[Tex/LaTex] Draw and label arcs to label angles

labelstikz-pgf

I have written the following in LaTeX. I have trouble drawing and labeling all my angles (I want to label the angles in B, C, D and F. I have so far only managed to draw those in C (easier because origin).

% PREAMBLE
% The preamble consists of the parameters for the document, i.e. the margins, the font, the spacing,
% the document type, supplementary packages, etc. Some Latex commands require the use of a
% package defined in the preamble.

\documentclass[a4paper,11pt]{article}
\usepackage[left=2.8cm,top=2.8cm,right=2.8cm,bottom=2.8cm]{geometry}
\usepackage[dutch]{babel}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{geometry}     
\geometry{letterpaper}                          
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{tabularx}
\usepackage{titling}
\usepackage[parfill]{parskip}           
\usepackage{indentfirst}
\usepackage{gensymb}
\usepackage{tocbibind}
\usepackage{tikz}
\usetikzlibrary{babel}
\usetikzlibrary{calc,patterns,intersections,angles,shapes,through,arrows,decorations.pathmorphing,backgrounds,positioning,fit,petri}

As my figure (I need to label and reference it) I have:

    \begin{figure}
    \centering
        \begin{tikzpicture}[scale=0.4]      
        %coördinats
        \coordinate[label=above:£A£] (A) at (-6,0); 
        \coordinate[label=left:£B£] (B) at (-10.8844,0); 
        \coordinate (B2) at (-7.8844,0);
        \coordinate (B3) at (-7.4844,0);
        \coordinate[label=120:£C£] (C) at (0,0);
        \coordinate (C2) at (1.8,0);
        \coordinate (C3) at (2.2,0);
        \coordinate[label=below:£D£] (D) at (-61:10cm);
        \coordinate (D2) at (6.84809620246,-8.74619707139);
        \coordinate[label=left:£E£] (E) at (9.69619240493,0);
        \coordinate[label=above:£F£] (F) at (61:10cm);
        \coordinate (F2) at (6.84809620246,8.74619707139);
        %draw angles
        \draw[gray] (B2) arc (0:29.07:3.0);
        \draw[gray] (B3) arc (0:-29.07:3.4);
        \draw[gray] (C2) arc (0:61:1.8);
        \node[] at (30.5:2.5)  {$\phi_{6}$};
        \draw[gray] (C3) arc (0:-61:2.2);
        \node[] at (-30.5:3.15)  {$-\phi_{5}$};
        \draw[gray] (D2) arc (0:61:2);
        \draw[gray] (F2) arc (0:-61:2);
        %draw points
        \foreach \point in {A,B,C,D,E,F}
            \fill [black] (\point) circle (5pt);
        %draw lines
        \draw[blue,very thick] (A) -- (B);
        \draw[black, very thick] (A) -- (C) -- (D) -- (E) -- (F) -- (C);
        \draw[black, very thick] (B) -- (D);
        \draw[black, very thick] (B) -- (F);
        %draw aid lines
        \draw[gray] (C) -- +(3,0);
        \draw[gray] (D) -- +(3,0);
        \draw[gray] (F) -- +(3,0);
        \end{tikzpicture}
        \caption{Mechanism}
        \label{M}
        \vspace{0.8cm}
    \end{figure}

Also, would it be possible to have arc with an arrow point? I appreciate your help!

Best Answer

You can load

\usetikzlibrary{angles,quotes}

and draw the angles.

    \pic [draw,->,red,thick,angle radius=1cm,"$A$"{anchor=west,text =
         black,font=\footnotesize}, angle eccentricity=1] {angle = C--B--F};
    \pic [draw,latex-,blue,thick,angle radius=1cm,"$B$"{anchor=west,text =
         black,font=\footnotesize}, angle eccentricity=1] {angle = D--B--C};
    \pic [draw,-stealth,red,thick,angle radius=1cm,"$\phi_{6}$"{anchor=west,text =
         black,font=\footnotesize}, angle eccentricity=1] {angle = c--C--F};
    \pic [draw,latex-,green,thick,angle radius=1.2cm,"$-\phi_{5}$"{anchor=west,text =
         black,font=\footnotesize}, angle eccentricity=1] {angle = D--C--c};
    \pic [draw,-stealth,red,thick,angle radius=1cm,"$\phi_{7}$"{anchor=west,text =
         black,font=\footnotesize}, angle eccentricity=1] {angle = d--D--E};
    \pic [draw,gray,thick,angle radius=1cm,"$\phi_{10}$"{anchor=west,text =
         black,font=\footnotesize}, angle eccentricity=1] {angle = E--F--f};

Here is the full code:

\documentclass[tikz,border=4]{standalone}
\usetikzlibrary{angles,quotes}
\begin{document}
        \begin{tikzpicture}[scale=0.4]
        %coördinats
        \coordinate[label=above:£A£] (A) at (-10,0);
        \coordinate[label=left:£B£] (B) at (-14.8844,0);
        \coordinate (B2) at (-11.8844,0);
        \coordinate (B3) at (-11.4844,0);
        \coordinate[label=120:£C£] (C) at (0,0);
        \coordinate (C2) at (1.8,0);
        \coordinate (C3) at (2.2,0);
        \coordinate[label=below:£D£] (D) at (-61:10cm);
        \coordinate (D2) at (6.84809620246,-8.74619707139);
        \coordinate[label=left:£E£] (E) at (9.69619240493,0);
        \coordinate[label=above:£F£] (F) at (61:10cm);
        \coordinate (F2) at (6.84809620246,8.74619707139);

