Struct StreamChannels 

pub struct StreamChannels {
    channels: ArrayVec<(u32, ChannelEncoding), { StreamChannels::CAPACITY }>,
}

The channels one per-vertex stream carries, in the order they are interleaved.

Each channel is an attribute location paired with its encoding, and the attributes of a wgpu vertex-buffer layout are laid out in exactly this order: sequential offsets from the channel sizes, stride the sum of them.

Fields

channels: ArrayVec<(u32, ChannelEncoding), { StreamChannels::CAPACITY }>

The channels, in attribute order.

Implementations

impl StreamChannels

pub const CAPACITY: usize = 8

How many channels one stream can carry.

pub fn new(channels: impl IntoIterator<Item = (u32, ChannelEncoding)>) -> Self

A stream carrying channels, in attribute order.

Panics

If there are more than Self::CAPACITY of them.

pub fn push(&mut self, channel: (u32, ChannelEncoding))

Append one channel after the channels already declared.

Panics

If the stream already holds Self::CAPACITY channels.

pub fn iter(&self) -> impl Iterator<Item = &(u32, ChannelEncoding)>

The channels in attribute order.

pub fn is_empty(&self) -> bool

Whether no channel is declared, in which case the slot must be left out of a pipeline’s vertex-buffer list.

pub fn stride(&self) -> u32

Bytes per vertex, the sum of the channel sizes.

pub fn byte_len(&self, vertex_count: usize) -> usize

Bytes a vertex_count-long stream occupies.

pub fn attribute_offsets( &self, ) -> impl Iterator<Item = (u32, ChannelEncoding, u64)> + '_

The offset each channel’s attribute sits at, in attribute order.

These are the offsets a wgpu vertex-buffer layout declares; a packed stream writes its channels at the same offsets.

pub fn layout(&self) -> VertexBufferLayoutDesc

The wgpu vertex-buffer layout these channels describe.

The attributes are declared in channel order with the offsets Self::attribute_offsets reports and the stride Self::stride reports, so the layout a pipeline declares and the bytes PositionStreamWriter/SecondaryStreamWriter pack always agree.

Trait Implementations

impl Clone for StreamChannels

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StreamChannels

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StreamChannels

fn default() -> Self

Returns the “default value” for a type.

impl Eq for StreamChannels

impl Hash for StreamChannels

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for StreamChannels

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for StreamChannels