[Algorithms] Flipping/Rotating through all possible combinations

[Zafar Q. <zaf...@co...>]

Hi,
I have done a water-shader but it looks like some of the values I'm refracting to may be wrong, hence picking up wrong sides of an environment map.

So, I want to try all possible iterations of swapping or negating x,y and z axes

eg.
1) x = -x

2) x= y

3) x = y
   y = z
4) x= -z
    y = x

etc
etc
etc

Does anyone know of an algorithm for going through all possible iterations?

Cheers
Zafar Qamar

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