Add 3D Printing weights and dims to WooCommerce cart objects

3dp_wc-functions.php

/**
 * Add 3DPrint weight and dimensions to WooCommerce cart item objects
 * @author mike@curren.me
 *
 * @requires WooCommerce plugin - https://woocommerce.com/
 * @requires Wordpress 3D Printing plugin - http://www.wp3dprinting.com/
 */

function add_3dp_stats_to_wc_cart_objects( $cart_object ) {

    if ( (is_admin() && ! defined( 'DOING_AJAX' ) ) || $cart_object->is_empty() )
        return;

    foreach ( $cart_object->get_cart() as $cart_item ) {
        /**
         * Set cart item weight
         * NOTE: must multiply integer by 1000 to move decimal over 3 places 
         * maybe raw dump is incorrect because of float() wrap from plugin ???
         */
        $cart_item['data']->set_weight( $cart_item['3dp_options']['weight'] * 1000 );

        /**
         * Set cart item dimensions
         */
        $cart_item['data']->set_width( $cart_item['3dp_options']['width'] );        
        $cart_item['data']->set_height( $cart_item['3dp_options']['height'] );        
        $cart_item['data']->set_length( $cart_item['3dp_options']['length'] );
    }

    /**
     * Debugging info 
     * NOTE: un-comment below to show total cart weight on WooCommerce Cart page
     */
    // echo '<pre>Cart weight: '; print_r( $cart_object->get_cart_contents_weight() ); echo '</pre><br>';
}
add_action( 'woocommerce_before_calculate_totals', 'add_3dp_stats_to_wc_cart_objects', 10, 1);