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@ 2014-09-18T16:57:57Z

<?php
function d($t, $o){
	$t = deg2rad($t);
	$o = deg2rad($o);
	if($t<0)$t += M_PI*2;
	if($o<0)$o += M_PI*2;
	$diff = abs($t-$o);
	$diff = min( M_PI*2 - $diff, $diff);
	echo rad2deg($diff)
.PHP_EOL;
}

d(-1,1);//2
d(-90,90);//180
d(1,3);
d(-179,179);//2
d(-1,-3);

Output
Performance
VLD
References
Branches

abs: documentation ( source)
rad2deg: documentation ( source)
min: documentation ( source)
deg2rad: documentation ( source)

preferences:dark modelive preview

55.87 ms | 402 KiB | 5 Q