[pstricks] Ending a psline on pscircle

Herbert Voss Herbert.Voss at FU-Berlin.DE
Wed Feb 12 19:22:33 CET 2014

Am 12.02.2014 18:30, schrieb Rich Shepard:

>    When I draw a \psline from a point (whose coordinates I know from the
> grid
> and center of the \pscircle or \pselipse) to the boundary line of the
> \pscircle or \pselipse I end up tweaking the terminal coordinates until the
> line end (or terminal arrow point) just touches the boundary line. I'm
> certain there's a method to determining just what those terminal
> coordinates

I suppose you are looking for something like that




There is also a \psEllipseTangents(x0 , y0)(a, b)(xp, yp)


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