thanks for the feedback.
i think i write something explaining that in the tutorial but perhaps forget.
The idea its begin doing a fixed 4x2 inventory, but the goal its have two variables for specified the number of slots and arrangement (Horizontal and Vertical) and of course a function for do that without c&p.
I keep simple for learning purpose, i think its better for understand then how works that function, the transition between “manually & automatic”, and how optimice the code and do the things better.
My Idea its change (evolve) the code a bit in each tutorial to a more complicated one, for that i going to modify things and delete other like this for build a function. I already have that function written and other more advance stuff but if i do that at the begin i think many people get lost and not going to undestand how my inventory/hud/draw works, more advance users not need but this a begin. From basic to advance.
if you need c&p few times the same code you probably can do that better with a function. 