[pstricks] multido+rotation

[E. Krishnan]

On Sat, 13 Jan 2007, Doris Wagner wrote:

> hi list,
> 
> I have the following problem: I want to draw something (always the same 
> thing) several times, each time rotated about the same center (which is 
> (0,0)) and with the same angle (such that after k repetitions, I arrive 
> at 360 degrees)


Here's a (slightly more general) soltion, which rotates an object any 
number of times (finally returning to the original position) about any 
point (not necessarily the origin)

First  make the definition

  \def\multirot(#1,#2)#3#4{%
    \multido{\i=0+1}{#3}{%
      \SpecialCoor
      \degrees[#3]
      \rput{\i}(#1,#2){%
        \rput(-#1,-#2){#4}}}}


Now try something like


   \begin{center}
     \begin{pspicture}(-2,-2)(4,6)
      \multirot(1,2){7}{%
        \psframe(1,2)(4,3)}
     \end{pspicture}
   \end{center}



-- 
Krishnan