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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: ScalarFunctionDerivative.cpp,v 1.3 2007/05/01 13:15:32 delpinux Exp $
#include <ScalarFunctionDerivative.hpp>
#include <ErrorHandler.hpp>
std::ostream&
ScalarFunctionDerivative::
__put(std::ostream& os) const
{
switch(__direction) {
case ScalarFunctionDerivative::x: {
os << "dx(";
break;
}
case ScalarFunctionDerivative::y: {
os << "dy(";
break;
}
case ScalarFunctionDerivative::z: {
os << "dz(";
break;
}
default: {
throw ErrorHandler(__FILE__,__LINE__,
"unknown derivative direction",
ErrorHandler::unexpected);
}
}
os << *__functionToDerive << ')';
return os;
}
real_t
ScalarFunctionDerivative::
operator()(const TinyVector<3, real_t>& X) const
{
switch(__direction) {
case ScalarFunctionDerivative::x: {
return __functionToDerive->dx(X);
}
case ScalarFunctionDerivative::y: {
return __functionToDerive->dy(X);
break;
}
case ScalarFunctionDerivative::z: {
return __functionToDerive->dz(X);
break;
}
default: {
throw ErrorHandler(__FILE__,__LINE__,
"unknown derivative direction",
ErrorHandler::unexpected);
}
}
return 0;
}
ScalarFunctionDerivative::
ScalarFunctionDerivative(const ScalarFunctionDerivative::Direction& direction,
ConstReferenceCounting<ScalarFunctionBase> functionToDerive)
: ScalarFunctionBase(ScalarFunctionBase::derivate),
__direction(direction)
{
switch(functionToDerive->type()) {
case ScalarFunctionBase::femfunction:
case ScalarFunctionBase::spectral: {
const ScalarFunctionBase* f = functionToDerive;
__functionToDerive = f;
break;
}
default:
if (functionToDerive->type() != ScalarFunctionBase::femfunction) {
std::stringstream errorMsg;
errorMsg << "cannot compute derivative of non discrete functions :-(\n";
errorMsg << "the function " << (*functionToDerive) << " is not of that kind"
<< std::ends;
throw ErrorHandler(__FILE__,__LINE__,
errorMsg.str(),
ErrorHandler::normal);
}
}
}
ScalarFunctionDerivative::
ScalarFunctionDerivative(const ScalarFunctionDerivative& f)
: ScalarFunctionBase(f),
__direction(f.__direction),
__functionToDerive(f.__functionToDerive)
{
;
}
ScalarFunctionDerivative::
~ScalarFunctionDerivative()
{
;
}
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