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% Copyright 2018-2020 by Romano Giannetti
% Copyright 2015-2020 by Stefan Lindner
% Copyright 2013-2020 by Stefan Erhardt
% Copyright 2007-2020 by Massimo Redaelli
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the files gpl-3.0_license.txt and lppl-1-3c_license.txt for more details.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Current handling
%% styles
\ctikzset{bipole current style/.style={}}
\tikzset{bipole current style/.code={
\ctikzset{bipole current style/.style={#1}}
}}
\tikzset{bipole current append style/.code={
\ctikzset{bipole current style/.append style={#1}}
}}
%% Options
\ctikzset{i^>/.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = forward,
\circuitikzbasekey/bipole/current/x position = after,
\circuitikzbasekey/bipole/current/y position = above
}
}
\ctikzset{i_>/.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = forward,
\circuitikzbasekey/bipole/current/x position = after,
\circuitikzbasekey/bipole/current/y position = below
}
}
\ctikzset{i>^/.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = forward,
\circuitikzbasekey/bipole/current/x position = before,
\circuitikzbasekey/bipole/current/y position = above
}
}
\ctikzset{i>_/.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = forward,
\circuitikzbasekey/bipole/current/x position = before,
\circuitikzbasekey/bipole/current/y position = below
}
}
\ctikzset{i^</.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = backward,
\circuitikzbasekey/bipole/current/x position = after,
\circuitikzbasekey/bipole/current/y position = above
}
}
\ctikzset{i_</.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = backward,
\circuitikzbasekey/bipole/current/x position = after,
\circuitikzbasekey/bipole/current/y position = below
}
}
\ctikzset{i<^/.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = backward,
\circuitikzbasekey/bipole/current/x position = before,
\circuitikzbasekey/bipole/current/y position = above
}
}
\ctikzset{i<_/.style = {
i = #1,
\circuitikzbasekey/bipole/current/direction = backward,
\circuitikzbasekey/bipole/current/x position = before,
\circuitikzbasekey/bipole/current/y position = below
}
}
\ctikzset{i/.code = {
\pgfcirc@has@itrue
\pgfkeys{\circuitikzbasekey/bipole/current/direction = forward,
\circuitikzbasekey/bipole/current/x position = after,
\circuitikzbasekey/bipole/current/y position = above }
\pgfkeys{/tikz/circuitikz/bipole/current/label/name=#1}
\ctikzsetvalof{bipole/current/label/unit}{}
\ifpgf@circ@siunitx
\pgf@circ@handleSI{#1}
\ifpgf@circ@siunitx@res
\edef\pgf@temp{\pgf@circ@handleSI@val}
\pgfkeyslet{/tikz/circuitikz/bipole/current/label/name}{\pgf@temp}
\edef\pgf@temp{\pgf@circ@handleSI@unit}
\pgfkeyslet{/tikz/circuitikz/bipole/current/label/unit}{\pgf@temp}
\else
\fi
\else
\fi
%reverse current direction for voltage sources
\ifpgf@circ@oldvoltagedirection\else
\ifpgf@circuit@bipole@isvoltage
\ifpgf@circuit@bipole@voltage@backward
\pgfkeys{\circuitikzbasekey/bipole/current/direction = forward,
\circuitikzbasekey/bipole/current/x position = after,
\circuitikzbasekey/bipole/current/y position = below }
\else
\pgfkeys{\circuitikzbasekey/bipole/current/direction = backward,
\circuitikzbasekey/bipole/current/x position = before,
\circuitikzbasekey/bipole/current/y position = above }
\fi\fi\fi
}
}
\ifpgf@circ@oldvoltagedirection
\ctikzset{i</.style = { i = #1, \circuitikzbasekey/bipole/current/direction = backward } }
\else
\ctikzset{i</.style = { i = #1, \circuitikzbasekey/bipole/current/direction = backward, \circuitikzbasekey/bipole/current/x position = before } }
\fi
\ctikzset{i_/.style = { i = #1, \circuitikzbasekey/bipole/current/y position = below } }
