[pstricks] pstricks-add and the \psplotTangent* command

[Jacques RUBIN]

Hi!

I made the following code which works fine with PSTricks and the multido
package.
But..., in the "pstricks-add" documentation, it is written that the star
version \psplotTangent*  of the command \psplotTangent plots only the
tangent line in the positive x-direction. But that is wrong. It plots
only the tangent line in the positive y-direction instead, and it makes
this command completely unusable. It is really a bug.
Could it be rapidly corrected?

Best regards

Jacques

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
\begin{pspicture}
%
    \psset{unit=1}
%
    \psparametricplot[algebraic,arrows=->,arrowsize=4pt 2,linecolor=blue]%
    {1.4}{10.6}{(t^2)/9 | sin(t)+1}%
%
    \pscurvepoints{2}{11}{(t^2)/9 | sin(t)+1}{P}%
    \pspolylineticks[metricInitValue=1,ticksize=-2pt 2pt,%
            Os=1,Ds=.2,linecolor=red]{P}{ ds }{1}{66}
%
  
 \pspolylineticks[metricInitValue=1,Os=1,Ds=2,linewidth=1pt,ticksize=-4pt 4pt,%
            linecolor=Green!40]{P}{ ds }{0}{7}%
    \multido{\iA=1+1,\iB=3+2}{6}{%
                \uput{6pt}[d](PTick\iA){\tiny \iB}%
                }
%
    \def\P{sin(sqrt(9*x))+1}
    \def\Pd{cos(sqrt(9*x))*0.5*sqrt(9/x)}
    \multido{\n=1+2}{6}{\psplotTangent*[algebraic,%
          
 arrows=->,linecolor=orange,linewidth=.5pt,Derive=\Pd]{\n}{1}{\P}}
%
    \uput{13pt}[r]{0}(PTick66){ $s$ }
%

\end{pspicture}
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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