#!/bin/bash

output=$2
if [ "$output" != "" ]; then
	output="set term postscript colour; set output \"$output\""
fi

field=$1
if [ "$field" == "" ]; then
	field="main.dat"
fi

plot="set contour base; set cntrparam level incremental -20,20,380; unset surface; set table \"cont.dat\"; splot \"$field\" u 1:2:3; unset table;"
plot="$plot $output; set xrange [0:500]; set yrange [0:377]; set zrange [-1:1]; set title \"TCS Electron Gun\"; unset key; set palette rgbformulae 33,13,10; plot \"$field\" w image, \"cont.dat\" w l lt -1 lw 1"
 #plot \"../egun.png\" binary filetype=png flipy w rgbimage"

if false; then
count=1
for i in electron*.dat; do
	if [ $count -eq 0 ]; then
		plot="$plot plot"
		count=1
	else
		plot="$plot,"
	fi
	plot="$plot \"$i\" u 2:3 w l lt -1 lw 1"
done
fi
gnuplot --persist -e "$plot"