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a pretty nearly working gtkconsole...
[spider.git]
/
perl
/
DXBearing.pm
diff --git
a/perl/DXBearing.pm
b/perl/DXBearing.pm
index e7736f8a138d64a367865bce605631389f96f861..e3aac65e9ffee4ae8b18ae308104fcc7b9601769 100644
(file)
--- a/
perl/DXBearing.pm
+++ b/
perl/DXBearing.pm
@@
-13,8
+13,8
@@
package DXBearing;
package DXBearing;
-use POSIX;
use DXUtil;
use DXUtil;
+use POSIX qw(:math_h);
use strict;
use vars qw($pi);
use strict;
use vars qw($pi);
@@
-95,12
+95,12
@@
sub bdist
my $e = dr(shift);
return (0, 0) if $hn == $n && $he == $e;
my $co = cos($he-$e)*cos($hn)*cos($n)+sin($hn)*sin($n);
my $e = dr(shift);
return (0, 0) if $hn == $n && $he == $e;
my $co = cos($he-$e)*cos($hn)*cos($n)+sin($hn)*sin($n);
- my $ca =
atan(abs(sqrt(1-$co*$co)/$co))
;
+ my $ca =
$co ? atan(abs(sqrt(1-$co*$co)/$co)) : $pi
;
$ca = $pi-$ca if $co < 0;
my $dx = 6367*$ca;
my $si = sin($e-$he)*cos($n)*cos($hn);
$co = sin($n)-sin($hn)*cos($ca);
$ca = $pi-$ca if $co < 0;
my $dx = 6367*$ca;
my $si = sin($e-$he)*cos($n)*cos($hn);
$co = sin($n)-sin($hn)*cos($ca);
- my $az =
atan(abs($si/$co))
;
+ my $az =
$co ? atan(abs($si/$co)) : $pi
;
$az = $pi - $az if $co < 0;
$az = -$az if $si < 0;
$az = $az+2*$pi if $az < 0;
$az = $pi - $az if $co < 0;
$az = -$az if $si < 0;
$az = $az+2*$pi if $az < 0;