geometry shader for xr

[HyeokSuLee]

I'm gonna make xr vision. Is there way to use geometry shader? I cannot find. And is this good way to use geometry shader for duplicate vision? Or just duplicate vertices(for xr vision) in cpu and send it to gpu?

[kvark]

We don't have any support for geometry shaders, and it isn't planned either (unless there is a strong need for it). WebGPU upstream is unlikely going to get it at all.

What I suggest to look into, instead, is https://github.com/gfx-rs/gfx/issues/2878

[stephanemagnenat]

A related question: is there a plan to be able to generate vertex data in a compute shader and pass that to the vertex shader? The use case I have in mind is a GPU-based 2D rendering library in which one would like the user to be able to push high-level primitives (such as a circle) as a "single" vertex along with all its data (center, radius, color...) as attributes to the GPU, and there have a geometry/compute shader able to generate triangles to be passed to the fragment shader (such as 8 or 16 triangles to avoid drawing too many transparent pixels).

[kvark]

is there a plan to be able to generate vertex data in a compute shader and pass that to the vertex shader

There doesn't need to be a plan for this. Your compute shader can write to a buffer, which then can be used as vertex buffer. You can do this today.

[cwfitzgerald]

Closing due to wgpu-rs -> wgpu transition and because there is an issue on gfx already. Please refile an issue on the wgpu repo if this is another issue.