微分立体角

Question

如何用 tikz 绘制这些图形？

http://www.seos-project.eu/modules/laser-rs/laser-rs-c03-s02-p02.html

谢谢

燃气涡轮

Answer 1

如果你的问题看起来像“给我画一个”，那么你将得不到答案

所以你至少不会得到完整的答案。阴影锥体和添加标签由你决定。当然，没有解释和保证 ;)

\documentclass[tikz,border=5]{standalone}
\begin{document}
  \begin{tikzpicture}
    \draw (2,0) arc (-0:-180:4cm and 2cm)coordinate[pos=0.75] (a);
    \draw[dotted] (2,0) arc (0:180:4cm and 2cm);
    \draw (2,0) arc (0:180:4cm);
    \begin{scope}[rotate around={50:(-2,0)}]
    \draw[shade,fill=gray!40] (1.3,5mm) -- (-2,0) -- (1.3,-5mm);
    \draw[fill=gray!40] (1.3,0) circle(2mm and 5mm);
    \end{scope}
    \draw[thick,-stealth] (-2,0) -- (a);
    \draw[thick] (-2,0) -- node[pos=0.75,fill,inner sep=2pt,circle,yscale=0.7](b){}(-2,5);
    \draw (a) to[bend left] (b);
  \end{tikzpicture}
\end{document}