Module vertexformat

Expand description

Yes, these differ from crate::shaderprimitives.

Vertex buffers are packed a lot more tightly, requiring different alignment. The naming convention also follows that of wgpu::VertexFormat rather than wgsl-looking types, because that’s what wgpu::vertex_attr_array! takes.

All these types are internally represented by arrays. For example Float32x3 is just a unit struct over [f32; 3], but a single [Float32] is also an array of length 1 ([f32; 1]). Of course you can deref them into regular arrays, but keep in mind that’s not what they directly are.

// There shouldn't be a reason to construct these explicitly, just pass
// arrays into vertex struct constructors, but for the sake of the example
let mut float32_3: Float32x3 = [1.0, 2.0, 3.0].into();
*float32_3 = [3.0, 2.0, 1.0];
float32_3[2] = 0.0;
let bytes: &[u32] = float32_3.as_ref();