How to use Texture slices in instanced draw primitive on Apple Metal.

So, I have looking for samples to show how to do that, and I could not find a complete solution, so, it is important to understand the difference between array<Texture, XXX> and texture2d_array

If you understand that, it gets a lot easier immediately. I let you go and read the difference on the apple documentation, but this is pretty clear there.

here is the shader piece you need to understand:

Notice that the index of the texture is passed by the vertexes.

here is the magic for loading the textures with slices …

Objective C loading Texture array with Slices.

Now, you are almost there… you need to call draw primitive with the right call, including an instance index.

Don’t forget to stack one uniform for each of your instance, as the apple sample shows you, and adding this let you change the texture for each object!

Et Voila 😉