WGPU Camera - Properties Seem Fine But Cant See Cubes

[lavish olive]

Hi All,

I have started playing around with wgpu as a way to continue to learn rust and just for a bit of fun. I have mostly been following this tutorial (https://sotrh.github.io/learn-wgpu/#what-is-wgpu) however I have made a few adjustments (probably shouldnt have, but im committed now). I set it up to use winit version 0.30 and instead of cgmath I went with nalgerbra.

So I got the surface set up fine and could render a shape as shown in the tutorial, but then I jumped into adding a camera, this mostly went fine and I managed to get my version compiling however, I cannot see the cubes that I have set up. I have looked over the code and and print debug statements to check the camera and projection properties and they seem fine, so I am a bit stumped for what to look for next.

It is a tiny code base at the moment so an sort of quick glance would be appreciated! https://github.com/euandeas/voxels

going to try and sleep on it, so will get back to any replies in morning.

[rough spear]

In your WGSL you declared

struct CameraUniform {
    view_proj: mat4x4<f32>,
};

and in Rust

pub struct CameraUniform {
    view_position: [f32; 4],
    view_proj: [[f32; 4]; 4],
}

These layouts don't match (because view_position is missing), so view_proj won't be read by the shader correctly

Also, while I was looking for the problem, I noticed in https://github.com/euandeas/voxels/blob/master/src/lib.rs that run() is a blocking function, not an async function, so it should not be declared async

[lavish olive]

Thanks, I made the adjustment but no luck unfortunately.

[dreamy zinc]

could be field ordering issue, use c representation for your struct

#[repr(C)]
pub struct CameraUniform {
    view_position: [f32; 4],
    view_proj: [[f32; 4]; 4],
}

[lavish olive]

yeh already had that in place when testing above...

[lavish olive]

ah i somewhat have got it working, turns out i was my vertex code

[lavish olive]

only think now is the movement is completely wack so, my maths must be off somehwere