I have big troubles trying to draw the next picture in latex, could you help me? I´m desperate, it´s for my bachelor thesis...

enter image description here The idea is to make a nice picture of the circumference´s decomposition following the last photo.

I need the same thing but this time with the sphere :

enter image description here

Thank you for your time.

  • 1
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You can play with polar coordinates and arc to get the circle sectors.

\begin{tikzpicture}[very thick]
  \draw (0,0) circle (1);
  \draw[cyan] (180+\angStart:1.1) arc (180+\angStart:-\angStart:1.1);
  \draw[black!30!green] (180-\angStart:1.2) arc (180-\angStart:360+\angStart:1.2);
  \draw[orange] (180-\angStart:1.3) arc (180-\angStart:180+\angStart:1.3);
  \draw[black!30!orange] (-\angStart:1.3) arc (-\angStart:+\angStart:1.3);
  \node[cyan,right] at (180:1){\textsf{U1}};
  \node[black!30!green,left] at (0:1){\textsf{U2}};
  \node[orange,left] at (180:1.3){\textsf{W1}};
  \node[black!30!orange,right] at (0:1.3){\textsf{W2}};

\begin{tikzpicture}[very thick, line join=round]
  \draw (0,0) circle (1);
  \draw[dashed] (0:1) arc (0:180:1 and 1*\zfactor);\draw (180:1) arc (180:360:1 and 1*\zfactor);
  \draw[gray,dashed] (0:1.2) arc (0:180:1.2 and 1.2*\zfactor);
  \fill[fill=cyan,opacity=0.4] (-\angStart:1.2) arc (-\angStart:180+\angStart:1.2) 
  arc (180+3:360-3:{1.2*cos(\angStart)} and {1.2*\zfactor*cos(\angStart)}) -- cycle;
  \draw[gray] (180:1.2) arc (180:360:1.2 and 1.2*\zfactor);
  \draw[gray] (-\angStart:1.2) arc (-\angStart:180+\angStart:1.2) 
  arc (180+3:360-3:{1.2*cos(\angStart)} and {1.2*\zfactor*cos(\angStart)}) -- cycle;
  \draw[dashed] (0:1.4) arc (0:180:1.4 and 1.4*\zfactor);
  \fill[black!30!green,opacity=0.4] (180-\angStart:1.4) arc (180-\angStart:360+\angStart:1.4)
  arc (-3:-180+3:{1.4*cos(\angStart)} and {1.4*\zfactor*cos(\angStart)}) -- cycle;
  \draw (180:1.4) arc (180:360:1.4 and 1.4*\zfactor);
  \draw[] (180-\angStart:1.4) arc (180-\angStart:360+\angStart:1.4)
  arc (-3:-180+3:{1.4*cos(\angStart)} and {1.4*\zfactor*cos(\angStart)}) -- cycle;

enter image description here

| improve this answer | |
  • I tried the following: – matemagreek Jul 4 '17 at 20:40

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