Draw sphere with some portion is dotted

Question

I need to draw the following figure : enter image description here

I have used the following code to get it :

\documentclass{article}
\usepackage{tikz}

\begin{document}
\begin{tikzpicture}
\draw (2,2) circle (3cm);
\draw (2,2) ellipse (3cm and 1cm);
\end{tikzpicture}
\end{document}

which produces :

enter image description here

How can I draw my desired figure using tikzpicture ?

Is there any way to draw an arbitrary curve with some portion of it is dotted?

Would this be helpful? http://tex.stackexchange.com/q/42812/34618 and related links there. — Jesse, Mar 22 '14 at 07:01

score 9 · Answer 1 · answered Mar 22 '14 at 11:11

I have drawn the curve in another way below :

\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw (0,0) circle (3cm);
\draw (-3,0) arc (180:360:3cm and 1cm);
\draw[dashed] (-3,0) arc (180:0:3cm and 1cm);

\end{tikzpicture}
\end{document}

enter image description here

score 7 · Accepted Answer · answered Mar 22 '14 at 07:12

7

In your case, it is very simple to draw the ellipse twice, and clip the solid part, so only half of it is shown.

\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw (2,2) circle (3cm);
\draw[dashed] (2,2) ellipse (3cm and 1cm);
\clip (-1.1,2) rectangle (5.1 cm,0.9 cm);
\draw (2,2) ellipse (3cm and 1cm);
\end{tikzpicture}
\end{document}

result

answered Mar 22 '14 at 07:12

hpekristiansen

37,006

2

An other solution(and better) is to draw only the 180 degrees you need - once solid, and once dashed. http://tex.stackexchange.com/questions/42812/3d-bodies-in-tikz – hpekristiansen Mar 22 '14 at 07:18
Thank you @Hans-PeterE.K. Your answer helped me. +1 for you. – Soumitra Sen Mar 22 '14 at 07:18
Can you explain me the function of \clip? – Soumitra Sen Mar 22 '14 at 07:39
1

It is used for clipping subsequent drawings in the same scope. See TikZ manual page 608. – hpekristiansen Mar 22 '14 at 07:49

Draw sphere with some portion is dotted

2 Answers2