# Question about the pamameters of Arcto in sverchok's "Profile Parametric Node"

<2v rx,ry> <float rot> <int flag1> <int flag2> <2v x,y> <int num_verts> [z]


As the syntax above shows，ArcTo has 3 parameters（ float rot, int flag1 and int flag2 ） between the radius vector and the coordinate vecter.
I've found that the third(int flag2) can be used to set the direction of the arc(CW or CCW),but I can't find out what the other 2 parameters( float rot and int flag1 ) stand for and can be used to do.
It will be kind of you to tell me the answer, and thanks in advance.^_^

• We (team sverchok) encourage you to use the github issue tracker to tell us which parts of our documentation are unclear. We try to cover everything but sometimes might gloss over some details like this. Nov 23, 2015 at 11:20

;; straight from the svg specs