Possibility of "Length + Girth" restriction on a "Box" (and other variable dimensions)

[MarkBFamFour]

Hi,

This is a really great library and it could be extremely useful for us.

I wondered if it would be possible to implement a "Length + Girth" style restriction on a "Box" item?

We use some carriers who have a maximum length and a maximum length + girth (length + (2*width) +(2*depth)) and it'd be nice to be able to fit a list of items into a 'flexible' box or container of this type, where the total of the "Length + Girth" is always inside the requirements but the box itelf can adapt to item sizes. I realize this is a much more complex task, but it'd be incredibly useful.

For example:

Given:

• Max Length of 2750mm
• Max Length + Girth of 4000mm
• Max Weight of 25000g

List of parts:

• 1420mm x 100mm x 100mm item will fit
• 2750mm x 312mm x 312mm item will fit
• 2000mm x 750mm x 750mm item will NOT fit

Thanks,