eq2tex

#!/bin/bash
set -e   # exit on error 

# Used by eq2* 
# 
# See currently hard-coded font options.
#
# Use EQFONTSZ for font size.
#
# Gokberk Cinbis, June 2012

# Write a wrapper around the equation to get tex file.
#function eq2tex() {
#echo "EQUATION:" "$1"
#echo "NAME:" "$2"

if [ $# -ne 2 ]
then
    eq2help
    #return 1
    exit 1 
fi

out="$2".tex

# font size
# not needed anymore: local fontsz
if [ -z "$EQFONTSZ" ]
then 
    fontsz=12
else
    fontsz="$EQFONTSZ"
fi
echoblue Font size=$fontsz

# create latex file
echo "\documentclass[12pt,a4paper]{article}" > "$out"
echo "\usepackage{pgfpages}" >> "$out"
echo "\usepackage{amsmath}" >> "$out"
echo "\usepackage{amssymb}" >> "$out"

# NOTE MANUALLY DEFINE FONT, todo: make this environment variable.
#echo "\usepackage{mathptmx}" >> "$out" # times
echo "\usepackage[cm]{sfmath}" >> "$out" # computer modern sans serif, like beamer.

# use page scaling to set the size of the font.
# a4 is 11.7in x 8.3in
mywidth=`echo "scale=2;8.3*${fontsz}/12"|bc`
myheight=`echo "scale=2;11.7*${fontsz}/12"|bc`
echo "\pgfpagesuselayout{resize to}[physical paper width=${mywidth}in,physical paper height=${myheight}in]" >> "$out"

echo "\pagestyle{empty}" >> "$out"
echo "\begin{document}" >> "$out"
echo "\begin{equation*}" >> "$out"
echo "$1" >> "$out"
echo "\end{equation*}" >> "$out"
echo "\end{document}" >> "$out"

cat "$out"
#}

################ obsolete ################ 

# -- these are not good since they require fonts explicitly. instead we should scale the whole thing --
#echo "\documentclass[extrafontsizes,${fontsz}pt]{memoir}" > "$out" # works not as I want
#\DeclareMathSizes{display size}{text size}{script size}{scriptscript size}.
#echo "\DeclareMathSizes{12pt}{${fontsz}}{${fontsz}}{${fontsz}}" >> "$out"
#echo "\fontsize{${fontsz}}{1}\selectfont" >> "$out"

# -- example to get arial font in text, but doesnot modify equation fonts! --
#echo "\renewcommand{\rmdefault}{phv}" > "$out"
#echo "\renewcommand{\sfdefault}{phv}" > "$out"
# similarly, sans serif
# \renewcommand{\familydefault}{\sfdefault}