hey all,
i hope to find a math formula to acces grid MATRIX elements diagonaly!
so lets say i have a grid of mc:
(the numbers are the id’s)
10,12,13,14,15
16,17,18,19,20
21,22,23,24,25
26,27,28,29,30
31,32,33,34,35
so acces diagonaly from leftdown to rigthup i would have this:
10,16,12,21,17,13,26,22,18,14,31,27.23,19,15,32,28,24,20,33,29,25,34,30,35
HOW CAN I DO THIS? 
i need a formula when i decide to have a grid 100 x 100 it wil work to…
any help?
