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#!/usr/bin/perl -w
#
# $Id$
#
use English;
sub load_file {
local $filename = shift;
local %R = ();
open (XF, $filename)
|| die "Cannot open $filename\n";
while (<XF>) {
chomp;
local @f = split(/\s+/, $_);
$R{$f[0]} = $f[1];
}
close(XF);
return %R;
}
sub interpolate {
local %T = @_;
local %R = ();
local $last_i;
foreach my $i (sort keys %T) {
if (!defined $last_i) {
$last_i = $i;
$R{$i} = $T{$i};
next;
}
local $si = $last_i + 1;
while ($si < $i) {
$R{$si} = $T{$last_i} + ($si - $last_i) * ($T{$i} - $T{$last_i}) / ($i - $last_i);
$si++;
}
$last_i = $i;
$R{$i} = $T{$i};
}
return %R;
}
sub range {
local @values = @_;
local ($min_i, $max_i);
foreach my $i (@values) {
if (!defined $min_i
|| $i < $min_i) {
$min_i = $i;
}
if (!defined $max_i
|| $i > $max_i) {
$max_i = $i;
}
}
return ($min_i, $max_i);
}
local %BX = load_file($ARGV[0]);
print STDERR "X loaded\n";
local %BY = load_file($ARGV[1]);
print STDERR "Y loaded\n";
local %X = %BX; interpolate (%BX);
local %Y = %BY; interpolate (%BY);
local ($min_i, $max_i) = range(keys %X);
local ($min_j, $max_j) = range(keys %Y);
print STDERR "RANGE[X] = $min_i, $max_i\n";
print STDERR "RANGE[Y] = $min_j, $max_j\n";
local $total = 0;
foreach my $i (($min_i - $max_j)..($max_i - $min_j)) {
local $z = 0;
foreach my $j (-$max_j..-$min_j) {
local $f = 0;
local $g = 0;
if (defined $X{$i - $j}) {
$f = $X{$i - $j};
}
if (defined $Y{-$j}) {
$g = $Y{-$j};
}
$z += $f * $g;
}
print $i, " ", $z, "\n";
$total += $z;
}
print STDERR "TOTAL = $total\n";
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