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/**************************************************************************/
/* Copyright 2012 Tim Day */
/* */
/* This file is part of Evolvotron */
/* */
/* Evolvotron 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 3 of the License, or */
/* (at your option) any later version. */
/* */
/* Evolvotron 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 Evolvotron. If not, see <http://www.gnu.org/licenses/>. */
/**************************************************************************/
/*! \file
\brief Interfaces and implementation for specific Function classes.
As much as possible of the implementation should be pushed into the FunctionBoilerplate template.
*/
#ifndef _functions_arithmetic_h_
#define _functions_arithmetic_h_
#include "common.h"
#include "function_boilerplate.h"
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionAdd,0,2,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
return arg(0)(p)+arg(1)(p);
}
FUNCTION_END(FunctionAdd)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionMultiply,0,2,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
const XYZ v0(arg(0)(p));
const XYZ v1(arg(1)(p));
// NB Don't use v0*v1 as it would be cross-product.
return XYZ(v0.x()*v1.x(),v0.y()*v1.y(),v0.z()*v1.z());
}
FUNCTION_END(FunctionMultiply)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionDivide,0,2,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
const XYZ v0(arg(0)(p));
const XYZ v1(arg(1)(p));
return XYZ(
(v1.x()==0.0 ? 0.0 : v0.x()/v1.x()),
(v1.y()==0.0 ? 0.0 : v0.y()/v1.y()),
(v1.z()==0.0 ? 0.0 : v0.z()/v1.z())
);
}
FUNCTION_END(FunctionDivide)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionMax,0,2,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
const XYZ v0(arg(0)(p));
const XYZ v1(arg(1)(p));
return XYZ(
std::max(v0.x(),v1.x()),
std::max(v0.y(),v1.y()),
std::max(v0.z(),v1.z())
);
}
FUNCTION_END(FunctionMax)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionMin,0,2,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
const XYZ v0(arg(0)(p));
const XYZ v1(arg(1)(p));
return XYZ(
std::min(v0.x(),v1.x()),
std::min(v0.y(),v1.y()),
std::min(v0.z(),v1.z())
);
}
FUNCTION_END(FunctionMin)
//------------------------------------------------------------------------------------------
//! Function returning components of one function modulus thos of another.
/*! Sane always-positive modulus used to avoid funny business at zero.
*/
FUNCTION_BEGIN(FunctionModulus,0,2,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
const XYZ v0(arg(0)(p));
const XYZ v1(arg(1)(p));
return XYZ(
modulusf(v0.x(),fabs(v1.x())),
modulusf(v0.y(),fabs(v1.y())),
modulusf(v0.z(),fabs(v1.z()))
);
}
FUNCTION_END(FunctionModulus)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionExp,0,0,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
return XYZ(exp(p.x()),exp(p.y()),exp(p.z()));
}
FUNCTION_END(FunctionExp)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionSin,0,0,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
return XYZ(sin(p.x()),sin(p.y()),sin(p.z()));
}
FUNCTION_END(FunctionSin)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionCos,0,0,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
return XYZ(cos(p.x()),cos(p.y()),cos(p.z()));
}
FUNCTION_END(FunctionCos)
//------------------------------------------------------------------------------------------
#endif
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