thu Jul 20 01:09:47 2006
*
* @brief characteristic function of a domain @f$ \mathbf{1}_\Omega @f$
*
*/
class ScalarFunctionDomainCharacteristic
: public ScalarFunctionBase
{
private:
ConstReferenceCounting<Domain>
__domain; /**< @f$ \Omega @f$ */
/**
* Writes a function to a stream
*
* @param os an output stream
*
* @return os
*/
std::ostream& __put(std::ostream& os) const
{
os << "one({domain})";
return os;
}
public:
/**
* Evaluates the function
*
* @param X position of evaluation
*
* @return 1 if @f$ x\in\Omega @f$, 0 elsewhere
*/
real_t operator()(const TinyVector<3,real_t>& X) const;
/**
* Checks if the function can be simplified
*
* @return false
*/
bool canBeSimplified() const
{
return false;
}
/**
* Constructor
*
* @param domain @f$ \Omega @f$
*/
ScalarFunctionDomainCharacteristic(ConstReferenceCounting<Domain> domain);
/**
* Copy constructor
*
* @param f original function
*/
ScalarFunctionDomainCharacteristic(const ScalarFunctionDomainCharacteristic& f);
/**
* Destructor
*
*/
~ScalarFunctionDomainCharacteristic();
};
#endif // SCALAR_FUNCTION_DOMAIN_CHARACTERISTIC_HPP
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