\ctikzset{i>/.style = {i = #1, \circuitikzbasekey/bipole/current/direction = forward } }
\ctikzset{i^/.style = { i= #1, \circuitikzbasekey/bipole/current/y position = above } }
%% Output routine
\def\pgf@circ@drawcurrent{
\pgfextra{
\edef\pgf@circ@rounded@dir{\pgf@circ@direction}
\def\pgfcircmathresult{\expandafter\pgf@circ@stripdecimals\pgf@circ@rounded@dir\pgf@nil}
\ifnum\pgfcircmathresult >4 \ifnum\pgfcircmathresult <86
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{north west} \else \def\pgf@circ@dir{south east}
\fi
\fi\fi
\ifnum\pgfcircmathresult >85 \ifnum\pgfcircmathresult <95
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{west} \else \def\pgf@circ@dir{east}
\fi
\fi\fi
\ifnum\pgfcircmathresult >94 \ifnum\pgfcircmathresult <176
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{south west}\else \def\pgf@circ@dir{north east}
\fi
\fi\fi
\ifnum\pgfcircmathresult >175 \ifnum\pgfcircmathresult <185
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{south}\else\def\pgf@circ@dir{north}
\fi
\fi\fi
\ifnum\pgfcircmathresult >184 \ifnum\pgfcircmathresult <266
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{south east}\else\def\pgf@circ@dir{north west}
\fi
\fi\fi
\ifnum\pgfcircmathresult >265 \ifnum\pgfcircmathresult <275
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{east}\else \def\pgf@circ@dir{west}
\fi
\fi\fi
\ifnum\pgfcircmathresult >274 \ifnum\pgfcircmathresult <356
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{north east}\else\def\pgf@circ@dir{south west}
\fi
\fi\fi
\ifnum\pgfcircmathresult <5
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{north}\else\def\pgf@circ@dir{south}
\fi
\fi
\ifnum\pgfcircmathresult >355
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@dir{north}\else\def\pgf@circ@dir{south}
\fi
\fi
% export anchor position (if not needed, is always the same macro)
\expandafter\xdef\csname pgfcirc@\pgfcirc@a@prefix-Ilab-anchor\endcsname{\pgf@circ@dir}
\ifpgf@circuit@bipole@current@below
\def\pgf@circ@bipole@current@label@where{-90}
\else
\def\pgf@circ@bipole@current@label@where{+90}
\fi
}
%
\pgfextra{\def\pgf@temp{short}\edef\pgf@circ@temp{\ctikzvalof{bipole/kind}}}
\ifx\pgf@circ@temp\pgf@temp%draw current at a short at middle of the line
coordinate (\pgfcirc@a@prefix-Ifrom) at (\tikztostart)
coordinate (\pgfcirc@a@prefix-Ito) at (\tikztotarget)
\else% normal bipole or source
\ifpgf@circuit@bipole@current@before
coordinate (\pgfcirc@a@prefix-Ifrom) at (\tikztostart)
coordinate (\pgfcirc@a@prefix-Ito) at (anchorstartnode)
\else
coordinate (\pgfcirc@a@prefix-Ifrom) at (anchorendnode)
coordinate (\pgfcirc@a@prefix-Ito) at (\tikztotarget)
\fi
\fi
\ifpgf@circuit@bipole@current@backward
\pgfextra{
\pgfmathsubtract{\pgf@circ@rounded@dir}{180}
\edef\pgf@circ@rounded@dir{\expandafter\pgf@circ@stripdecimals\pgfmathresult\pgf@nil}
}
\fi
coordinate (\pgfcirc@a@prefix-Ipos) at ($(\pgfcirc@a@prefix-Ifrom)! \ctikzvalof{current/distance} !(\pgfcirc@a@prefix-Ito)$)
% if the current label is not empty (in which case we have already all the anchors)
\pgf@circ@ifkeyempty{bipole/current/label/name}\else
% put the arrow node
node[currarrow, rotate=\pgf@circ@rounded@dir, anchor=center](Iarrow) at (\pgfcirc@a@prefix-Ipos) {}
% put the label
node[anchor=\pgf@circ@dir, \circuitikzbasekey/bipole current style]
(\ctikzvalof{bipole/name}current)
at (Iarrow.\pgf@circ@bipole@current@label@where){\pgf@circ@finallabels{current/label}}
\fi % end ifempty
\ifpgf@circuit@bipole@current@backward
\pgfcirc@swap@coordinates{\pgfcirc@a@prefix-Ifrom}{\pgfcirc@a@prefix-Ito}
\fi
}
\endinput
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