note 99318 added to function.atan2

This function will return degree by vertex coordinates in general trigonometrical coordinate system where zero is located at position (1, 0), 90' at (0, 1), 180' at (-1, 0) and so on. <?php function GetDegree($x, $y) { // we don't want to cause division by zero if($x == 0) $x = 1 / 10000; $deg = rad2deg(atan(abs($y / $x))); if($y >= 0) $deg = $x < 0 ? 180 - $deg : $deg; else $deg = $x < 0 ? 180 + $deg : 360 - $deg; return $deg; } ?> ---- Server IP: 78.41.111.10 Probable Submitter: 78.107.255.44 ---- Manual Page -- http://www.php.net/manual/en/function.atan2.php Edit -- https://master.php.net/note/edit/99318 Del: integrated -- https://master.php.net/note/delete/99318/integrated Del: useless -- https://master.php.net/note/delete/99318/useless Del: bad code -- https://master.php.net/note/delete/99318/bad+code Del: spam -- https://master.php.net/note/delete/99318/spam Del: non-english -- https://master.php.net/note/delete/99318/non-english Del: in docs -- https://master.php.net/note/delete/99318/in+docs Del: other reasons-- https://master.php.net/note/delete/99318 Reject -- https://master.php.net/note/reject/99318 Search -- https://master.php.net/manage/user-notes.php