Circle with more than one "marking"

Question

I was experimenting with

\draw[
     decoration={markings, mark=at position 0.75 with {\arrow[scale=2]{<}}},
     postaction={decorate}
     ] 
     (0,0) circle (2);

and replaced it with

\draw[
     decoration={markings, mark=at position 0.75 with {\arrow[scale=2]{<}}, 
       mark=at position 0.62 with {\fill circle (2pt);}},
     postaction={decorate}
     ] 
     (0,0) circle (2);

i.e. I am trying to put several markings along the circle.

At first I thought I was doing it correctly, just to notice that this doesn't answer my concern 100% as this implementation somehow ruined the alignment of the markings, i.e. either the arrow or the point is off the circle and not really along the circle.

Any suggestions?

Thanks a lot!

Answer 1

The PGFmanual states on page 328 that

[i]t is possible to give the mark option several times, which causes several markings to be applied. In this case, however, it is necessary that the positions on the path are in increasing order. That is, it is not allowed (and will result in chaos) to have a marking that lies earlier on the path to follow a marking that is later on the path.

Thus, you need to do exactly this:

\draw[
  decoration={
    markings,
    mark=at position 0.62 with {\fill circle [radius=+2pt]);},
    mark=at position 0.75 with {\arrow[scale=2]{<}}},
  postaction={decorate}
 ] (0,0) circle [radius=2];

---

Of course, you could just do

\fill (.62*360:2) circle [radius=+2pt];

for the circular marking, but that is another topic.