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#======================================================================
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# . / P Y T H A G . P L
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# doc: Sun Aug 1 10:41:34 1999
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# dlm: Sun Aug 1 10:46:43 1999
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# (c) 1999 A.M. Thurnherr
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# uE-Info: 23 65 NIL 0 0 72 0 2 4 ofnI
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#======================================================================
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# PYTHAG routine from Numerical Recipes adapted to ANTS
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# HISTORY:
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# Aug 01, 1999: - manually converted from c-source
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sub pythag($$)
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{
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my($a,$b) = @_; # params
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my($absa,$absb); # float
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$absa = abs($a);
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$absb = abs($b);
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return $absa*sqrt(1.0+SQR($absb/$absa))
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if ($absa > $absb);
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return ($absb == 0 ? 0 : $absb*sqrt(1+$absa*$absa/$absb/$absb)));
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}
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