kroki.io也支持TikZ 通过 url 参数

hbghlyj

kroki.io/#support
在此表中许多行，包含一行TikZ

hbghlyj

1. \documentclass{article}
2. \usepackage{tikz}
3. \usepackage{tikz-3dplot}
4. \usetikzlibrary{math}
5. \usepackage[active,tightpage]{preview}
6. \PreviewEnvironment{tikzpicture}
7. \setlength\PreviewBorder{0.125pt}
8. \begin{document}
9.   \tdplotsetmaincoords{80}{120}
10.   %
11.   \begin{tikzpicture}[tdplot_main_coords,scale=0.75]
12.     % Indicate the components of the vector in rectangular coordinates
13.     \pgfmathsetmacro{\ux}{4}
14.     \pgfmathsetmacro{\uy}{4}
15.     \pgfmathsetmacro{\uz}{3}
16.     % Length of each axis
17.     \pgfmathsetmacro{\ejex}{\ux+0.5}
18.     \pgfmathsetmacro{\ejey}{\uy+0.5}
19.     \pgfmathsetmacro{\ejez}{\uz+0.5}
20.     \pgfmathsetmacro{\umag}{sqrt(\ux*\ux+\uy*\uy+\uz*\uz)} % Magnitude of vector $\vec{u}$
21.     % Compute the angle $\theta$
22.     \pgfmathsetmacro{\angthetax}{pi*atan(\uy/\ux)/180}
23.     \pgfmathsetmacro{\angthetay}{pi*atan(\ux/\uz)/180}
24.     \pgfmathsetmacro{\angthetaz}{pi*atan(\uz/\uy)/180}
25.     % Compute the angle $\phi$
26.     \pgfmathsetmacro{\angphix}{pi*acos(\ux/\umag)/180}
27.     \pgfmathsetmacro{\angphiy}{pi*acos(\uy/\umag)/180}
28.     \pgfmathsetmacro{\angphiz}{pi*acos(\uz/\umag)/180}
29.     % Compute rho sin(phi) to simplify computations
30.     \pgfmathsetmacro{\costz}{cos(\angthetax r)}
31.     \pgfmathsetmacro{\sintz}{sin(\angthetax r)}
32.     \pgfmathsetmacro{\costy}{cos(\angthetay r)}
33.     \pgfmathsetmacro{\sinty}{sin(\angthetay r)}
34.     \pgfmathsetmacro{\costx}{cos(\angthetaz r)}
35.     \pgfmathsetmacro{\sintx}{sin(\angthetaz r)}
36.     % Coordinate axis
37.     \draw[thick,->] (0,0,0) -- (\ejex,0,0) node[below left] {$x$};
38.     \draw[thick,->] (0,0,0) -- (0,\ejey,0) node[right] {$y$};
39.     \draw[thick,->] (0,0,0) -- (0,0,\ejez) node[above] {$z$};
40.     % Projections of the components in the axis
41.     \draw[gray,very thin,opacity=0.5] (0,0,0) -- (\ux,0,0) -- (\ux,\uy,0) -- (0,\uy,0) -- (0,0,0);        % face on the plane z = 0
42.     \draw[gray,very thin,opacity=0.5] (0,0,\uz) -- (\ux,0,\uz) -- (\ux,\uy,\uz) -- (0,\uy,\uz) -- (0,0,\uz);        % face on the plane z = \uz
43.     \draw[gray,very thin,opacity=0.5] (0,0,0) -- (0,0,\uz) -- (\ux,0,\uz) -- (\ux,0,0) -- (0,0,0);        % face on the plane y = 0
44.     \draw[gray,very thin,opacity=0.5] (0,\uy,0) -- (0,\uy,\uz) -- (\ux,\uy,\uz) -- (\ux,\uy,0) -- (0,\uy,0);        % face on the plane y = \uy
45.     \draw[gray,very thin,opacity=0.5] (0,0,0) -- (0,\uy,0) -- (0,\uy,\uz) -- (0,0,\uz) -- (0,0,0); % face on the plane x = 0
46.     \draw[gray,very thin,opacity=0.5] (\ux,0,0) -- (\ux,\uy,0) -- (\ux,\uy,\uz) -- (\ux,0,\uz) -- (\ux,0,0); % face on the plane x = \ux
47.     % Arc indicating the angle $\alpha$
48.     % (angle formed by the vector $\vec{v}$ and the $x$ axis)
49.     \draw[red,thick] plot[domain=0:\angphix,smooth,variable=\t] ({cos(\t r)},{sin(\t r)*\costx},{sin(\t r)*\sintx});
50.     % Arc indicating the angle $\beta$
51.     % (angle formed by the vector $\vec{v}$ and the $y$ axis)
52.     \draw[red,thick] plot[domain=0:\angphiy,smooth,variable=\t] ({sin(\t r)*\sinty},{cos(\t r)},{sin(\t r)*\costy});
53.     % Arc indicating the angle $\gamma$
54.     % (angle formed by the vector $\vec{v}$ and the $z$ axis)
55.     \draw[red,thick] plot[domain=0:\angphiz,smooth,variable=\t] ({sin(\t r)*\costz},{sin(\t r)*\sintz},{cos(\t r)});
56.     % Vector $\vec{u}$
57.     \draw[blue,thick,->] (0,0,0) -- (\ux,\uy,\uz) node [below right] {$\vec{u}$};
58.     % Nodes indicating the direction angles
59.     \pgfmathsetmacro{\xa}{1.85*cos(0.5*\angphix r)}
60.     \pgfmathsetmacro{\ya}{1.85*sin(0.5*\angphix r)*\costx}
61.     \pgfmathsetmacro{\za}{1.85*sin(0.5*\angphiz r)*\sintx}
62.     \node[red] at (\xa,\ya,\za) {\footnotesize$\alpha$};
63.     %
64.     \pgfmathsetmacro{\xb}{1.5*sin(0.5*\angphiy r)*\sinty}
65.     \pgfmathsetmacro{\yb}{1.5*cos(0.5*\angphiy r)}
66.     \pgfmathsetmacro{\zb}{1.5*sin(0.5*\angphiy r)*\costy}
67.     \node[red] at (\xb,\yb,\zb) {\footnotesize$\beta$};
68.     %
69.     \pgfmathsetmacro{\xc}{1.5*sin(0.5*\angphiz r)*\costz}
70.     \pgfmathsetmacro{\yc}{1.5*sin(0.5*\angphiz r)*\sintz}
71.     \pgfmathsetmacro{\zc}{1.5*cos(0.5*\angphiz r)}
72.     \node[red] at (\xc,\yc,\zc) {\footnotesize$\gamma$};
73.     %
74.   \end{tikzpicture}
75.   %
76. \end{document}

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hbghlyj

@kuing 建议添加 BBcode 支持调用 kroki.io，以便从各种文本描述（包括 tikz、PlantUML、GraphViz 等）生成图表。应该与调用 i.upmath.me 相同，但 kroki.io 支持更多类型。


官方主页有一个实时编辑器，可以选择多种图表类型。