optdefi/optdefi.sty at main · parinchaipunya/optdefi · GitHub

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% Developed by Parin Chaipunya, KMUTT.

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{optproblem}[2025/06/11 optimization problem definition]

\RequirePackage{amsmath}
\RequirePackage{amssymb}
\RequirePackage{empheq}
\RequirePackage{eqparbox}
\RequirePackage{environ}

% \newcommand*{\centermathcell}[1]{\omit\hfill$\displaystyle#1$\hfill\ignorespaces}
% \newcommand{\centermathcell}[1]{\eqmakebox[op][c]{#1}}
\newcounter{OptEnv}
\newcounter{ConsNum}

% Environment for optimization problem
\NewEnviron{optim}{%
  \stepcounter{OptEnv}
  \setcounter{ConsNum}{0}
    \begin{empheq}[left=\empheqlbrace\;]{alignat=2}
      \BODY
    \end{empheq}
  % \addtocounter{OptEnv}{1}
}
\NewEnviron{optim*}{%
  \stepcounter{OptEnv}
  \setcounter{ConsNum}{0}
  \begin{empheq}[left=\empheqlbrace\;]{alignat*=2}
    \BODY
  \end{empheq}
  % \addtocounter{OptEnv}{1}
}
\NewEnviron{optimunc}{%
  \begin{align}
    \BODY
  \end{align}
}
\NewEnviron{optimunc*}{%
  \begin{align*}
    \BODY
  \end{align*}
}


% Some commands
\DeclareMathOperator*{\argmin}{arg\,min}
\DeclareMathOperator*{\argmax}{arg\,max}
\DeclareMathOperator*{\minormax}{\min \big/ \max}
\newcommand{\subjto}{\small\text{s.t.}}
\newcommand{\Subjto}{\\ \eqmakebox[OE\arabic{OptEnv}][c]{$\subjto$} \quad }
\newcommand{\chk}{\ifnum\value{ConsNum}>0 \\ \else \Subjto \fi}

% \setObj{sense}{var}{Obj}
\newcommand{\setObj}[3]{%
  \eqmakebox[OE\arabic{OptEnv}][c]{$\displaystyle #1_{#2}$} \quad & #3 %
  % \\
  % \subjto \quad
}
\newcommand{\addCons}[1]{%
  \chk
  & {#1}
  \addtocounter{ConsNum}{1}
}
\newcommand{\addEqCons}[2]{%
  \chk
  & {#1} = {#2}
  \addtocounter{ConsNum}{1}
}
\newcommand{\addIneqCons}[2]{%
  \chk
  & {#1} \leq {#2}
  \addtocounter{ConsNum}{1}
}
\newcommand{\addLbCons}[2]{%
  \chk
  & {#1} \geq {#2}
  \addtocounter{ConsNum}{1}
}
% \addBddCons{x}{a}{b} -> a \leq x \leq b
\newcommand{\addBddCons}[3]{%
  \chk
  & {#2} \leq {#1} \leq {#3}
  \addtocounter{ConsNum}{1}
}
\newcommand{\addInclCons}[2]{%
  \chk
  & {#1} \in {#2}
  \addtocounter{ConsNum}{1}
}