Struct IndirectParametersGpuMetadata

#[repr(C)]
pub struct IndirectParametersGpuMetadata {
    pub mesh_index: u32,
    pub early_instance_count: u32,
    pub late_instance_count: u32,
}

A structure, written and read GPU, that records how many instances of each mesh are actually to be drawn.

The GPU mesh preprocessing shader increments the Self::early_instance_count and Self::late_instance_count as it determines that meshes are visible. The indirect parameter building shader reads this metadata in order to construct the indirect draw parameters.

Each batch will have one instance of this structure.

Fields

mesh_index: u32

The index of the first mesh in this batch in the array of MeshInputUniforms.

early_instance_count: u32

The number of instances that were judged visible last frame.

The CPU sets this value to 0, and the GPU mesh preprocessing shader increments it as it culls mesh instances.

late_instance_count: u32

The number of instances that have been judged potentially visible this frame that weren’t in the last frame’s potentially visible set.

The CPU sets this value to 0, and the GPU mesh preprocessing shader increments it as it culls mesh instances.

Trait Implementations

impl Clone for IndirectParametersGpuMetadata

fn clone(&self) -> IndirectParametersGpuMetadata

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl CreateFrom for IndirectParametersGpuMetadata

where IndirectParametersGpuMetadata: ShaderType<ExtraMetadata = StructMetadata<3>>, u32: for<'__> CreateFrom + for<'__> CreateFrom + for<'__> CreateFrom,

fn create_from<B>(reader: &mut Reader<B>) -> IndirectParametersGpuMetadata

where B: BufferRef,

impl Default for IndirectParametersGpuMetadata

fn default() -> IndirectParametersGpuMetadata

Returns the “default value” for a type.

impl ReadFrom for IndirectParametersGpuMetadata

where IndirectParametersGpuMetadata: ShaderType<ExtraMetadata = StructMetadata<3>>, u32: for<'__> ReadFrom + for<'__> ReadFrom + for<'__> ReadFrom,

fn read_from<B>(&mut self, reader: &mut Reader<B>)

where B: BufferRef,

impl ShaderSize for IndirectParametersGpuMetadata

where u32: ShaderSize,

const SHADER_SIZE: NonZero<u64> = _

Represents WGSL Size (equivalent to ShaderType::min_size)

impl ShaderType for IndirectParametersGpuMetadata

where u32: ShaderType + ShaderSize,

fn size(&self) -> NonZero<u64>

Returns the size of Self at runtime

fn min_size() -> NonZero<u64>

Represents the minimum size of Self (equivalent to GPUBufferBindingLayout.minBindingSize)

fn assert_uniform_compat()

Asserts that Self meets the requirements of the uniform address space restrictions on stored values and the uniform address space layout constraints

impl WriteInto for IndirectParametersGpuMetadata

where IndirectParametersGpuMetadata: ShaderType<ExtraMetadata = StructMetadata<3>>, u32: for<'__> WriteInto + for<'__> WriteInto + for<'__> WriteInto,

fn write_into<B>(&self, writer: &mut Writer<B>)

where B: BufferMut,

impl Zeroable for IndirectParametersGpuMetadata

fn zeroed() -> Self

Calls zeroed.

impl Copy for IndirectParametersGpuMetadata

impl Pod for IndirectParametersGpuMetadata