note 60597 added to function.atan

to obtain the direction of the line, you are better to use the <? atan2((y2-y1)/(x2-x1)) ?> function, since the regular atan function will only return arguments in the half-plane, ie. if y2-y1 and x2-x1 are negative, atan will give you an angle measurement less than 90 degrees, while it really should be between 180 and 270 ---- Manual Page -- http://www.php.net/manual/en/function.atan.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+60597 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+60597&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+60597&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+60597&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+60597&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+60597&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+60597&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+60597&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+60597&report=yes Search -- http://master.php.net/manage/user-notes.php