Struct EntityIdAccessor

pub struct EntityIdAccessor { /* private fields */ }

Implementations

impl EntityIdAccessor

pub fn new() -> Self

pub fn borrow_ids<T: 'static + Component>( &mut self, manager: &EntityManager, ) -> Option<&Vec<usize>>

pub fn borrow_ids_for_pair<T1: 'static + Component, T2: 'static + Component>( &mut self, manager: &EntityManager, ) -> Option<&Vec<usize>>

Examples found in repository

examples/move/main.rs (line 52)

	fn update(&mut self, manager: &mut EntityManager, accessor: &mut EntityIdAccessor) {
		let entity_ids = accessor.borrow_ids_for_pair::<Velocity, Position>(manager).unwrap();
		for id in entity_ids.iter() {
			let (velocity, mut position) = manager.borrow_component_pair_mut::<Velocity, Position>(*id).unwrap();
			position.x += velocity.x;
			position.y += velocity.y;
		}
	}
}

impl System for PrintPositionSystem {
	fn update(&mut self, manager: &mut EntityManager, accessor: &mut EntityIdAccessor) {
		let entity_ids = accessor.borrow_ids_for_pair::<Namable, Position>(manager).unwrap();
		for id in entity_ids.iter() {
			let name = manager.borrow_component::<Namable>(*id).unwrap();
			let position = manager.borrow_component::<Position>(*id).unwrap();
			println!("{} is at ({}, {})", name.name, position.x, position.y);
		}
	}

pub fn borrow_ids_for_triple<T1: 'static + Component, T2: 'static + Component, T3: 'static + Component>( &mut self, manager: &EntityManager, ) -> Option<&Vec<usize>>

pub fn borrow_ids_for_quad<T1: 'static + Component, T2: 'static + Component, T3: 'static + Component, T4: 'static + Component>( &mut self, manager: &EntityManager, ) -> Option<&Vec<usize>>