Btukfyl

The MWE below results is spurious space due to the use of tdplotsetmaincoords:

The red is the bounding box and the gray box is from fbox{}.

Including an unskipunskip (commented out in the MWE) does resolve the problem, but wondering if there is a better solution.

Is this a bug or is there a reason for this spacing?

Notes:

• Moving the tdplotsetmaincoords{70}{115} to be before begin{document} also resolves the problem, but this won't easily work for me as my figures use the standalone class and are included in other documents -- thus I need to have that setting localized with each figure.

References:

• The code for the cube drawing is from How to draw a cube with TikZ where all faces have a distinct color?.

Code:

documentclass{article}

usepackage{tikz,tikz-3dplot}



newcommand*{DrawBoundingBox}[1]{%

    draw [

        draw=red, thick,

    ]

    ([shift={(-1pt,-1pt)}]current bounding box.south west) rectangle 

    ([shift={(1pt,1pt)}]current bounding box.north east);

}



begin{document}

fboxsep=0pt

fbox{%

  %% code from https://tex.stackexchange.com/a/29342/4301

  tdplotsetmaincoords{70}{115}%

  %unskipunskip% <----- HACK which fixes the problem.

  begin{tikzpicture}[scale=4,tdplot_main_coords]

    coordinate (O) at (0,0,0);

    tdplotsetcoord{P}{1.414213}{54.68636}{45}



    draw[fill=gray!50,fill opacity=0.5] (O) -- (Py) -- (Pyz) -- (Pz) -- cycle;

    draw[fill=blue,fill opacity=0.5] (O) -- (Px) -- (Pxy) -- (Py) -- cycle;

    draw[fill=yellow,fill opacity=0.5] (O) -- (Px) -- (Pxz) -- (Pz) -- cycle;

    draw[fill=green,fill opacity=0.5] (Pz) -- (Pyz) -- (P) -- (Pxz) -- cycle;

    draw[fill=red,fill opacity=0.5] (Px) -- (Pxy) -- (P) -- (Pxz) -- cycle;

    draw[fill=magenta,fill opacity=0.5] (Py) -- (Pxy) -- (P) -- (Pyz) -- cycle;



    DrawBoundingBox

  end{tikzpicture}%

}%

end{document}

There are spurious spaces in the code. Notify the maintainer.

documentclass{article}

usepackage{tikz}

usepackage{tikz-3dplot}



newcommand*{DrawBoundingBox}[1]{%

    draw [

        draw=red, thick,

    ]

    ([shift={(-1pt,-1pt)}]current bounding box.south west) rectangle

    ([shift={(1pt,1pt)}]current bounding box.north east);

}

renewcommand{tdplotsetmaincoords}[2]{%

%perform some trig for the display transformation

%

%

%store the user-specified angles for possible future use

pgfmathsetmacro{tdplotmaintheta}{#1}% <------ changed

pgfmathsetmacro{tdplotmainphi}{#2}% <------- changed

%

%

tdplotcalctransformmainscreen

%

%now here is where the output is performed

tikzset{tdplot_main_coords/.style={x={(raarot cm,rbarot cm)},y={(rabrot cm, rbbrot cm)},z={(racrot cm, rbcrot cm)}}}%

}



begin{document}

fboxsep=0pt 

fbox{%

  %% code from https://tex.stackexchange.com/a/29342/4301

  tdplotsetmaincoords{70}{115}%

  %unskipunskip% <----- HACK which fixes the problem.

  begin{tikzpicture}[scale=4,tdplot_main_coords]

    coordinate (O) at (0,0,0);

    tdplotsetcoord{P}{1.414213}{54.68636}{45}



    draw[fill=gray!50,fill opacity=0.5] (O) -- (Py) -- (Pyz) -- (Pz) -- cycle;

    draw[fill=blue,fill opacity=0.5] (O) -- (Px) -- (Pxy) -- (Py) -- cycle;

    draw[fill=yellow,fill opacity=0.5] (O) -- (Px) -- (Pxz) -- (Pz) -- cycle;

    draw[fill=green,fill opacity=0.5] (Pz) -- (Pyz) -- (P) -- (Pxz) -- cycle;

    draw[fill=red,fill opacity=0.5] (Px) -- (Pxy) -- (P) -- (Pxz) -- cycle;

    draw[fill=magenta,fill opacity=0.5] (Py) -- (Pxy) -- (P) -- (Pyz) -- cycle;



    DrawBoundingBox

  end{tikzpicture}%

}%

end{document}