1 - Add the Loki folder to your Xcode Project
2 - Include the header in your Metal shader using something like: #import "../Loki/loki_header.metal"
3 - In your shader, initialize a Loki() object with (up to) 3 unsigned int seeds.
** It is recommended to use values that are unique to each thread such as pixel position.
4 - Call .rand() on your Loki object as many times as you would like.
The attached sample project simply creates a scene filled with random grey values generated using Loki. They change every frame using an iteration counter that is incremented each frame. It should look something like this:
