[Chapter 12: Render Passes] Object selection

[caroline]

Hi @armorix and welcome to the forums !

I’m afraid I don’t have a non-Apple Silicon device any more to test it

However, this could be related to the scale factor of the device not being x2 (although I thought the MacBook Pro i9 is x2), which I failed to take into account. If you try out the app on iPhone Pro Max, which has a scale factor of 3, it doesn’t work either.

This thread has the code to fix the problem:

Question about input coordinates in fragment shader

I am working along Chapter 12: Render Passes. Towards the end, when we pass the ID Texture that is the result of rendering to a render pass with an r32Uint texture as color attachment 0, I see this fragment shader snippet that determines wether an object has been clicked by checking the ID against the .r value encoded in the texture: if (!is_null_texture(idTexture)) { uint2 coord = uint2(params.touchX * 2, params.touchY * 2); uint objectID = idTexture.read(coord).r; if (params.objectId !=…