Andrei
The below in dealing with associated products will suffer from same problem as the other non-cube root method in volume calculation. Both the addition (+) of the additional product dimensions in GetDimensions, as well as the GetAssociatedProductDimensions method itself. I think GetVolume and GetAssociatedProductVolume methods would be useful.
public virtual void GetDimensions(IList<GetShippingOptionRequest.PackageItem> packageItems,
...
if (_shippingSettings.UseCubeRootMethod)
...
GetAssociatedProductDimensions(shoppingCartItem, out associatedProductsWidth,
out associatedProductsLength, out associatedProductsHeight);
var productWidth = product.Width + associatedProductsWidth;
var productLength = product.Length + associatedProductsLength;
var productHeight = product.Height + associatedProductsHeight;
public virtual void GetAssociatedProductDimensions(ShoppingCartItem shoppingCartItem,
...
foreach (var attributeValue in attributeValues)
...
width += associatedProduct.Width*attributeValue.Quantity;
length += associatedProduct.Length * attributeValue.Quantity;
height += associatedProduct.Height*attributeValue.Quantity;
