Genesis Grid Loop - Part 3

functions.php

<?php

/**
 * Add some extra body classes to grid posts.
 * 
 * Change the $columns value to alter how many columns wide the grid uses.
 *
 * @author Gary Jones
 * @link   http://code.garyjones.co.uk/genesis-grid-loop-advanced/
 * 
 * @global array   $_genesis_loop_args
 * @global integer $loop_counter
 *
 * @param array $grid_classes 
 */
function child_grid_loop_post_class( $grid_classes ) {

	global $_genesis_loop_args, $loop_counter;

	// Alter this number to change the number of columns - used to add class names
	$columns = 3;

	// Only want extra classes on grid posts, not feature posts
	if ( $loop_counter >= $_genesis_loop_args['features'] ) {
		// Add genesis-grid-column-? class to know how many columns across we are
		$grid_classes[] = sprintf( 'genesis-grid-column-%s', ( ( $loop_counter - $_genesis_loop_args['features'] ) % $columns ) + 1 );
		
		// Add size1of? class to make it correct width
		$grid_classes[] = sprintf( 'size1of%s', $columns );
	}

	return $grid_classes;

}