TikZ: Arrow pointing to circle from inside through two points

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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