macro_tikz.sty

% wfs_chapter_hda
% - git repository https://github.com/spatialaudio/wfs_chapter_hda
% - drafts for the chapters (english, german) on **Wave Field Synthesis** for
% Stefan Weinzierl (ed.): *Handbuch der Audiotechnik*, 2nd ed., Springer,
% https://link.springer.com/referencework/10.1007/978-3-662-60357-4
% - text and graphics under CC BY 4.0 license https://creativecommons.org/licenses/by/4.0/
% - source code under MIT license https://opensource.org/licenses/MIT
% - Springer has copyright to the final english / german chapters and their layouts
% - we might also find https://git.iem.at/zotter/wfs-basics useful
% - we use violine image from https://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/Violin.svg/2048px-Violin.svg.png to create picture `python/violin_wfs.png`

% Authors:
% - Frank Schultz, https://orcid.org/0000-0002-3010-0294, https://github.com/fs446
% - Nara Hahn, https://orcid.org/0000-0003-3564-5864, https://github.com/narahahn
% - Sascha Spors, https://orcid.org/0000-0001-7225-9992, https://github.com/spors

\typeout{Document Style `macro_tikz' <2021-05-07>.}

% tikz stuff
%https://tex.stackexchange.com/questions/25342/how-to-draw-orthogonal-vectors-using-tikz
\newcommand{\tikzAngleOfLine}{\tikz@AngleOfLine}
\def\tikz@AngleOfLine(#1)(#2)#3{%
  \pgfmathanglebetweenpoints{%
    \pgfpointanchor{#1}{center}}{%
    \pgfpointanchor{#2}{center}}
  \pgfmathsetmacro{#3}{\pgfmathresult}%
}