.HTACCESS hotlink help

i'm using the following rules in my .htaccess file to prevent hotlinking to my swf files and to redirect them:
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?example.com [NC]
RewriteRule \.(swf)$ http://www.example.com/hotlink.php [R,NC]

now how can i modify it so that the name of the file that was hotlinked be passed to the hotlink.php file.????

 

read this

http://altlab.com/htaccess_tutorial.html