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/*
fuzzylite (R), a fuzzy logic control library in C++.
Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
This file is part of fuzzylite.
fuzzylite is free software: you can redistribute it and/or modify it under
the terms of the FuzzyLite License included with the software.
You should have received a copy of the FuzzyLite License along with
fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
fuzzylite is a registered trademark of FuzzyLite Limited.
*/
#include "fl/term/Binary.h"
namespace fl {
Binary::Binary(const std::string& name, scalar start, scalar direction, scalar height)
: Term(name, height), _start(start), _direction(direction) { }
Binary::~Binary() { }
std::string Binary::className() const {
return "Binary";
}
Complexity Binary::complexity() const {
return Complexity().comparison(5).arithmetic(1);
}
scalar Binary::membership(scalar x) const {
if (Op::isNaN(x)) return fl::nan;
if (_direction > _start and Op::isGE(x, _start)) {
return Term::_height * 1.0;
}
if (_direction < _start and Op::isLE(x, _start)) {
return Term::_height * 1.0;
}
return Term::_height * 0.0;
}
std::string Binary::parameters() const {
return Op::join(2, " ", _start, _direction) +
(not Op::isEq(getHeight(), 1.0) ? " " + Op::str(getHeight()) : "");
}
void Binary::configure(const std::string& parameters) {
if (parameters.empty()) return;
std::vector<std::string> values = Op::split(parameters, " ");
std::size_t required = 2;
if (values.size() < required) {
std::ostringstream ex;
ex << "[configuration error] term <" << className() << ">"
<< " requires <" << required << "> parameters";
throw Exception(ex.str(), FL_AT);
}
setStart(Op::toScalar(values.at(0)));
setDirection(Op::toScalar(values.at(1)));
if (values.size() > required)
setHeight(Op::toScalar(values.at(required)));
}
void Binary::setStart(scalar minimum) {
this->_start = minimum;
}
scalar Binary::getStart() const {
return this->_start;
}
void Binary::setDirection(scalar direction) {
this->_direction = direction;
}
scalar Binary::getDirection() const {
return this->_direction;
}
Binary::Direction Binary::direction() const {
if (this->_direction > _start) return Positive;
if (this->_direction < _start) return Negative;
return Undefined;
}
Binary* Binary::clone() const {
return new Binary(*this);
}
Term* Binary::constructor() {
return new Binary;
}
}
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