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LaTeX Tikz

Table of contents

Editors and converters

$ apt-cache search tikz editor
ktikz - editor para a linguagem de desenho TikZ - versão KDE
qtikz - editor for the TikZ drawing language - Qt version
prerex - course prerequisite chart editor for LaTeX/TikZ
texlive-pictures - TeX Live: Graphics, pictures, diagrams
texlive-latex-extra - TeX Live: LaTeX additional packages
tikzit - visual PGF/TikZ graph editor

$ apt-cache search pdf2svg
pdf2svg - converte documentos PDF para arquivos SVG (um por página)

Line thickness

Line thickness
Fig. 1 - Line thickness
Line thickness
Fig. 2 - Line thickness

Relative positioning

The positioning library allows you to place nodes at a specified direction and distance from other nodes. To load the library, include in your preamble:

Positioning
Fig. 3 - Positioning
\usetikzlibrary{backgrounds}
\usetikzlibrary{positioning}

\begin{tikzpicture}[
background rectangle/.append style={draw=cyan, fill=white},
show background rectangle,
text=cyan,
]
\draw[help lines] (-2,-2) grid (2,2);
\node [red] (0) {$\bullet$};
\node{origin};
\node[right=of 0] {right};
\node[below right=of 0] {below right};
\node[below=of 0] {below};
\node[below left=of 0] {below left};
\node[left=of 0] {left};
\node[above left=of 0] {above left};
\node[above=of 0] {above};
\node[above right=of 0] {above right};
\end{tikzpicture}

Example - Linked list

Linked list
Fig. 4 - Linked list
\usetikzlibrary{calc,shapes.multipart,chains,arrows,backgrounds}
\begin{tikzpicture}[
background rectangle/.style={draw=cyan, fill=white},
show background rectangle,
text=cyan,
draw=cyan, 
list/.style={rectangle split, rectangle split parts=2, draw, rectangle split horizontal},
>=stealth,
start chain
]

\node[list,on chain] (A) {12};
\node[list,on chain] (B) {99};
\node[list,on chain] (C) {37};

\node[color=red, on chain,draw,inner sep=6pt] (D) {};
\draw[color=red] (D.north east) -- (D.south west);
\draw[color=red] (D.north west) -- (D.south east);

\draw[*->] let \p1 = (A.two), \p2 = (A.center) in (\x1,\y2) -- (B);
\draw[*->] let \p1 = (B.two), \p2 = (B.center) in (\x1,\y2) -- (C);
\draw[*->] let \p1 = (C.two), \p2 = (C.center) in (\x1,\y2) -- (D);
\end{tikzpicture}

Circle

Circle
Fig. 5 - Circle
\usetikzlibrary{backgrounds}

\begin{tikzpicture}[
scale=2,
background rectangle/.append style={draw=cyan, fill=white},
show background rectangle,
draw=cyan,
text=cyan,
]

\draw [thick] (0,0) circle (1);
\draw [dashed] (0,0) -- (0,1);
\draw [dotted] (0,0) -- (1,0);
\draw (0,0) node[below]{$O$} ;
\draw (1,0) node[right]{$A$} ;
\draw (0,1) node[above]{$B$} ;
\draw [dashdotdotted, thick] (0.9,0) arc (0:90:0.9);
\draw (0,0) node {$\bullet$};

\end{tikzpicture}

Package intersections

Intersections
Fig. 6 - Intersections
\usetikzlibrary{intersections}
\usetikzlibrary{backgrounds}

\begin{tikzpicture}[
background rectangle/.style={draw=cyan,fill=white},
show background rectangle,
text=cyan,
draw=cyan,
]
    % Draw to path and give a name to them
    \draw [red, thin, name path={red line}] (0,0) -- (4,3);
    \draw [cyan, name path={blue curve}] (1,-0.5) to[out=80, in=100] (3,2);
    % use the intersections on a path to giv them coordinates
    % and draw a line between them
    \draw [green, thick, name intersections={of=red line and blue curve, 
           by={first intersect, second intersect}}]
       (first intersect) -- (second intersect);
    % one can use the coordinates furtheron
    \node [above] at (first intersect) {A};
    \node [below] at (second intersect) {B};
\end{tikzpicture}

References