Oct 26, 2011
At some point you might end up needing to convert a 1d index value to access a 2d array. Here’s how you can do it.
// Texture is POT, NxN int x = index % N; int y = index / N;
As noted by Diogo Teixeira, one way to get rid of the mod/div operations would be:
int precalc_a = ( N - 1 ); int precalc_b = (int)log2( N ); int x = index & precalc_a; int y = index >> precalc_b;