Struct VertexAttributeDescriptor

pub struct VertexAttributeDescriptor {
    pub usage: VertexAttributeUsage,
    pub data_type: VertexAttributeDataType,
    pub size: u8,
    pub divisor: u8,
    pub shader_location: u8,
    pub normalized: bool,
}

Input vertex attribute descriptor used to construct layouts and feed vertex buffer.

Fields

usage: VertexAttributeUsage

Claimed usage of the attribute. It could be Position, Normal, etc.

data_type: VertexAttributeDataType

Data type of every component of the attribute. It could be F32, U32, U16, etc.

size: u8

Size of attribute expressed in components. For example, for Position it could be 3 - which means there are 3 components in attribute of data_type.

divisor: u8

Sets a “fetch rate” for vertex shader at which it will read vertex attribute: 0 - per vertex (default) 1 - per instance 2 - per 2 instances and so on.

shader_location: u8

Defines location of the attribute in a shader (layout(location = x) attrib;)

normalized: bool

Whether the attribute values should be normalized into 0.0..1.0 range or not. If this field is set to false, then the numbers will appear “as-is” when fetching them in a shader. On the other hand, if it is true, then any numeric value will be normalized by applying normalized = num / T::max() equation. This way all numbers will always stay in 0.0..1.0 range.

For example, normalization could be useful for RGB colors that expressed as three bytes (u8). In this case normalization will turn the color into 0.0..1.0 range.

Trait Implementations

impl Debug for VertexAttributeDescriptor

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

Formats the value using the given formatter.

impl Hash for VertexAttributeDescriptor

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.