TikZ: Arrow pointing to circle from inside through two points

Multi tool use
Multi tool use

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP





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Originally posted here; this comment suggested that I ask this question on this site instead.



The code at the bottom produces the correct drawing, shown below. The issue is that I don't think I drew it in the best way possible; in particular, I really don't like having to construct (X) or (Y) (I would rather specify that the radius is 2 and that the ray should go in the direction of (p)).



Can someone show me a better way?



begintikzpicture
node [fill=black, shape=circle, inner sep=1pt, label=below:$O$] (O) at (0,0) ;
node [fill=black, shape=circle, inner sep=1pt, label=below:$p$] (p) at (0.6,1.2) ;
node [fill=black, shape=circle, inner sep=1pt, label=below:$f(p)$] (fp) at 
(-1.2,0.7) ;
coordinate (X) at (2,0);
coordinate (Y) at (2.4, 1.7);
node (C) [name path=C, draw, circle through=(X)] at (O) ;
path [name path=fp--Y] (fp)--(Y);
path [name intersections=of=fp--Y and C, by=F];
node [fill=black, shape=circle, inner sep=1pt, label=right:$r(p)$] (rp) at (F) ;
draw [->] (fp)--(rp);
endtikzpicture


Correct output




graphics tex




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    up vote
    4
    down vote

    favorite












    Originally posted here; this comment suggested that I ask this question on this site instead.



    The code at the bottom produces the correct drawing, shown below. The issue is that I don't think I drew it in the best way possible; in particular, I really don't like having to construct (X) or (Y) (I would rather specify that the radius is 2 and that the ray should go in the direction of (p)).



    Can someone show me a better way?



    begintikzpicture
    node [fill=black, shape=circle, inner sep=1pt, label=below:$O$] (O) at (0,0) ;
    node [fill=black, shape=circle, inner sep=1pt, label=below:$p$] (p) at (0.6,1.2) ;
    node [fill=black, shape=circle, inner sep=1pt, label=below:$f(p)$] (fp) at 
    (-1.2,0.7) ;
    coordinate (X) at (2,0);
    coordinate (Y) at (2.4, 1.7);
    node (C) [name path=C, draw, circle through=(X)] at (O) ;
    path [name path=fp--Y] (fp)--(Y);
    path [name intersections=of=fp--Y and C, by=F];
    node [fill=black, shape=circle, inner sep=1pt, label=right:$r(p)$] (rp) at (F) ;
    draw [->] (fp)--(rp);
    endtikzpicture


    Correct output




    graphics tex




    share|improve this question





















      up vote
      4
      down vote

      favorite









      up vote
      4
      down vote

      favorite











      Originally posted here; this comment suggested that I ask this question on this site instead.



      The code at the bottom produces the correct drawing, shown below. The issue is that I don't think I drew it in the best way possible; in particular, I really don't like having to construct (X) or (Y) (I would rather specify that the radius is 2 and that the ray should go in the direction of (p)).



      Can someone show me a better way?



      begintikzpicture
      node [fill=black, shape=circle, inner sep=1pt, label=below:$O$] (O) at (0,0) ;
      node [fill=black, shape=circle, inner sep=1pt, label=below:$p$] (p) at (0.6,1.2) ;
      node [fill=black, shape=circle, inner sep=1pt, label=below:$f(p)$] (fp) at 
      (-1.2,0.7) ;
      coordinate (X) at (2,0);
      coordinate (Y) at (2.4, 1.7);
      node (C) [name path=C, draw, circle through=(X)] at (O) ;
      path [name path=fp--Y] (fp)--(Y);
      path [name intersections=of=fp--Y and C, by=F];
      node [fill=black, shape=circle, inner sep=1pt, label=right:$r(p)$] (rp) at (F) ;
      draw [->] (fp)--(rp);
      endtikzpicture


      Correct output




      graphics tex




      share|improve this question











      Originally posted here; this comment suggested that I ask this question on this site instead.



      The code at the bottom produces the correct drawing, shown below. The issue is that I don't think I drew it in the best way possible; in particular, I really don't like having to construct (X) or (Y) (I would rather specify that the radius is 2 and that the ray should go in the direction of (p)).



      Can someone show me a better way?



      begintikzpicture
      node [fill=black, shape=circle, inner sep=1pt, label=below:$O$] (O) at (0,0) ;
      node [fill=black, shape=circle, inner sep=1pt, label=below:$p$] (p) at (0.6,1.2) ;
      node [fill=black, shape=circle, inner sep=1pt, label=below:$f(p)$] (fp) at 
      (-1.2,0.7) ;
      coordinate (X) at (2,0);
      coordinate (Y) at (2.4, 1.7);
      node (C) [name path=C, draw, circle through=(X)] at (O) ;
      path [name path=fp--Y] (fp)--(Y);
      path [name intersections=of=fp--Y and C, by=F];
      node [fill=black, shape=circle, inner sep=1pt, label=right:$r(p)$] (rp) at (F) ;
      draw [->] (fp)--(rp);
      endtikzpicture


      Correct output





      graphics tex





      share|improve this question










      share|improve this question




      share|improve this question









      asked Apr 6 at 14:41









      alphacapture

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