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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: ScalarFunctionNormal.hpp,v 1.3 2006/10/28 12:26:54 delpinux Exp $
#ifndef SCALAR_FUNCTION_NORMAL_HPP
#define SCALAR_FUNCTION_NORMAL_HPP
#include <ScalarFunctionBase.hpp>
/**
* @file ScalarFunctionNormal.hpp
* @author Stephane Del Pino
* @date Wed Jun 14 01:00:35 2006
*
* @brief This class is a simple normal component evaluating function
*
* This works using the @see NormalManager class
*
*/
class ScalarFunctionNormal
: public ScalarFunctionBase
{
public:
enum ComponentType
{
undefined,
x,
y,
z
};
private:
ComponentType __componentType; /**< The desired component */
/**
* Writes the function to a given stream
*
* @param os output stream
*
* @return os
*/
std::ostream& __put(std::ostream& os) const
{
switch(__componentType) {
case ScalarFunctionNormal::undefined: {
os << "[undefined normal]";
break;
}
case ScalarFunctionNormal::x: {
os << "nx";
break;
}
case ScalarFunctionNormal::y: {
os << "ny";
break;
}
case ScalarFunctionNormal::z: {
os << "nz";
break;
}
}
return os;
}
public:
/**
* Evaluates the normal a position @a X
*
* @param X position
*
* @note a boundary @b must be defined to evaluate the normal
*
* @return @f$ n_i(X) @f$
*/
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 normalType the desired component
*/
ScalarFunctionNormal(const ComponentType& normalType)
: ScalarFunctionBase(ScalarFunctionBase::normal),
__componentType(normalType)
{
;
}
/**
* Destructor
*
*/
~ScalarFunctionNormal()
{
;
}
};
#endif // SCALAR_FUNCTION_NORMAL_HPP
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