Width, Height, Location Indices

x = current_index % width;
y = current_index / width; // Assuming integers
width = total_indices / height;
height = total_indices / width;

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x = current_index % width;
0 = (i=0) % (w=20)
1 = (i=1) % (w=20)
2 = (i=2) % (w=20)
....
19 = (i=19) % (w=20)
20 = (i=20) % (w=20)
21 = (i=21) % (w=20)
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y = current_index / width; // Assuming integers
0 = (i=0) / (w=15)
0 = (i=1) / (w=15)
0 = (i=2) / (w=15)
....
0 = (i=14) / (w=15)
1 = (i=15) / (w=15)
1 = (i=16) / (w=15)