Add ability to pass compute buffers to vertex/fragment shaders

### Describe the project you are working on Procedural mesh generation in compute shaders. ### Describe the problem or limitation you are having in your project The buffers containing the mesh data have to be read back and processed on the CPU into vertex buffers. ### Describe the feature / enhancement and how it helps to overcome the problem or limitation I think it would be really helpful to allow storage buffers to be bound to and also accessed in vertex/fragment shaders. This would greatly expand the potential uses for compute shaders as the current implementation requires CPU readback which can be a significant performance bottleneck. ### Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams A storage buffer can be bound to a vertex/fragment shader with a function similar to set_shader_parameter eg ```gdscript var buffer := rd.storage_buffer_create(input_bytes.size(), input_bytes) myShaderMaterial.set_shader_parameter("myBuffer", buffer) # something like this ``` Which could then be used in said shader to allow procedural drawing eg. ```glsl shader_type spatial; layout(set = 0, binding = 0, std430) restrict buffer bufferType { vec4 positions[]; } myBuffer; void vertex() { VERTEX += myBuffer.positions[VERTEX_ID]; } void fragment() { COLOR = vec4(0.4, 0.6, 0.9, 1.0); } ``` ### If this enhancement will not be used often, can it be worked around with a few lines of script? I don't believe it's possible to implement thi

Posted by jtsorlinis on May 31, 2023, 6:36 AM

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