pstricks-add 3.49 (18jan11)

git-svn-id: svn://tug.org/texlive/trunk@21119 c570f23f-e606-0410-a88d-b1316a301751

3 files changed, 47 insertions, 4 deletions

diff --git a/Master/texmf-dist/doc/generic/pstricks-add/Changes b/Master/texmf-dist/doc/generic/pstricks-add/Changes
index ea4a67a0325..e9a470d06ba 100644
--- a/Master/texmf-dist/doc/generic/pstricks-add/Changes
+++ b/Master/texmf-dist/doc/generic/pstricks-add/Changes
@@ -1,4 +1,4 @@
-%% $Id: Changes 439 2010-12-18 18:45:23Z herbert $
+%% $Id: Changes 445 2011-01-18 18:43:16Z herbert $
 %%
 pstricks-add.pro ----------- 
 0.23 2009-12-20 - add RGBtoGRAY and WavelengthToGRAY
@@ -39,6 +39,8 @@ pstricks-add.sty ----------- (hv)
 
 
 pstricks-add.tex ----------- (Dominik Rodriguez/hv)
+ v 3.49  2011-01-18 - add macro \psEllipseTangents for drawing tangent
+                      lines of a point and an ellipse.
  v 3.48  2010-12-18 - add macro \psCircleTangents for drawing tangent
                       lines of a point and a circle or two circles.
  v 3.47  2010-12-14 - save the absolute coordinates of \psVector in node names
diff --git a/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.pdf b/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.pdf
index b2947990e5a..ba27a113b54 100644
--- a/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.pdf
+++ b/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.pdf
diff --git a/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.tex b/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.tex
index 8cdd5d020d9..88c43ec9e10 100644
--- a/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.tex
+++ b/Master/texmf-dist/doc/generic/pstricks-add/pstricks-add-doc.tex
@@ -1,4 +1,4 @@
-%% $Id: pstricks-add-doc.tex 439 2010-12-18 18:45:23Z herbert $
+%% $Id: pstricks-add-doc.tex 445 2011-01-18 18:43:16Z herbert $
 \documentclass[11pt,english,BCOR10mm,DIV12,bibliography=totoc,parskip=false,smallheadings
     headexclude,footexclude,oneside]{pst-doc}
 \listfiles
@@ -336,12 +336,12 @@ and \verb=CircleT2=.
 \end{lstlisting}
 
 \bigskip
-When using the other variant of the macro two circles must be given. THe macro then defines
+When using the other variant of the macro two circles must be given. The macro then defines
 ten nodes, named \verb=CircleTC1= and \verb=CircleTC2= for the two intersection points,
  \verb=CircleTO1=, \verb=CircleTO2=, \verb=CircleTO3=, and \verb=CircleTO4= for the four
  nodes of the outer tangent lines and 
   \verb=CircleTI1=, \verb=CircleTI2=, \verb=CircleTI3=, and \verb=CircleTI4= for the
-  four nodes of the inenr tangent lines.
+  four nodes of the inner tangent lines.
 
 \bigskip
 \begin{pspicture}[showgrid](-2,-2)(10,10)
@@ -383,6 +383,47 @@ ten nodes, named \verb=CircleTC1= and \verb=CircleTC2= for the two intersection
 
 
 \clearpage
+
+%--------------------------------------------------------------------------------------
+\section{\nxLcs{psEllipseTangents}: Calculating tangent lines of an ellipse}
+%--------------------------------------------------------------------------------------
+
+The macro calculates the two points on an ellipse where tangent lines from an outside  point
+ are drawn.
+
+\begin{BDef}
+\Lcs{psEllipseTangents}\Largr{$x_0,y_0$}\Largr{$a,b$}\Largr{$x_p,y_p$}\\
+\end{BDef}
+
+The first two pairs of coordinates are the same as the ones for the default ellipse.
+The names of the calculates node names are \verb=EllipseT1=
+and \verb=EllipseT2=.
+
+\bigskip
+\begin{pspicture}[showgrid](0,3)(10,10)
+\psdot(2,4)\psellipse(7,7)(3,1.5)
+\psEllipseTangents(7,7)(3,1.5)(2,4)
+\pcline[nodesep=-1cm,linecolor=blue](2,4)(EllipseT1)
+\pcline[nodesep=-1cm,linecolor=blue](2,4)(EllipseT2)
+\psdots(EllipseT1)(EllipseT2)
+\uput[-80](EllipseT1){T1}\uput[115](EllipseT2){T2}
+\end{pspicture}
+
+
+\begin{lstlisting}
+\begin{pspicture}[showgrid](0,3)(10,10)
+\psdot(2,4)\psellipse(7,7)(3,1.5)
+\psEllipseTangents(7,7)(3,1.5)(2,4)
+\pcline[nodesep=-1cm,linecolor=blue](2,4)(EllipseT1)
+\pcline[nodesep=-1cm,linecolor=blue](2,4)(EllipseT2)
+\psdots(EllipseT1)(EllipseT2)
+\uput[-80](EllipseT1){T1}\uput[115](EllipseT2){T2}
+\end{pspicture}
+\end{lstlisting}
+
+
+\clearpage
+
 %--------------------------------------------------------------------------------------
 \section{\nxLcs{psrotate}: Rotating objects}
 %--------------------------------------------------------------------------------------