%  P L A C E I N S . S T Y          ver 1.0  Dec 1, 1995
%  Donald Arseneau                  asnd@reg.triumf.ca
%  Keep floats `in their place'; don't let them float into another section.
%  Instructions are below.

\def\@fb@botlist{\@botlist}
\@ifundefined{DeclareOption}{}%
{\DeclareOption{below}{\def\@fb@botlist{}}
 \DeclareOption{section}{\expandafter\renewcommand\expandafter\section
     \expandafter{\expandafter\FloatBarrier\section}}
 \ProvidesPackage{placeins}[1995/12/01 \space  v 1.0]
 \ProcessOptions }

\def\FloatBarrier{\par\begingroup \let\@elt\relax
 \edef\@tempa{\@fb@botlist\@deferlist\@dbldeferlist}%
 \ifx\@tempa\@empty \else
     \ifx\@fltovf\relax % my indicator of recursion
         \if@firstcolumn %\message{Some floats are stuck.}%
            \clearpage 
         \else %\message{Eject a column and check again:}%
            \null\newpage\FloatBarrier 
         \fi
     \else %\message{Must dump some floats.}%
         \newpage \let\@fltovf\relax %\message{Check again:}%
         \FloatBarrier % recurse once only
 \fi \fi \endgroup}
\endinput

 ==============  I N S T R U C T I O N S ==============

Placeins.sty keeps floats `in their place', preventing them from floating
past a "\FloatBarrier" command into another section.  To use it, declare
"\usepackage{placeins}" or "\documentstyle[placeins...", and insert
"\FloatBarrier" at places that floats should not move past, perhaps before
every "\section".

A more convenient way to use it is to change the definition of "\section"
by placing "\FloatBarrier" before "\@startsection" or into the font 
specification; for example:

    % \makeatletter % Use \makeatletter if you put this in your main document
    \renewcommand\section{\@startsection {section}{1}{\z@}%
       {-3.5ex \@plus -1ex \@minus -.2ex}%
       {2.3ex \@plus.2ex}%
       {\FloatBarrier\normalfont\Large\bfseries}}
    % \makeatother % Use \makeatother if you put this in your main document

(See The LaTeX Companion, section 2.3.)  If you specify 
"\usepackage[section]{placeins}", then "\section" will be redefined 
with \Floatbarrier" inserted at the beginning.

Something you may not like is that this style is very strict, and will 
prevent a figure from an old section from appearing below the start of 
a new section, even though some of the old section may be on the same
page.  To let the new section start immediately, and the figure to go 
below it, declare "\usepackage[below]{placeins}".

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