Struct RenderCommandState

pub struct RenderCommandState<P: PhaseItem + 'static, C: RenderCommand<P>> { /* private fields */ }

Wraps a RenderCommand into a state so that it can be used as a Draw function.

The RenderCommand::Param, RenderCommand::ViewQuery and RenderCommand::ItemQuery are fetched from the ECS and passed to the command.

Implementations

impl<P: PhaseItem, C: RenderCommand<P>> RenderCommandState<P, C>

pub fn new(world: &mut World) -> Self

Creates a new RenderCommandState for the RenderCommand.

Trait Implementations

impl<P: PhaseItem, C: RenderCommand<P> + Send + Sync + 'static> Draw<P> for RenderCommandState<P, C>

where C::Param: ReadOnlySystemParam,

fn prepare(&mut self, world: &World)

Prepares the render command to be used. This is called once and only once before the phase begins. There may be zero or more draw calls following a call to this function.

fn draw<'w>( &mut self, world: &'w World, pass: &mut TrackedRenderPass<'w>, view: Entity, item: &P, ) -> Result<(), DrawError>

Fetches the ECS parameters for the wrapped RenderCommand and then renders it.