What is the best way to `pick` in WebGPU?

Bob_Lil · August 27, 2024, 5:13am

I’ve been exploring WebGPURenderer and I’m currently working on object picking within the scene.
In previous WebGLRenderer, due to readPixel is sync, which may cause IO block type performance issue, choosing raycasting is usually a better way.
In WebGPU, is reading pixels turns to async? If true, maybe reading pixels is a better way for picking objects? However, I’m not 100 percent sure, and there is no examples or demonstrations now. Is this feature WIP?

Any advice or insights would be greatly appreciated!

Attila_Schroeder · August 27, 2024, 4:23pm

I think this is what you’re looking for.

https://threejs.org/examples/#webgpu_multiple_rendertargets_readback

Bob_Lil · August 28, 2024, 6:33am

Yes, that is exactly the examples on reading pixels async API. So I assume that raycast can be replaced by reading depth textures in a performance better way.

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What is the best way to `pick` in WebGPU?

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