Struct SceneUnpackingJob 

pub struct SceneUnpackingJob {
    pub render_binned_mesh_instance_buffer: Buffer,
    pub bin_metadata_buffer: Buffer,
    pub fan_buffer: Buffer,
    pub bin_index_to_bin_metadata_index_buffer: Buffer,
    pub bin_unpacking_metadata_index: BinUnpackingMetadataIndex,
    pub uniform_allocation_metadata_index: UniformAllocationMetadataIndex,
    pub mesh_instance_count: u32,
    pub bin_count: u32,
}

CPU-side information needed to construct the bind groups and issue the dispatch for the unpack_bins and allocate_uniforms shaders, for a single batch set.

Because those two shaders are always invoked together, we combine the information together for efficiency’s sake.

Fields

render_binned_mesh_instance_buffer: Buffer

The GPU buffer of GpuRenderBinnedMeshInstances corresponding to the mesh instances that this batch set contains.

This is used in the unpack_bins shader.

bin_metadata_buffer: Buffer

The GPU buffer that stores various metadata for each bin, including the indirect parameters offset and the instance count.

This is used in both the allocate_uniforms and unpack_bins shaders.

fan_buffer: Buffer

A temporary GPU buffer that stores the mesh uniform index of the last instance plus one for each workgroup (i.e. for each 256-bin chunk).

This is accumulated in the second stage of the allocate_uniforms shader and written out in the third.

bin_index_to_bin_metadata_index_buffer: Buffer

A GPU buffer that maps the stable index of each bin to the index of the metadata in the Self::bin_metadata_buffer.

bin_unpacking_metadata_index: BinUnpackingMetadataIndex

The index of this batch set’s GpuBinUnpackingMetadata in the SceneUnpackingBuffers::bin_unpacking_metadata buffer.

uniform_allocation_metadata_index: UniformAllocationMetadataIndex

The index of this batch set’s GpuUniformAllocationMetadata in the SceneUnpackingBuffers::uniform_allocation_metadata buffer.

mesh_instance_count: u32

The total number of mesh instances in this batch set.

bin_count: u32

The total number of bins (i.e. draws, i.e. separate meshes) in this batch set.