pst-tools (24mar20)

git-svn-id: svn://tug.org/texlive/trunk@54518 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 57 insertions, 5 deletions

diff --git a/Master/texmf-dist/doc/generic/pst-tools/pst-tools-doc.tex b/Master/texmf-dist/doc/generic/pst-tools/pst-tools-doc.tex
index 2473feb2fed..9296568bc34 100644
--- a/Master/texmf-dist/doc/generic/pst-tools/pst-tools-doc.tex
+++ b/Master/texmf-dist/doc/generic/pst-tools/pst-tools-doc.tex
@@ -1,6 +1,6 @@
-%% $Id: pst-tools-doc.tex 675 2017-12-03 08:39:12Z herbert $
+%% $Id: pst-tools-doc.tex 1163 2020-03-24 09:47:58Z herbert $
 \documentclass[11pt,english,BCOR=10mm,DIV=13,toc=bibliography,parskip=false,
-   headings=small, headinclude=false,footinclude=false,oneside]{pst-doc}
+   headings=small,headinclude=false,footinclude=false,oneside]{pst-doc}
 \usepackage[utf8]{inputenc}
 \usepackage{pst-tools}
 \let\pstToolsFV\fileversion
@@ -24,7 +24,7 @@
 
 \begin{abstract}
 This package defines some tools which are useful for all packages not only the PSTricks like packages.
-
+Since the version 0.10 it includes the macros from \texttt{random.tex}.
 \vfill
 \noindent
 Thanks to:  
@@ -188,7 +188,7 @@ It must be a comma separated list.
 
 
 \begin{lstlisting}
-\psRegisterList{Color}{violet,blue,green,red}% defines macro \Color
+\psRegisterList{Color}{yellow,blue,green,red}% defines macro \Color
 \begin{pspicture}(-7,-4.5)(7,5.5)
 \psaxes{->}(0,0)(-6.5,-4.5)(6.75,5)
 \psset{plotpoints=400,algebraic,linewidth=1pt,fillstyle=solid,opacity=0.4}
@@ -201,7 +201,7 @@ It must be a comma separated list.
 \end{pspicture}
 \end{lstlisting}
 
-\psRegisterList{Color}{violet,blue,green,red}% defines macro \Color
+\psRegisterList{Color}{yellow,blue,green,red}% defines macro \Color
 \begin{pspicture}(-7,-4.5)(7,5.5)
 \psaxes{->}(0,0)(-6.5,-4.5)(6.75,5)
 \psset{plotpoints=400,algebraic,linewidth=1pt,fillstyle=solid,opacity=0.4}
@@ -213,6 +213,58 @@ It must be a comma separated list.
 \end{pspicture}
 
 
+
+\section{Random numbers}
+The file \LFile{random.tex} from Donald Arseneau is no more part of CTAN due to a missing licence statement. 
+\LFile{pst-tools} at version 0.10 includes the code. The documentation was inside the package otself:
+
+Random integers are generated in the range 1 to 2147483646 by the
+macro \Lcs{nextrandom}.  The result is returned in the counter \Lcs{randomi}.
+Do not change \Lcs{randomi} except, perhaps, to initialize it at some
+random value.  If you do not initialize it, it will be initialized
+using the time and date.  (This is a sparse initialization, giving
+fewer than a million different starting values, but you should use
+other sources of numbers if they are available--just remember that
+most of the numbers available to TeX are not at all random.)
+
+The \Lcs{nextrandom} command is not very useful by itself, unless you
+have exactly 2147483646 things to choose from.  Much more useful
+is the \Lcs{setrannum} command which sets a given counter to a random
+value within a specified range.  There are three parameters:
+
+\Lcs{setrannum\{<counter>\}\{<minimum>\}\{<maximum>\}}  
+
+For example, to
+simulate a die-roll: 
+
+\verb|\setrannum{\die}{1}{6}| \verb|\ifcase\die...| .
+
+If you need random numbers that are not integers, you will have to
+use dimen registers and \Lcs{setrandimen}.  For example, to set a random
+page width: 
+
+\Lcs{setrandimen} \Lcs{hsize\{3in\}\{6.5in\}}
+
+ The »\Lcs{pointless}« macro
+will remove the »pt« that TeX gives so you can use the dimensions
+as pure `real' numbers.  In that case, specify the range in pt units.
+For example,
+
+  \verb|\setrandimen\answer{2.71828pt}{3.14159pt}|
+
+  The answer is \verb|\pointless\answer|.
+
+The random number generator is the one by Lewis, Goodman, and Miller
+(1969) and used as \texttt{ran0} in »Numerical Recipies« using Schrage's
+method for avoiding overflows.  The multiplier is $16807 (7^5)$, the
+added constant is 0, and the modulus is $2147483647 (2^{31}-1)$.  The
+range of integers generated is $1 - 2147483646$.  A smaller range would
+reduce the complexity of the macros a bit, but not much--most of the
+code deals with initialization and type-conversion.  On the other hand,
+the large range may be wasted due to the sparse seed initialization.
+
+
+
 \section{List of the defined PostScript functions}
 
 \footnotesize