.htaccess for either redirecting to subdomain or applying certain rules

mrN

I am hosting a zend framework project on a subdomain. Lets say, project.mydomain.com. This domain however can be accessed from mydomain.com/project as well. Now, to avoid the complexity of having to maintain two different cases, I am trying to minimize the complexity by redirecting the directly accessed path to the subdomain, i.e.

mydomain.com/project > project.mydomain.com

but, if the same direcoty is accessed using subdomain, then i want some rules to be applied to it as well.

Here is my currect .htaccess which is allowing me to use direct path i.e mydomain.com/project/

RewriteEngine On

# Exclude some directories from URI rewriting
#RewriteRule ^(dir1|dir2|dir3) - [L]

RewriteRule ^.htaccess$ - [F]

RewriteCond %{REQUEST_URI} =""
RewriteRule ^.*$ /projects/myproject.com/public/index.php [NC,L]

RewriteCond %{REQUEST_URI} !^/public/.*$
RewriteRule ^(.*)$ /projects/myproject.com/public/$1

RewriteCond %{REQUEST_FILENAME} -f
RewriteRule ^.*$ - [NC,L]

RewriteRule ^public/.*$ /projects/myproject.com/public/index.php [NC,L]

Next, I will write a .htaccess for subdomain only. But, I want the directly accessed path to be redirected to the subdomain. How to do this redirection through .htaccess?

Please note, redirecting through a php file is not a option.