Take the 2-minute tour ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

Does anyone know of the symbol used for the center of mass in physics? Typically it is a circle with two quadrants shaded in. Unfortunately I can't find this in the standard LaTeX symbols PDF or on Detexify.

Is there a predefined command for this symbol or some other way I could get it?

share|improve this question
    
In general, Scott Pakin's LaTeX comprehensive symbol list has a vast amount of symbols supported using various packages in LaTeX. See the documentation for more information. –  Werner Jul 19 '11 at 3:00
    
...sadly it's not in there... :( (yet?) –  Werner Jul 19 '11 at 3:12

1 Answer 1

up vote 23 down vote accepted

I don't think it's available as a proper symbol, but you could use TikZ to draw it. By using the units em or ex, the symbol will scale corresponding to the surrounding text.

dowel pin / center of mass / BMW symbol

\documentclass{article}

\usepackage{tikz}

\newcommand\centerofmass{%
    \tikz[radius=0.4em] {%
        \fill (0,0) -- ++(0.4em,0) arc [start angle=0,end angle=90] -- ++(0,-0.8em) arc [start angle=270, end angle=180];%
        \draw (0,0) circle;%
    }%
}

\begin{document}

Center of Mass: \centerofmass

\Huge It scales! \centerofmass

\end{document}
share|improve this answer
    
Adding the line \fill [color=white] (0,0) -- ++(0,0.4em) arc [start angle=90,end angle=180] -- ++(0.8em,0) arc [start angle=0, end angle=-90];% before \draw (0,0) circle;% allows this to be put on a dark background nicer by filling in the "white" parts with white. –  BeaumontTaz Sep 19 at 21:23

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.