Enum PrimitiveAssemblerDesc

pub enum PrimitiveAssemblerDesc<'a, B: Backend> {
    Vertex {
        buffers: &'a [VertexBufferDesc],
        attributes: &'a [AttributeDesc],
        input_assembler: InputAssemblerDesc,
        vertex: EntryPoint<'a, B>,
        tessellation: Option<(EntryPoint<'a, B>, EntryPoint<'a, B>)>,
        geometry: Option<EntryPoint<'a, B>>,
    },
    Mesh {
        task: Option<EntryPoint<'a, B>>,
        mesh: EntryPoint<'a, B>,
    },
}

Primitive Assembler describes how input data are fetched in the pipeline and formed into primitives before being sent into the fragment shader.

Variants

Vertex

Vertex based pipeline

Fields

buffers: &'a [VertexBufferDesc]

Vertex buffers (IA)

attributes: &'a [AttributeDesc]

Vertex attributes (IA)

input_assembler: InputAssemblerDesc

Input assembler attributes, describes how vertices are assembled into primitives (such as triangles).

vertex: EntryPoint<'a, B>

A shader that outputs a vertex in a model.

tessellation: Option<(EntryPoint<'a, B>, EntryPoint<'a, B>)>

Tesselation shaders consisting of:

1. Hull shader: takes in an input patch (values representing a small portion of a shape, which may be actual geometry or may be parameters for creating geometry) and produces one or more output patches.

2. Domain shader: takes in domains produced from a hull shader’s output patches and computes actual vertex positions.

geometry: Option<EntryPoint<'a, B>>

A shader that takes given input vertexes and outputs zero or more output vertexes.

Mesh

Mesh shading pipeline

Fields

task: Option<EntryPoint<'a, B>>

A shader that creates a variable amount of mesh shader invocations.

mesh: EntryPoint<'a, B>

A shader of which each workgroup emits zero or more output primitives and the group of vertices and their associated data required for each output primitive.

Trait Implementations

impl<'a, B: Debug + Backend> Debug for PrimitiveAssemblerDesc<'a, B>

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

Formats the value using the given formatter.