help texture mapping

good morning, i’m trying to map a matrix in gpu memory using texture mapping to make some operations… , i’ve read something in this tutorial
. my problem is that i can’t use rgb values because i need to mantain my values order, if i use a rgb vector, how can I maintain the order when i’ll copy back to disc the matrix ?


I don’t totally understand your problem, but I think that this post and maybe this other one from my blog could help you.