diff options
Diffstat (limited to 'fuzzylite/fl/term/Trapezoid.h')
| -rw-r--r-- | fuzzylite/fl/term/Trapezoid.h | 94 |
1 files changed, 77 insertions, 17 deletions
diff --git a/fuzzylite/fl/term/Trapezoid.h b/fuzzylite/fl/term/Trapezoid.h index f896997..ebf5ed8 100644 --- a/fuzzylite/fl/term/Trapezoid.h +++ b/fuzzylite/fl/term/Trapezoid.h @@ -1,25 +1,17 @@ /* - Author: Juan Rada-Vilela, Ph.D. - Copyright (C) 2010-2014 FuzzyLite Limited - All rights reserved + 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 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. + the terms of the FuzzyLite License included with the software. - 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/>. - - fuzzylite™ is a trademark of FuzzyLite Limited. + 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. */ #ifndef FL_TRAPEZOID_H @@ -29,8 +21,19 @@ namespace fl { + /** + The Trapezoid class is a basic Term that represents the trapezoidal + membership function. + + @image html trapezoid.svg + + @author Juan Rada-Vilela, Ph.D. + @see Term + @see Variable + @since 4.0 + */ class FL_API Trapezoid : public Term { - protected: + private: scalar _vertexA, _vertexB, _vertexC, _vertexD; public: explicit Trapezoid(const std::string& name = "", @@ -43,27 +46,84 @@ namespace fl { FL_DEFAULT_COPY_AND_MOVE(Trapezoid) virtual std::string className() const FL_IOVERRIDE; + /** + Returns the parameters of the term + @return `"vertexA vertexB vertexC vertexD [height]"` + */ virtual std::string parameters() const FL_IOVERRIDE; + /** + Configures the term with the parameters + @param parameters as `"vertexA vertexB vertexC vertexD [height]"` + */ virtual void configure(const std::string& parameters) FL_IOVERRIDE; + virtual Complexity complexity() const FL_IOVERRIDE; + /** + Computes the membership function evaluated at @f$x@f$ + @param x + @return @f$\begin{cases} + 0h & \mbox{if $x \not\in[a,d]$}\cr + h \times \min(1, (x - a) / (b - a)) & \mbox{if $x < b$}\cr + 1h & \mbox{if $x \leq c$}\cr + h (d - x) / (d - c) & \mbox{if $x < d$}\cr + 0h & \mbox{otherwise} + \end{cases}@f$ + + where @f$h@f$ is the height of the Term, + @f$a@f$ is the first vertex of the Trapezoid, + @f$b@f$ is the second vertex of the Trapezoid, + @f$c@f$ is the third vertex of the Trapezoid, + @f$d@f$ is the fourth vertex of the Trapezoid + */ virtual scalar membership(scalar x) const FL_IOVERRIDE; + /** + Sets the first vertex of the trapezoid + @param a is the first vertex of the trapezoid + */ virtual void setVertexA(scalar a); + /** + Gets the first vertex of the trapezoid + @return the first vertex of the trapezoid + */ virtual scalar getVertexA() const; + /** + Sets the second vertex of the trapezoid + @param b is the second vertex of the trapezoid + */ virtual void setVertexB(scalar b); + /** + Gets the second vertex of the trapezoid + @return the second vertex of the trapezoid + */ virtual scalar getVertexB() const; + /** + Sets the third vertex of the trapezoid + @param c is the third vertex of the trapezoid + */ virtual void setVertexC(scalar c); + /** + Gets the third vertex of the trapezoid + @return the third vertex of the trapezoid + */ virtual scalar getVertexC() const; + /** + Sets the fourth vertex of the trapezoid + @param d is the fourth vertex of the trapezoid + */ virtual void setVertexD(scalar d); + /** + Gets the fourth vertex of the trapezoid + @return the fourth vertex of the trapezoid + */ virtual scalar getVertexD() const; virtual Trapezoid* clone() const FL_IOVERRIDE; static Term* constructor(); }; - } #endif /* FL_TRAPEZOID_H */ |