How to move Buffer created from local RenderingDevice to the main RenderingDevice

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1

Godot Version

4.5.1

Question

I’m trying to get my marching cubes working without any GPU readback in Godot, and I’m very close. At the moment, I have successfully generated triangles and an indirect args buffer for the RenderingDevice.DrawListDrawIndirect call. I’ve been able to render a triangle using RenderingDevice.DrawListDrawIndirect, this used buffers with dummy triangle data put into a buffer using a rendering device obtained through RenderingServer.GetRenderingDevice.

The issue is, the compute shader that generates the triangles uses buffers created by RenderingServer.CreateLocalRenderingDevice. If I try to use the uniform set for the vertex buffer when trying to render, it just doesn’t work. I’m 99% sure it is because RenderingDevice can’t share RID’s with each other since they track them individually. I could probably use RenderingServer.BufferCopy, but that is obviously not ideal.

Is there a way of sharing a buffer between rendering devices so I can render the compute shader triangles?

2

Afaik, there’s no way to share between different devices without involving the CPU. Can you do everything on the main device?

3

I’m facing the same problem like you do. May I know if you have found any solution yet?