Bigger items first?

[nk-alex]

I have seen this output with the following execution: Having a container:

Id	Length	Width	Height
1	12	8	8

Having three items:

Id	Dim1	Dim2	Dim3	Quantity
3	8	12	2	2
2	8	12	1	1
1	2	4	2	2

Result:

Item Id	Coord x	Coord y	Coord z
3	0	0	0
3	0	2.0	0
1	0	4.0	0
1	4.0	4.0	0
2	0	6.0	0

Which graphically would be this:

Is it a way to force the algorithm to use bigger items first so the purple items would be above the red and yellow ones? I'm just trying to achieve a more "human" output of the algorithm without messing up the results.