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Diffstat (limited to 'fuzzylite/src/term/Trapezoid.cpp')
-rw-r--r-- | fuzzylite/src/term/Trapezoid.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/fuzzylite/src/term/Trapezoid.cpp b/fuzzylite/src/term/Trapezoid.cpp new file mode 100644 index 0000000..60abcc4 --- /dev/null +++ b/fuzzylite/src/term/Trapezoid.cpp @@ -0,0 +1,130 @@ +/* + Author: Juan Rada-Vilela, Ph.D. + Copyright (C) 2010-2014 FuzzyLite Limited + All rights reserved + + This file is part of fuzzylite. + + fuzzylite is free software: you can redistribute it and/or modify it under + the terms of the GNU Lesser General Public License as published by the Free + Software Foundation, either version 3 of the License, or (at your option) + any later version. + + fuzzylite 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 Lesser General Public License + for more details. + + You should have received a copy of the GNU Lesser General Public License + along with fuzzylite. If not, see <http://www.gnu.org/licenses/>. + + fuzzyliteâ„¢ is a trademark of FuzzyLite Limited. + + */ + +#include "fl/term/Trapezoid.h" + +namespace fl { + + Trapezoid::Trapezoid(const std::string& name, + scalar vertexA, scalar vertexB, scalar vertexC, scalar vertexD, scalar height) + : Term(name, height), _vertexA(vertexA), _vertexB(vertexB), _vertexC(vertexC), _vertexD(vertexD) { + if (Op::isNaN(vertexC) and Op::isNaN(vertexD)) { + //TODO: Modify FLL to allow passing two parameters only. + this->_vertexD = _vertexB; + scalar range = _vertexD - _vertexA; + this->_vertexB = _vertexA + range * 1.0 / 5.0; + this->_vertexC = _vertexA + range * 4.0 / 5.0; + } + } + + Trapezoid::~Trapezoid() { + } + + std::string Trapezoid::className() const { + return "Trapezoid"; + } + + scalar Trapezoid::membership(scalar x) const { + if (fl::Op::isNaN(x)) return fl::nan; + + if (Op::isLt(x, _vertexA) or Op::isGt(x, _vertexD)) + return _height * 0.0; + + if (Op::isLt(x, _vertexB)) + return _height * Op::min(scalar(1.0), (x - _vertexA) / (_vertexB - _vertexA)); + + if (Op::isLE(x, _vertexC)) + return _height * 1.0; + + if (Op::isLt(x, _vertexD)) + return _height * (_vertexD - x) / (_vertexD - _vertexC); + + return _height * 0.0; + } + + std::string Trapezoid::parameters() const { + return Op::join(4, " ", _vertexA, _vertexB, _vertexC, _vertexD)+ + (not Op::isEq(_height, 1.0) ? " " + Op::str(_height) : ""); + } + + void Trapezoid::configure(const std::string& parameters) { + if (parameters.empty()) return; + std::vector<std::string> values = Op::split(parameters, " "); + std::size_t required = 4; + if (values.size() < required) { + std::ostringstream ex; + ex << "[configuration error] term <" << className() << ">" + << " requires <" << required << "> parameters"; + throw fl::Exception(ex.str(), FL_AT); + } + setVertexA(Op::toScalar(values.at(0))); + setVertexB(Op::toScalar(values.at(1))); + setVertexC(Op::toScalar(values.at(2))); + setVertexD(Op::toScalar(values.at(3))); + if (values.size() > required) + setHeight(Op::toScalar(values.at(required))); + } + + void Trapezoid::setVertexA(scalar a) { + this->_vertexA = a; + } + + scalar Trapezoid::getVertexA() const { + return this->_vertexA; + } + + void Trapezoid::setVertexB(scalar b) { + this->_vertexB = b; + } + + scalar Trapezoid::getVertexB() const { + return this->_vertexB; + } + + void Trapezoid::setVertexC(scalar c) { + this->_vertexC = c; + } + + scalar Trapezoid::getVertexC() const { + return this->_vertexC; + } + + void Trapezoid::setVertexD(scalar d) { + this->_vertexD = d; + } + + scalar Trapezoid::getVertexD() const { + return this->_vertexD; + } + + Trapezoid* Trapezoid::clone() const { + return new Trapezoid(*this); + } + + Term* Trapezoid::constructor() { + return new Trapezoid; + } + + +} |