        %draw points
        \foreach \point in {A,B,C,D,E,F}
            \fill [black] (\point) circle (5pt);
        %draw lines
        \draw[blue,very thick] (A) -- (B);
        \draw[black, very thick] (A) -- (C) -- (D) -- (E) -- (F) -- (C);
        \draw[black, very thick] (B) -- (D);
        \draw[black, very thick] (B) -- (F);
        %draw aid lines
        \draw[gray] (C) -- +(3,0)coordinate (c);
        \draw[gray] (D) -- +(3,0)coordinate (d);
        \draw[gray] (F) -- +(3,0)coordinate (f);

        \pic [draw,->,red,thick,angle radius=1cm,"$A$"{anchor=west,text =
             black,font=\footnotesize}, angle eccentricity=1] {angle = C--B--F};
        \pic [draw,latex-,blue,thick,angle radius=1cm,"$B$"{anchor=west,text =
             black,font=\footnotesize}, angle eccentricity=1] {angle = D--B--C};
        \pic [draw,-stealth,red,thick,angle radius=1cm,"$\phi_{6}$"{anchor=west,text =
             black,font=\footnotesize}, angle eccentricity=1] {angle = c--C--F};
        \pic [draw,latex-,green,thick,angle radius=1.2cm,"$-\phi_{5}$"{anchor=west,text =
             black,font=\footnotesize}, angle eccentricity=1] {angle = D--C--c};
        \pic [draw,-stealth,red,thick,angle radius=1cm,"$\phi_{7}$"{anchor=west,text =
             black,font=\footnotesize}, angle eccentricity=1] {angle = d--D--E};
        \pic [draw,gray,thick,angle radius=1cm,"$\phi_{10}$"{anchor=west,text =
             black,font=\footnotesize}, angle eccentricity=1] {angle = E--F--f};
        \end{tikzpicture}
\end{document}

enter image description here

Related Solutions

[Tex/LaTex] Rotate a node but not its content: the case of the ellipse decoration

The source of the difficulty is that ellipses are constructed in a particular way in TikZ. They are paths that start from the x-axis and proceed counter-clockwise around their centre. The vast majority of the time, the exact parametrisation doesn't matter. You appear to have found the one situation where it does!

In the actual question, you only want to be able to mirror the ellipse, and so draw it starting from the negative x-axis (the title of the question suggests a more flexible approach). That's actually not too hard since we can exploit the symmetry of the ellipse. The key is to provide it with a negative x-radius, since then it will start from the negative x-axis (and proceed clockwise, but we could correct for that by negating the y-radius as well). To do this, we interrupt the call from the node shape to the drawing command and flip the sign of the x-radius. The simplest way to do this is to redefine the \pgfpathellipse macro to do the negation and then call the original macro. The following code does this.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{decorations,shapes,decorations.markings}
\makeatletter
\let\origpgfpathellipse=\pgfpathellipse
\def\revpgfpathellipse#1#2#3{%
  #2%
  \pgf@xa=-\pgf@x
  \origpgfpathellipse{#1}{\pgfqpoint{\pgf@xa}{0pt}}{#3}}
\makeatother

\tikzset{
  reversed ellipse/.style={
    ellipse,
    reverse the ellipse%
  },
  reverse the ellipse/.code={
    \let\pgfpathellipse=\revpgfpathellipse
  }
}
\begin{document}
\begin{tikzpicture}
\node[ellipse,
  draw,
  postaction={
    decorate,
    decoration={
      markings,
      mark=at position 1 with {
        \arrow[line width=5pt,blue]{>}
      }
    }
  }
] at (0,0) {hello world};

\node[reversed ellipse,
  draw,
  postaction={
    decorate,
    decoration={
      markings,
      mark=at position 1 with {
        \arrow[line width=5pt,blue]{>}
      }
    }
  }
] at (0,-2) {hello world};
\end{tikzpicture}

\end{document}

Here's the result:

rotated ellipse

(the arrow got clipped, but you can see where it lies)

[Tex/LaTex] TikZ/ERD: node (=Entity) label on the inside

I guess this is one way of doing it:

\documentclass[tikz,border=5]{standalone}

\usetikzlibrary{matrix}
\begin{document}
\tikzset{
    entity/.code={
        \tikzset{
            rounded corners,             
            name=#1,
            inner sep=2pt,
            every entity/.try,
        }%
        \def\entityname{#1}%
    },
    entity anchor/.style={matrix anchor=#1},
    every entity/.style={
            draw,
    },
    every property/.style={
        inner xsep=0.20cm, inner ysep=0.075cm, anchor=west, text width=1.75in
    }
}
\def\property#1{\node[name=\entityname-#1, every property/.try]{\propertysplit#1;};}
\def\properties{\begingroup\catcode`\_=11\relax\processproperties}
\def\processproperties#1{\endgroup%
    \gdef\propertycode{}%
    \foreach \p in {#1}{%
        \expandafter\expandafter\expandafter\gdef\expandafter\expandafter\expandafter\propertycode%
            \expandafter\expandafter\expandafter{\expandafter\propertycode\expandafter\property\expandafter{\p}\\}%
    }%
    \propertycode%
}
\def\propertysplit#1:#2;{#1:\hfill#2}

\def\entitynamenode{%
\node[every entity name/.try] (\entityname-name) {\entityname};
\draw (\entityname-name.south west) -- (\entityname-name.south east);
\\[1ex]
}
\tikzset{
  every entity name/.style={every property/.try, align=center}
}

\begin{tikzpicture}[every node/.style={font=\ttfamily}, node distance=0.5in]
\matrix [entity=Employee] {
    \entitynamenode
    \properties{
        Username :  varchar(255),
        Password :  varchar(255),        
        Name :  varchar(255),
        LastName :  varchar(255)
    }
};
\end{tikzpicture}   

\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Rotate a node but not its content: the case of the ellipse decoration

[Tex/LaTex] TikZ/ERD: node (=Entity) label on the inside

Related Question