Problem with tikzpicture scale

Question

If I compile this (with lualatex):

\documentclass[a4paper,12pt]{article}

\usepackage{tikz}

\begin{document}

\begin{tikzpicture}[scale=1]
% Declare Points
\coordinate (C) at (-0.085,0.318);
\coordinate (B) at (0.868,0.868);
\coordinate (A) at (0.868,-0.232);

% Draw EquilateralTriangle
\draw[thick] (C)
-- (B) node[midway, sloped, scale=0.5] {O}
-- (A) node[midway, sloped, scale=0.5] {O}
-- cycle node[midway, sloped, scale=0.5] {O};

\end{tikzpicture}

\end{document}

I get this correct result:

But if I set the scale to something else, like 3, then I get:

The last "O" is floating anywhere...

Is there an obvious problem in my code? Is this a bug? (If yes, is there any workaround?).

Answer 1

You can simply draw to C and then cycle. This will scale flawlessly.

Edit: The problem should be that cycle closes the current part of the path what might cause some problems if the current part is used later on.

\documentclass[a4paper,12pt]{article}

\usepackage{tikz}

\begin{document}

\begin{tikzpicture}[scale=1]
% Declare Points
\coordinate (C) at (-0.085,0.318);
\coordinate (B) at (0.868,0.868);
\coordinate (A) at (0.868,-0.232);

% Draw EquilateralTriangle
\draw[thick] (C)
-- (B) node[midway, sloped, scale=0.5] {O}
-- (A) node[midway, sloped, scale=0.5] {O}
-- (C) node[midway, sloped, scale=0.5] {O} -- cycle;

\end{tikzpicture}

\end{document}