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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.
*/
#ifndef _functions_friezegroup_spinsidle_h_
#define _functions_friezegroup_spinsidle_h_
#include "common.h"
#include "function_boilerplate.h"
#include "friezegroup.h"
//! Spinsidle (Conway pma2): Glide reflection with half rotation.
/*! Oscillate x, reflect y in alternate x cycles.
\verbatim
|oo| |oo|
| | | |
| | | |
| |
| |
|oo|
\endverbatim
*/
struct Spinsidle
{
const XY operator()(const XY& p) const
{
return XY
(
trianglef(p.x(),0.5),
modulusf(p.x()+0.5,2.0)<1.0 ? p.y() : -p.y()
);
}
};
struct SpinsidleInvariant;
struct SpinsidleBlend;
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionFriezeGroupSpinsidleFreeZ,0,1,false,FnStructure)
virtual const XYZ evaluate(const XYZ& p) const
{
return FriezegroupEvaluate(arg(0),p,Spinsidle(),FreeZ());
}
FUNCTION_END(FunctionFriezeGroupSpinsidleFreeZ)
//------------------------------------------------------------------------------------------
FUNCTION_BEGIN(FunctionFriezeGroupSpinsidleClampZ,1,1,false,FnStructure)
virtual const XYZ evaluate(const XYZ& p) const
{
return FriezegroupEvaluate(arg(0),p,Spinsidle(),ClampZ(param(0)));
}
FUNCTION_END(FunctionFriezeGroupSpinsidleClampZ)
//------------------------------------------------------------------------------------------
#endif
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