Josia Pietsch
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41 lines
1.6 KiB
TeX
41 lines
1.6 KiB
TeX
% *** quiver ***
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% A package for drawing commutative diagrams exported from https://q.uiver.app.
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%
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% This package is currently a wrapper around the `tikz-cd` package, importing necessary TikZ
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% libraries, and defining a new TikZ style for curves of a fixed height.
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%
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% Version: 1.4.0
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% Authors:
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% - varkor (https://github.com/varkor)
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% - AndréC (https://tex.stackexchange.com/users/138900/andr%C3%A9c)
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\NeedsTeXFormat{LaTeX2e}
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\ProvidesPackage{quiver}[2021/01/11 quiver]
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% `tikz-cd` is necessary to draw commutative diagrams.
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\RequirePackage{tikz-cd}
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% `amssymb` is necessary for `\lrcorner` and `\ulcorner`.
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\RequirePackage{amssymb}
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% `calc` is necessary to draw curved arrows.
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\usetikzlibrary{calc}
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% `pathmorphing` is necessary to draw squiggly arrows.
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\usetikzlibrary{decorations.pathmorphing}
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% A TikZ style for curved arrows of a fixed height, due to AndréC.
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\tikzset{curve/.style={settings={#1},to path={(\tikztostart)
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.. controls ($(\tikztostart)!\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
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and ($(\tikztostart)!1-\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
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.. (\tikztotarget)\tikztonodes}},
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settings/.code={\tikzset{quiver/.cd,#1}
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\def\pv##1{\pgfkeysvalueof{/tikz/quiver/##1}}},
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quiver/.cd,pos/.initial=0.35,height/.initial=0}
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% TikZ arrowhead/tail styles.
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\tikzset{tail reversed/.code={\pgfsetarrowsstart{tikzcd to}}}
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\tikzset{2tail/.code={\pgfsetarrowsstart{Implies[reversed]}}}
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\tikzset{2tail reversed/.code={\pgfsetarrowsstart{Implies}}}
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% TikZ arrow styles.
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\tikzset{no body/.style={/tikz/dash pattern=on 0 off 1mm}}
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\endinput
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