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I'd like to draw crystal structures using TikZ-3Dplot'''. I saw that solutions exist with Asymptote, but for some reason, I can't install it (and I admit I had trouble understanding how the package works).

I started with TikZ 3D Plot, which seems to work.

I just have one question: I can't keep some lines horizontal, which I find unsightly (I've tried several angle values ​​in the command \tdplotsetmaincoords, but without success).

crystal

\documentclass{standalone}
\usepackage{tikz,tikz-3dplot}
\usepackage{xcolor}

\begin{document}    
        
        \tdplotsetmaincoords{75}{10}
        \begin{tikzpicture}[tdplot_main_coords, scale = 5]
                
            
            % ---- Tracé des traits du réseau ----
            \draw[thin] (0,0,0) -- (1,0,0) -- (1,1,0) -- (0,1,0) -- (0,0,0);
            \draw[thin] (0,0,1) -- (1,0,1) -- (1,1,1) -- (0,1,1) -- (0,0,1);
            \draw[thin] (0,0,0) -- (0,0,1);
            \draw[thin] (1,0,0) -- (1,0,1);
            \draw[thin] (1,1,0) -- (1,1,1);
            \draw[thin] (0,1,0) -- (0,1,1);


            \tdplottransformmainscreen{0}{0}{0}
            \shadedraw[tdplot_screen_coords, ball color = blue] (\tdplotresx,\tdplotresy) circle (0.10);
        \end{tikzpicture}
    

\end{document}
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  • 1
    It’s an orthographic projection of an orthogonal basis. You will be unable to get them horizontal in most cases. Commented 22 hours ago

1 Answer 1

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8

Replace \begin{tikzpicture}[tdplot_main_coords, scale = 5]

by \begin{tikzpicture}[x={(0:1cm)},y={(30:0.5cm)},z={(90:1cm)},scale = 5].

Code:

\documentclass{standalone}
\usepackage{tikz,tikz-3dplot}
\usepackage{xcolor}

\begin{document}    
        
        \tdplotsetmaincoords{75}{10}
        \begin{tikzpicture}[x={(0:1cm)},y={(30:0.5cm)},z={(90:1cm)},scale = 5]
                
            
            % ---- Tracé des traits du réseau ----
            \draw[thin] (0,0,0) -- (1,0,0) -- (1,1,0) -- (0,1,0) -- (0,0,0);
            \draw[thin] (0,0,1) -- (1,0,1) -- (1,1,1) -- (0,1,1) -- (0,0,1);
            \draw[thin] (0,0,0) -- (0,0,1);
            \draw[thin] (1,0,0) -- (1,0,1);
            \draw[thin] (1,1,0) -- (1,1,1);
            \draw[thin] (0,1,0) -- (0,1,1);


            \tdplottransformmainscreen{0}{0}{0}
            \shadedraw[tdplot_screen_coords, ball color = blue] (\tdplotresx,\tdplotresy) circle (0.10);
        \end{tikzpicture}
    

\end{document}

For comparison, at left, your original code, at right, the corrected code:

output comparison

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