Trait gfx_phase::Technique

pub trait Technique<R: Resources, M: Material, V: ToDepth> {
    type Kernel: Copy + Debug + Eq + Hash;
    type Params: ShaderParam<Resources = R>;
    fn test(&self, _: &Mesh<R>, _: &M) -> Option<Self::Kernel>;
    fn compile<'a>(&'a self, _: Self::Kernel) -> TechResult<'a, R, Self::Params>;
    fn fix_params(&self, _: &M, _: &V, _: &mut Self::Params);
}

Technique is basically a Fn(Entity) -> Option<TechResult>. It processes a material, checks for the compatibility, adds a mesh to produce a shader program with associated data (state, parameters).

Associated Types

type Kernel: Copy + Debug + Eq + Hash

The most important part of the entity, which is enough to decide which program or state to use on it.

type Params: ShaderParam<Resources = R>

Associated shader parameters.

Required Methods

fn test(&self, _: &Mesh<R>, _: &M) -> Option<Self::Kernel>

Test if this mesh/material can be drawn using the technique.

fn compile<'a>(&'a self, _: Self::Kernel) -> TechResult<'a, R, Self::Params>

Compile a given kernel by producing a program, parameter block, a draw state, and optional instancing data.

fn fix_params(&self, _: &M, _: &V, _: &mut Self::Params)

Fix the shader parameters, using an updated material and view info. Called every time before a batch is added to the draw queue.

Implementors